On Monday, Oct. 26, KrebsOnSecurity began following up on a tip from a reliable source that an aggressive Russian cybercriminal gang known for deploying ransomware was preparing to disrupt information technology systems at hundreds of hospitals, clinics and medical care facilities across the United States. Today, officials from the FBI and the U.S. Department of Homeland Security hastily assembled a conference call with healthcare industry executives warning about an “imminent cybercrime threat to U.S. hospitals and healthcare providers.”
The agencies on the conference call, which included the U.S. Department of Health and Human Services (HHS), warned participants about “credible information of an increased and imminent cybercrime threat to US hospitals and healthcare providers.”
The agencies said they were sharing the information “to provide warning to healthcare providers to ensure that they take timely and reasonable precautions to protect their networks from these threats.”
The warning came less than two days after this author received a tip from Alex Holden, founder of Milwaukee-based cyber intelligence firm Hold Security. Holden said he saw online communications this week between cybercriminals affiliated with a Russian-speaking ransomware group known as Ryuk in which group members discussed plans to deploy ransomware at more than 400 healthcare facilities in the U.S.
One participant on the government conference call today said the agencies offered few concrete details of how healthcare organizations might better protect themselves against this threat actor or purported malware campaign.
“They didn’t share any IoCs [indicators of compromise], so it’s just been ‘patch your systems and report anything suspicious’,” said a healthcare industry veteran who sat in on the discussion.
However, others on the call said IoCs may be of little help for hospitals that have already been infiltrated by Ryuk. That’s because the malware infrastructure used by the Ryuk gang is often unique to each victim, including everything from the Microsoft Windows executable files that get dropped on the infected hosts to the so-called “command and control” servers used to transmit data between and among compromised systems.
Nevertheless, cybersecurity incident response firm Mandiant today released a list of domains and Internet addresses used by Ryuk in previous attacks throughout 2020 and up to the present day. Mandiant refers to the group by the threat actor classification “UNC1878,” and aired a webcast today detailing some of Ryuk’s latest exploitation tactics.
Charles Carmakal, senior vice president for Mandiant, told Reuters that UNC1878 is one of most brazen, heartless, and disruptive threat actors he’s observed over the course of his career.
“Multiple hospitals have already been significantly impacted by Ryuk ransomware and their networks have been taken offline,” Carmakal said.
One health industry veteran who participated in the call today and who spoke with KrebsOnSecurity on condition of anonymity said if there truly are hundreds of medical facilities at imminent risk here, that would seem to go beyond the scope of any one hospital group and may implicate some kind of electronic health record provider that integrates with many care facilities.
So far, however, nothing like hundreds of facilities have publicly reported ransomware incidents. But there have been a handful of hospitals dealing with ransomware attacks in the past few days.
–Becker’s Hospital Review reported today that a ransomware attack hit Klamath Falls, Ore.-based Sky Lakes Medical Center’s computer systems.
–WWNY’s Channel 7 News in New York reported yesterday that a Ryuk ransomware attack on St. Lawrence Health System led to computer infections at Caton-Potsdam, Messena and Gouverneur hospitals.
–SWNewsMedia.com on Monday reported on “unidentified network activity” that caused disruption to certain operations at Ridgeview Medical Center in Waconia, Minn. SWNews says Ridgeview’s system includes Chaska’s Two Twelve Medical Center, three hospitals, clinics and other emergency and long-term care sites around the metro area.
–NBC5 reports The University of Vermont Health Network is dealing with a “significant and ongoing system-wide network issue” that could be a malicious cyber attack.
This is a developing story. Stay tuned for further updates.
Update, 10:11 p.m. ET: The FBI, DHS and HHS just jointly issued an alert about this, available here.
In March 2020, KrebsOnSecurity alerted Swedish security giant Gunnebo Group that hackers had broken into its network and sold the access to a criminal group which specializes in deploying ransomware. In August, Gunnebo said it had successfully thwarted a ransomware attack, but this week it emerged that the intruders stole and published online tens of thousands of sensitive documents — including schematics of client bank vaults and surveillance systems.
The Gunnebo Group is a Swedish multinational company that provides physical security to a variety of customers globally, including banks, government agencies, airports, casinos, jewelry stores, tax agencies and even nuclear power plants. The company has operations in 25 countries, more than 4,000 employees, and billions in revenue annually.
Acting on a tip from Milwaukee, Wis.-based cyber intelligence firm Hold Security, KrebsOnSecurity in March told Gunnebo about a financial transaction between a malicious hacker and a cybercriminal group which specializes in deploying ransomware. That transaction included credentials to a Remote Desktop Protocol (RDP) account apparently set up by a Gunnebo Group employee who wished to access the company’s internal network remotely.
Five months later, Gunnebo disclosed it had suffered a cyber attack targeting its IT systems that forced the shutdown of internal servers. Nevertheless, the company said its quick reaction prevented the intruders from spreading the ransomware throughout its systems, and that the overall lasting impact from the incident was minimal.
Earlier this week, Swedish news agency Dagens Nyheter confirmed that hackers recently published online at least 38,000 documents stolen from Gunnebo’s network. Linus Larsson, the journalist who broke the story, says the hacked material was uploaded to a public server during the second half of September, and it is not known how many people may have gained access to it.
Larsson quotes Gunnebo CEO Stefan Syrén saying the company never considered paying the ransom the attackers demanded in exchange for not publishing its internal documents. What’s more, Syrén seemed to downplay the severity of the exposure.
“I understand that you can see drawings as sensitive, but we do not consider them as sensitive automatically,” the CEO reportedly said. “When it comes to cameras in a public environment, for example, half the point is that they should be visible, therefore a drawing with camera placements in itself is not very sensitive.”
It remains unclear whether the stolen RDP credentials were a factor in this incident. But the password to the Gunnebo RDP account — “password01” — suggests the security of its IT systems may have been lacking in other areas as well.
After this author posted a request for contact from Gunnebo on Twitter, KrebsOnSecurity heard from Rasmus Jansson, an account manager at Gunnebo who specializes in protecting client systems from electromagnetic pulse (EMP) attacks or disruption, short bursts of energy that can damage electrical equipment.
Jansson said he relayed the stolen credentials to the company’s IT specialists, but that he does not know what actions the company took in response. Reached by phone today, Jansson said he quit the company in August, right around the time Gunnebo disclosed the thwarted ransomware attack. He declined to comment on the particulars of the extortion incident.
Ransomware attackers often spend weeks or months inside of a target’s network before attempting to deploy malware across the network that encrypts servers and desktop systems unless and until a ransom demand is met.
That’s because gaining the initial foothold is rarely the difficult part of the attack. In fact, many ransomware groups now have such an embarrassment of riches in this regard that they’ve taken to hiring external penetration testers to carry out the grunt work of escalating that initial foothold into complete control over the victim’s network and any data backup systems — a process that can be hugely time consuming.
But prior to launching their ransomware, it has become common practice for these extortionists to offload as much sensitive and proprietary data as possible. In some cases, this allows the intruders to profit even if their malware somehow fails to do its job. In other instances, victims are asked to pay two extortion demands: One for a digital key to unlock encrypted systems, and another in exchange for a promise not to publish, auction or otherwise trade any stolen data.
While it may seem ironic when a physical security firm ends up having all of its secrets published online, the reality is that some of the biggest targets of ransomware groups continue to be companies which may not consider cybersecurity or information systems as their primary concern or business — regardless of how much may be riding on that technology.
Indeed, companies that persist in viewing cyber and physical security as somehow separate seem to be among the favorite targets of ransomware actors. Last week, a Russian journalist published a video on Youtube claiming to be an interview with the cybercriminals behind the REvil/Sodinokibi ransomware strain, which is the handiwork of a particularly aggressive criminal group that’s been behind some of the biggest and most costly ransom attacks in recent years.
In the video, the REvil representative stated that the most desirable targets for the group were agriculture companies, manufacturers, insurance firms, and law firms. The REvil actor claimed that on average roughly one in three of its victims agrees to pay an extortion fee.
Mark Arena, CEO of cybersecurity threat intelligence firm Intel 471, said while it might be tempting to believe that firms which specialize in information security typically have better cybersecurity practices than physical security firms, few organizations have a deep understanding of their adversaries. Intel 471 has published an analysis of the video here.
Arena said this is a particularly acute shortcoming with many managed service providers (MSPs), companies that provide outsourced security services to hundreds or thousands of clients who might not otherwise be able to afford to hire cybersecurity professionals.
“The harsh and unfortunate reality is the security of a number of security companies is shit,” Arena said. “Most companies tend to have a lack of ongoing and up to date understanding of the threat actors they face.”
A week ago, KrebsOnSecurity broke the news that someone was attempting to disrupt the Trickbot botnet, a malware crime machine that has infected millions of computers and is often used to spread ransomware. A new report Friday says the coordinated attack was part of an operation carried out by the U.S. military’s Cyber Command.
On October 2, KrebsOnSecurity reported that twice in the preceding ten days, an unknown entity that had inside access to the Trickbot botnet sent all infected systems a command telling them to disconnect themselves from the Internet servers the Trickbot overlords used to control compromised Microsoft Windows computers.
On top of that, someone had stuffed millions of bogus records about new victims into the Trickbot database — apparently to confuse or stymie the botnet’s operators.
In a story published Oct. 9, The Washington Post reported that four U.S. officials who spoke on condition of anonymity said the Trickbot disruption was the work of U.S. Cyber Command, a branch of the Department of Defense headed by the director of the National Security Agency (NSA).
The Post report suggested the action was a bid to prevent Trickbot from being used to somehow interfere with the upcoming presidential election, noting that Cyber Command was instrumental in disrupting the Internet access of Russian online troll farms during the 2018 midterm elections.
The Post said U.S. officials recognized their operation would not permanently dismantle Trickbot, describing it rather as “one way to distract them for at least a while as they seek to restore their operations.”
Alex Holden, chief information security officer and president of Milwaukee-based Hold Security, has been monitoring Trickbot activity before and after the 10-day operation. Holden said while the attack on Trickbot appears to have cut its operators off from a large number of victim computers, the bad guys still have passwords, financial data and reams of other sensitive information stolen from more than 2.7 million systems around the world.
Holden said the Trickbot operators have begun rebuilding their botnet, and continue to engage in deploying ransomware at new targets.
“They are running normally and their ransomware operations are pretty much back in full swing,” Holden said. “They are not slowing down because they still have a great deal of stolen data.”
Holden added that since news of the disruption first broke a week ago, the Russian-speaking cybercriminals behind Trickbot have been discussing how to recoup their losses, and have been toying with the idea of massively increasing the amount of money demanded from future ransomware victims.
“There is a conversation happening in the back channels,” Holden said. “Normally, they will ask for [a ransom amount] that is something like 10 percent of the victim company’s annual revenues. Now, some of the guys involved are talking about increasing that to 100 percent or 150 percent.”
Over the past 10 days, someone has been launching a series of coordinated attacks designed to disrupt Trickbot, an enormous collection of more than two million malware-infected Windows PCs that are constantly being harvested for financial data and are often used as the entry point for deploying ransomware within compromised organizations.
On Sept. 22, someone pushed out a new configuration file to Windows computers currently infected with Trickbot. The crooks running the Trickbot botnet typically use these config files to pass new instructions to their fleet of infected PCs, such as the Internet address where hacked systems should download new updates to the malware.
But the new configuration file pushed on Sept. 22 told all systems infected with Trickbot that their new malware control server had the address 127.0.0.1, which is a “localhost” address that is not reachable over the public Internet, according to an analysis by cyber intelligence firm Intel 471.
It’s not known how many Trickbot-infected systems received the phony update, but it seems clear this wasn’t just a mistake by Trickbot’s overlords. Intel 471 found that it happened yet again on Oct. 1, suggesting someone with access to the inner workings of the botnet was trying to disrupt its operations.
“Shortly after the bogus configs were pushed out, all Trickbot controllers stopped responding correctly to bot requests,” Intel 471 wrote in a note to its customers. “This possibly means central Trickbot controller infrastructure was disrupted. The close timing of both events suggested an intentional disruption of Trickbot botnet operations.”
Intel 471 CEO Mark Arena said it’s anyone’s guess at this point who is responsible.
“Obviously, someone is trying to attack Trickbot,” Arena said. “It could be someone in the security research community, a government, a disgruntled insider, or a rival cybercrime group. We just don’t know at this point.”
Arena said it’s unclear how successful these bogus configuration file updates will be given that the Trickbot authors built a fail-safe recovery system into their malware. Specifically, Trickbot has a backup control mechanism: A domain name registered on EmerDNS, a decentralized domain name system.
“This domain should still be in control of the Trickbot operators and could potentially be used to recover bots,” Intel 471 wrote.
But whoever is screwing with the Trickbot purveyors appears to have adopted a multi-pronged approach: Around the same time as the second bogus configuration file update was pushed on Oct. 1, someone stuffed the control networks that the Trickbot operators use to keep track of data on infected systems with millions of new records.
Alex Holden is chief technology officer and founder of Hold Security, a Milwaukee-based cyber intelligence firm that helps recover stolen data. Holden said at the end of September Trickbot held passwords and financial data stolen from more than 2.7 million Windows PCs.
By October 1, Holden said, that number had magically grown to more than seven million.
“Someone is flooding the Trickbot system with fake data,” Holden said. “Whoever is doing this is generating records that include machine names indicating these are infected systems in a broad range of organizations, including the Department of Defense, U.S. Bank, JP Morgan Chase, PNC and Citigroup, to name a few.”
Holden said the flood of new, apparently bogus, records appears to be an attempt by someone to dilute the Trickbot database and confuse or stymie the Trickbot operators. But so far, Holden said, the impact has been mainly to annoy and aggravate the criminals in charge of Trickbot.
“Our monitoring found at least one statement from one of the ransomware groups that relies on Trickbot saying this pisses them off, and they’re going to double the ransom they’re asking for from a victim,” Holden said. “We haven’t been able to confirm whether they actually followed through with that, but these attacks are definitely interfering with their business.”
Intel 471’s Arena said this could be part of an ongoing campaign to dismantle or wrest control over the Trickbot botnet. Such an effort would hardly be unprecedented. In 2014, for example, U.S. and international law enforcement agencies teamed up with multiple security firms and private researchers to commandeer the Gameover Zeus Botnet, a particularly aggressive and sophisticated malware strain that had enslaved up to 1 million Windows PCs globally.
Trickbot would be an attractive target for such a takeover effort because it is widely viewed as a platform used to find potential ransomware victims. Intel 471 describes Trickbot as “a malware-as-a-service platform that caters to a relatively small number of top-tier cybercriminals.”
One of the top ransomware gangs in operation today — which deploys ransomware strains known variously as “Ryuk” and “Conti,” is known to be closely associated with Trickbot infections. Both ransomware families have been used in some of the most damaging and costly malware incidents to date.
The latest Ryuk victim is Universal Health Services (UHS), a Fortune 500 hospital and healthcare services provider that operates more than 400 facilities in the U.S. and U.K.
On Sunday, Sept. 27, UHS shut down its computer systems at healthcare facilities across the United States in a bid to stop the spread of the malware. The disruption has reportedly caused the affected hospitals to redirect ambulances and relocate patients in need of surgery to other nearby hospitals.
Identity thieves who specialize in running up unauthorized lines of credit in the names of small businesses are having a field day with all of the closures and economic uncertainty wrought by the COVID-19 pandemic, KrebsOnSecurity has learned. This story is about the victims of a particularly aggressive business ID theft ring that’s spent years targeting small businesses across the country and is now pivoting toward using that access for pandemic assistance loans and unemployment benefits.
Most consumers are likely aware of the threat from identity theft, which occurs when crooks apply for new lines of credit in your name. But the same crime can be far more costly and damaging when thieves target small businesses. Unfortunately, far too many entrepreneurs are simply unaware of the threat or don’t know how to be watchful for it.
What’s more, with so many small enterprises going out of business or sitting dormant during the COVID-19 pandemic, organized fraud rings have an unusually rich pool of targets to choose from.
Short Hills, N.J.-based Dun & Bradstreet [NYSE:DNB] is a data analytics company that acts as a kind of de facto credit bureau for companies: When a business owner wants to open a new line of credit, creditors typically check with Dun & Bradstreet to gauge the business’s history and trustworthiness.
In 2019, Dun & Bradstreet saw more than a 100 percent increase in business identity theft. For 2020, the company estimates an overall 258 percent spike in the crime. Dun & Bradstreet said that so far this year it has received over 4,700 tips and leads where business identity theft or malfeasance are suspected.
“The ferocity of cyber criminals to take advantage of COVID-19 uncertainties by preying on small businesses is disturbing,” said Andrew LaMarca, who leads the global high-risk and fraud team at Dun & Bradstreet.
For the past several months, Milwaukee, Wisc. based cyber intelligence firm Hold Security has been monitoring the communications between and among a businesses ID theft gang apparently operating in Georgia and Florida but targeting businesses throughout the United States. That surveillance has helped to paint a detailed picture of how business ID thieves operate, as well as the tricks they use to gain credit in a company’s name.
Hold Security founder Alex Holden said the group appears to target both active and dormant or inactive small businesses. The gang typically will start by looking up the business ownership records at the Secretary of State website that corresponds to the company’s state of incorporation. From there, they identify the officers and owners of the company, acquire their Social Security and Tax ID numbers from the dark web and other sources online.
To prove ownership over the hijacked firms, they hire low-wage image editors online to help fabricate and/or modify a number of official documents tied to the business — including tax records and utility bills.
The scammers frequently then file phony documents with the Secretary of State’s office in the name(s) of the business owners, but include a mailing address that they control. They also create email addresses and domain names that mimic the names of the owners and the company to make future credit applications appear more legitimate, and submit the listings to business search websites, such as yellowpages.com.
For both dormant and existing businesses, the fraudsters attempt to create or modify the target company’s accounts at Dun & Bradstreet. In some cases, the scammers create dashboard accounts in the business’s names at Dun & Bradstreet’s credit builder portal; in others, the bad guys have actually hacked existing business accounts at DNB, requesting a new DUNS numbers for the business (a DUNS number is a unique, nine-digit identifier for businesses).
Finally, after the bogus profiles are approved by Dun & Bradstreet, the gang waits a few weeks or months and then starts applying for new lines of credit in the target business’s name at stores like Home Depot, Office Depot and Staples. Then they go on a buying spree with the cards issued by those stores.
Usually, the first indication a victim has that they’ve been targeted is when the debt collection companies start calling.
“They are using mostly small companies that are still active businesses but currently not operating because of COVID-19,” Holden said. “With this gang, we see four or five people working together. The team leader manages the work between people. One person seems to be in charge of getting stolen cards from the dark web to pay for the reactivation of businesses through the secretary of state sites. Another team member works on revising the business documents and registering them on various sites. The others are busy looking for specific businesses they want to revive.”
Holden said the gang appears to find success in getting new lines of credit with about 20 percent of the businesses they target.
“One’s personal credit is nothing compared to the ability of corporations to borrow money,” he said. “That’s bad because while the credit system may be flawed for individuals, it’s an even worse situation on average when we’re talking about businesses.”
Holden said over the past few months his firm has seen communications between the gang’s members indicating they have temporarily shifted more of their energy and resources to defrauding states and the federal government by filing unemployment insurance claims and apply for pandemic assistance loans with the Small Business Administration.
“It makes sense, because they’ve already got control over all these dormant businesses,” he said. “So they’re now busy trying to get unemployment payments and SBA loans in the names of these companies and their employees.”
Hold Security shared data intercepted from the gang that listed the personal and financial details of dozens of companies targeted for ID theft, including Dun & Bradstreet logins the crooks had created for the hijacked businesses. Dun & Bradstreet declined to comment on the matter, other than to say it was working with federal and state authorities to alert affected businesses and state regulators.
Among those targeted was Environmental Safety Consultants Inc. (ESC), a 37-year-old environmental engineering firm based in Bradenton, Fla. ESC owner Scott Russell estimates his company was initially targeted nearly two years ago, and that he first became aware something wasn’t right when he recently began getting calls from Home Depot’s corporate offices inquiring about the company’s delinquent account.
But Russell said he didn’t quite grasp the enormity of the situation until last year, when he was contacted by the manager of a virtual office space across town who told him about a suspiciously large number of deliveries at an office space that was rented out in his name.
Russell had never rented that particular office. Rather, the thieves had done it for him, using his name and the name of his business. The office manager said the deliveries came virtually non-stop, even though there was apparently no business operating within the rented premises. And in each case, shortly after the shipments arrived someone would show up and cart them away.
“She said we don’t think it’s you,” he recalled. “Turns out, they had paid for a lease in my name with someone else’s credit card. She shared with me a copy of the lease, which included a fraudulent ID and even a vehicle insurance card for a Land Cruiser we got rid of like 15 years ago. The application listed our home address with me and some woman who was not my wife’s name.”
The crates and boxes being delivered to his erstwhile office space were mostly computers and other high-priced items ordered from 10 different Office Depot credit cards that also were not in his name.
“The total value of the electronic equipment that was bought and delivered there was something like $75,000,” Russell said, noting that it took countless hours and phone calls with Office Depot to make it clear they would no longer accept shipments addressed to him or his company. “It was quite spine-tingling to see someone penned a lease in the name of my business and personal identity.”
Even though the virtual office manager had the presence of mind to take photocopies of the driver’s licenses presented by the people arriving to pick up the fraudulent shipments, the local police seemed largely uninterested in pursuing the case, Russell said.
“I went to the local county sheriff’s office and showed them all the documentation I had and the guy just yawned and said he’d get right on it,” he recalled. “The place where the office space was rented was in another county, and the detective I spoke to there about it was interested, but he could never get anyone from my county to follow up.”
Russell said he believes the fraudsters initially took out new lines of credit in his company’s name and then used those to defraud others in a similar way. One of those victims is another victim on the gang’s target list obtained by Hold Security — Mary McMahan, owner of Fan Experiences, an event management company in Winter Park, Fla.
McMahan also had stolen goods from Office Depot and other stores purchased in her company’s name and delivered to the same office space rented in Russell’s name. McMahan said she and her businesses have suffered hundreds of thousands of dollars in fraud, and spent nearly as much in legal fees fending off collections firms and restoring her company’s credit.
McMahan said she first began noticing trouble almost four years ago, when someone started taking out new credit cards in her company’s name. At the same time, her business was used to open a new lease on a virtual office space in Florida that also began receiving packages tied to other companies victimized by business ID theft.
“About four years back, they hit my credit hard for a year, getting all these new lines of credit at Home Depot, Office Depot, Office Max, you name it,” she said. “Then they came back again two years ago and hit it hard for another year. They even went to the [Florida Department of Motor Vehicles] to get a driver’s license in my name.”
McMahan said the thieves somehow hacked her DNB account, and then began adding new officers and locations for her business listing.
“They changed the email and mailing address, and even went on Yelp and Google and did the same,” she said.
McMahan said she’s since locked down her personal and business credit to the point where even she would have a tough time getting a new line of credit or mortgage if she tried.
“There’s no way they can even utilize me anymore because there’s so many marks on my credit stating that it’s been stolen” she said. “These guys are relentless, and they recycle victims to defraud others until they figure out they can’t recycle them anymore.”
SAY…THAT’S A NICE CREDIT PROFILE YOU GOT THERE…
McMahan says she, too, has filed multiple reports about the crimes with local police, but has so far seen little evidence that anyone is interested in following up on the matter. For now, she is paying Dun and Bradstreet more than a $100 a month to monitor her business credit profile.
Dun & Bradstreet does offer a free version of credit monitoring called Credit Signal that lets business owners check their business credit scores and any inquiries made in the previous 14 days up to four times a year. However, those looking for more frequent checks or additional information about specific credit inquiries beyond 14 days are steered toward DNB’s subscription-based services.
Eva Velasquez, president of the Identity Theft Resource Center, a California-based nonprofit that assists ID theft victims, said she finds that troubling.
“When we look at these institutions that are necessary for us to operate and function in society and they start to charge us a fee for a service to fix a problem they helped create through their infrastructure, that’s just unconscionable,” Velasquez said. “We need to take a hard look at the infrastructures that businesses are beholden to and make sure the risk minimization protections they’re entitled to are not fee-based — particularly if it’s a problem created by the very infrastructure of the system.”
Velasquez said it’s unfortunate that small business owners don’t have the same protections afforded to consumers. For example, only recently did the three major consumer reporting bureaus allow all U.S. residents to place a freeze on their credit files for free.
“We’ve done a good job in educating the public that anyone can be victim of identity theft, and in compelling our infrastructure to provide robust consumer protection and risk minimization processes that are more uniform,” she said. “It’s still not good by any means, but it’s definitely better for consumers than it is for businesses. We currently put all the responsibility on the small business owner, and very little on the infrastructure and processes that should be designed to protect them but aren’t doing a great job, frankly.”
Rather, the onus continues to be on the business owner to periodically check with DNB and state agencies to monitor for any signs of unauthorized changes. Worse still, too many private and public organizations still don’t do a good enough job protecting employee identification and tax ID numbers that are so often abused in business identity theft, Velasquez said.
“You can put alerts and other protections in place but the problem is you have to go on a department by department and case by case basis,” she said. “The place to begin is your secretary of state’s office or wherever you file your documents to operate your business.
For its part, Dun & Bradstreet recently published a blog post outlining recommendations for businesses to ward off identity thieves. DNB says anyone who suspects fraudulent activity on their account should contact its support team.
In late May, KrebsOnSecurity alerted numerous officials in Florence, Ala. that their information technology systems had been infiltrated by hackers who specialize in deploying ransomware. Nevertheless, on Friday, June 5, the intruders sprang their attack, deploying ransomware and demanding nearly $300,000 worth of bitcoin. City officials now say they plan to pay the ransom demand, in hopes of keeping the personal data of their citizens off of the Internet.
Nestled in the northwest corner of Alabama, Florence is home to roughly 40,000 residents. It is part of a quad-city metropolitan area perhaps best known for the Muscle Shoals Sound Studio that recorded the dulcet tones of many big-name music acts in the 1960s and 70s.
On May 26, acting on a tip from Milwaukee, Wisc.-based cybersecurity firm Hold Security, KrebsOnSecurity contacted the office of Florence’s mayor to alert them that a Windows 10 system in their IT environment had been commandeered by a ransomware gang.
Comparing the information shared by Hold Security dark web specialist Yuliana Bellini with the employee directory on the Florence website indicated the username for the computer that attackers had used to gain a foothold in the network on May 6 belonged to the city’s manager of information systems.
My call was transferred to no fewer than three different people, none of whom seemed eager to act on the information. Eventually, I was routed to the non-emergency line for the Florence police department. When that call went straight to voicemail, I left a message and called the city’s emergency response team.
That last effort prompted a gracious return call the following day from a system administrator for the city, who thanked me for the heads up and said he and his colleagues had isolated the computer and Windows network account Hold Security flagged as hacked.
“I can’t tell you how grateful we are that you helped us dodge this bullet,” the technician said in a voicemail message for this author. “We got everything taken care of now, and some different protocols are in place. Hopefully we won’t have another near scare like we did, and hopefully we won’t have to talk to each other again.”
But on Friday, Florence Mayor Steve Holt confirmed that a cyberattack had shut down the city’s email system. Holt told local news outlets at the time there wasn’t any indication that ransomware was involved.
However, in an interview with KrebsOnSecurity Tuesday, Holt acknowledged the city was being extorted by DoppelPaymer, a ransomware gang with a reputation for negotiating some of the highest extortion payments across dozens of known ransomware families.
Holt said the same gang appears to have simultaneously compromised networks belonging to four other victims within an hour of Florence, including another municipality that he declined to name. Holt said the extortionists initially demanded 39 bitcoin (~USD $378,000), but that an outside security firm hired by the city had negotiated the price down to 30 bitcoin (~USD $291,000).
Like many other cybercrime gangs operating these days, DoppelPaymer will steal reams of data from victims prior to launching the ransomware, and then threaten to publish or sell the data unless a ransom demand is paid.
Holt told KrebsOnSecurity the city can’t afford to see its citizens’ personal and financial data jeopardized by not paying.
“Do they have our stuff? We don’t know, but that’s the roll of the dice,” Holt said.
Steve Price, the Florence IT manager whose Microsoft Windows credentials were stolen on May 6 by a DHL-themed phishing attack and used to further compromise the city’s network, explained that following my notification on May 26 the city immediately took a number of preventative measures to stave off a potential ransomware incident. Price said that when the ransomware hit, they were in the middle of trying to get city leaders to approve funds for a more thorough investigation and remediation.
“We were trying to get another [cybersecurity] response company involved, and that’s what we were trying to get through the city council on Friday when we got hit,” Price said. “We feel like we can build our network back, but we can’t undo things if peoples’ personal information is released.”
Fabian Wosar, chief technology officer at Emsisoft, said organizations need to understand that the only step which guarantees a malware infestation won’t turn into a full-on ransomware attack is completely rebuilding the compromised network — including email systems.
“There is a misguided belief that if you were compromised you can get away with anything but a complete rebuild of the affected networks and infrastructure,” Wosar said, noting that it’s not uncommon for threat actors to maintain control even as a ransomware victim organization is restoring their systems from backups.
“They often even demonstrate that they still ‘own’ the network by publishing screenshots of messages talking about the incident,” Wosar said.
Hold Security founder Alex Holden said Florence’s situation is all too common, and that very often ransomware purveyors are inside a victim’s network for weeks or months before launching their malware.
“We often get glimpses of the bad guys beginning their assaults against computer networks and we do our best to let the victims know about the attack,” Holden said. “Since we can’t see every aspect of the attack we advise victims to conduct a full investigation of the events, based on the evidence collected. But when we deal with sensitive situations like ransomware, timing and precision are critical. If the victim will listen and seek out expert opinions, they have a great chance of successfully stopping the breach before it turns into ransom.”
In January 2019, dozens of media outlets raised the alarm about a new “megabreach” involving the release of some 773 million stolen usernames and passwords that was breathlessly labeled “the largest collection of stolen data in history.” A subsequent review by KrebsOnSecurity quickly determined the data was years old and merely a compilation of credentials pilfered from mostly public data breaches. Earlier today, authorities in Ukraine said they’d apprehended a suspect in the case.
The Security Service of Ukraine (SBU) on Tuesday announced the detention of a hacker known as Sanix (a.k.a. “Sanixer“) from the Ivano-Frankivsk region of the country. The SBU said they found on Sanix’s computer records showing he sold databases with “logins and passwords to e-mail boxes, PIN codes for bank cards, e-wallets of cryptocurrencies, PayPal accounts, and information about computers hacked for further use in botnets and for organizing distributed denial-of-service (DDoS) attacks.”
Sanix became famous last year for posting to hacker forums that he was selling the 87GB password dump, labeled “Collection #1.” Shortly after his sale was first detailed by Troy Hunt, who operates the HaveIBeenPwned breach notification service, KrebsOnSecurity contacted Sanix to find out what all the fuss was about. From that story:
“Sanixer said Collection#1 consists of data pulled from a huge number of hacked sites, and was not exactly his ‘freshest’ offering. Rather, he sort of steered me away from that archive, suggesting that — unlike most of his other wares — Collection #1 was at least 2-3 years old. His other password packages, which he said are not all pictured in the above screen shot and total more than 4 terabytes in size, are less than a year old, Sanixer explained.”
Alex Holden, chief technology officer and founder of Milwaukee-based Hold Security, said Sanixer’s claim to infamy was simply for disclosing the Collection #1 data, which was just one of many credential dumps amalgamated by other cyber criminals.
“Today, it is even a more common occurrence to see mixing new and old breached credentials,” Holden said. “In fact, large aggregations of stolen credentials have been around since 2013-2014. Even the original attempt to sell the Yahoo breach data was a large mix of several previous unrelated breaches. Collection #1 was one of many credentials collections output by various cyber criminals gangs.”
Sanix was far from a criminal mastermind, and left a long trail of clues that made it almost child’s play to trace his hacker aliases to the real-life identity of a young man in Burshtyn, a city located in Ivano-Frankivsk Oblast in western Ukraine.
Still, perhaps Ukraine’s SBU detained Sanix for other reasons in addition to his peddling of Collection 1. According to cyber intelligence firm Intel 471, Sanix has stayed fairly busy selling credentials that would allow customers to remotely access hacked resources at several large organizations. For example, as recently as earlier this month, Intel 471 spotted Sanix selling access to nearly four dozen universities worldwide, and to a compromised VPN account for the government of San Bernadino, Calif.
KrebsOnSecurity is covering Sanix’s detention mainly to close the loop on an incident that received an incredible amount of international attention. But it’s also another excuse to remind readers about the importance of good password hygiene. A core reason so many accounts get compromised is that far too many people have the nasty habit(s) of choosing poor passwords, re-using passwords and email addresses across multiple sites, and not taking advantage of multi-factor authentication options when available.
By far the most important passwords are those protecting our email inbox(es). That’s because in nearly all cases, the person who is in control of that email address can reset the password of any services or accounts tied to that email address – merely by requesting a password reset link via email. For more on this dynamic, please see The Value of a Hacked Email Account.
And instead of thinking about passwords, consider using unique, lengthy passphrases — collections of words in an order you can remember — when a site allows it. In general, a long, unique passphrase takes far more effort to crack than a short, complex one. Unfortunately, many sites do not let users choose passwords or passphrases that exceed a small number of characters, or they will otherwise allow long passphrases but ignore anything entered after the character limit is reached.
If you are the type of person who likes to re-use passwords, then you definitely need to be using a password manager, which helps you pick and remember strong and unique passwords/passphrases and essentially lets you use the same strong master password/passphrase across all Web sites.
Finally, if you haven’t done so lately, mosey on over to twofactorauth.org and see if you are taking full advantage of the strongest available multi-factor authentication option at sites you trust with your data. The beauty of multi-factor is that even if thieves manage to guess or steal your password just because they hacked some Web site, that password will be useless to them unless they can also compromise that second factor — be it your mobile device, phone number, or security key. Not saying these additional security methods aren’t also vulnerable to compromise (they absolutely are), but they’re definitely better than just using a password.
Security experts are poring over thousands of new Coronavirus-themed domain names registered each day, but this often manual effort struggles to keep pace with the flood of domains invoking the virus to promote malware and phishing sites, as well as non-existent healthcare products and charities. As a result, domain name registrars are under increasing pressure to do more to combat scams and misinformation during the COVID-19 pandemic.
By most measures, the volume of new domain registrations that include the words “Coronavirus” or “Covid” has closely tracked the spread of the deadly virus. The Cyber Threat Coalition (CTC), a group of several thousand security experts volunteering their time to fight COVID-related criminal activity online, recently published data showing the rapid rise in new domains began in the last week of February, around the same time the Centers for Disease Control began publicly warning that a severe global pandemic was probably inevitable.
“Since March 20th, the number of risky domains registered per day has been decreasing, with a notable spike around March 30th,” wrote John Conwell, principal data scientist at DomainTools [an advertiser on this site]. “Interestingly, legitimate organizations creating domains in response to the COVID-19 crisis were several weeks behind the curve from threat actors trying to take advantage of this situation. This is a pattern DomainTools hasn’t seen before in other crises.”
Security vendor Sophos looked at telemetry from customer endpoints to illustrate the number of new COVID-related domains that actually received traffic of late. As the company noted, one challenge in identifying potentially malicious domains is that many of them can sit dormant for days or weeks before being used for anything.
“We can see a rapid and dramatic increase of visits to potentially malicious domains exploiting the Coronavirus pandemic week over week, beginning in late February,” wrote Sophos’ Rich Harang. “Even though still a minority of cyber threats use the pandemic as a lure, some of these new domains will eventually be used for malicious purposes.”
CTC spokesman Nick Espinosa said the first spike in visits was on February 25, when group members saw about 4,000 visits to the sites they were tracking.
“The following two weeks starting on March 9 saw rapid growth, and from March 23 onwards we’re seeing between 75,000 to 130,000 visits per weekday, and about 40,000 on the weekends,” Espinosa said. “Looking at the data collected, the pattern of visits are highest on Monday and Friday, and the lowest visit count is on the weekend. Our data shows that there were virtually no customer hits on COVID-related domains prior to February 23.”
Milwaukee-based Hold Security has been publishing daily and weekly lists of all COVID-19 related domain registrations (without any scoring assigned). Here’s a graph KrebsOnSecurity put together based on that data set, which also shows a massive spike in new domain registrations in the third week of March, trailing off considerably over the past couple of weeks.
Not everyone is convinced we’re measuring the right things, or that the current measurements are accurate. Neil Schwartzman, executive director of the anti-spam group CAUCE, said he believes DomainTool’s estimates on the percentage of new COVID/Coronavirus-themed domains that are malicious are too high, and that many are likely benign and registered by well-meaning people seeking to share news or their own thoughts about the outbreak.
“But there’s the rub,” he said. “Bad guys get to hide amidst the good really effectively, so each one needs to be reviewed on its own. And that’s a substantial amount of work.”
At the same time, Schwartzman said, focusing purely on domains may obscure the true size and scope of the overall threat. That’s because scammers very often will establish multiple subdomains for each domain, meaning that a single COVID-related new domain registration could eventually be tied to a number of different scammy or malicious sites.
Subdomains can not only make phishing domains appear more legitimate, but they also tend to lengthen the domain so that key parts of it get pushed off the URL bar in mobile browsers.
To that end, he said, it makes perhaps the most sense to focus on new domain registrations that have encryption certificates tied to them, since the issuance of an SSL certificate for a domain is usually a sign that it is about to be put to use. As noted in previous stories here, roughly 75 percent of all phishing sites now have the padlock (start with “https://”), mainly because the major Web browsers display security alerts on sites that don’t.
Schwartzman said more domain registrars should follow the example of Los Angeles-based Namecheap Inc., which last month pledged to stop accepting the automated registration of website names that include words or phrases tied to the COVID-19 pandemic. Since then, a handful of other registrars have said they plan to manually review all such registrations going forward.
The Internet Corporation for Assigned Names and Numbers (ICANN), the organization that oversees the registrar industry, recently sent a letter urging registrars to be more proactive, but stopped short of mandating any specific actions.
Schwartzman called ICANN’s response “weak tea.”
“It’s absolutely ludicrous that ICANN hasn’t stepped up, and they will bear significant responsibility for any deaths that may happen as a result of all this,” Schwartzman said. “This is a CYA response at best, and dictates to no one that they should do anything.”
Michael Daniel, president of the Cyber Threat Alliance — a cybersecurity industry group that’s also been working to fight COVID-19 related fraud — agreed, saying more pressure needs to be applied to the registrar community.
“It’s really hard to do anything about this unless the registrars step up and do something on their own,” Daniel said. “It’s either that or the government gets involved. That doesn’t mean some [registrars] aren’t doing what they can, but in general what the industry is doing is nowhere near as fast as the bad guys are generating these domains.”
The U.S. government may well soon get more involved. Earlier this week, Senators Cory Booker (D-N.J.), Maggie Hassan (D-N.H.) and Mazie K. Hirono (D-Hawaii) sent letters to eight domain name company leaders, demanding to know what they were doing to combat the threat of malicious domains, and urging them to do more.
“As cybercriminals and other malevolent actors seek to take advantage of the Coronavirus pandemic, it is critical that domain name registrars like yours (1) exercise diligence and ensure that only legitimate organizations can register Coronavirus-related domain names and domain names referencing online communications platforms; (2) act quickly to suspend, cancel, or terminate registrations for domains that are involved in unlawful or harmful activity; and (3) cooperate with law enforcement to help bring to justice cybercriminals profiting from the Coronavirus pandemic,” the senators wrote.
With many people being laid off or working from home thanks to the Coronavirus pandemic, cybercrooks are almost certain to have more than their usual share of recruitable “money mules” — people who get roped into money laundering schemes under the pretense of a work-at-home job offer. Here’s the story of one upstart mule factory that spoofs a major nonprofit and tells new employees they’ll be collecting and transmitting donations for an international “Coronavirus Relief Fund.”
On the surface, the Web site for the Vasty Health Care Foundation certainly looks legitimate. It includes various sections on funding relief efforts around the globe, explaining that it “connects nonprofits, donors, and companies in nearly every country around the world.” The site says it’s a nonprofit with offices based in Nebraska and Quebec, Canada.
The “Vasty Health Care Foundation” is one of several fraudulent Web sites that recruit money mules in the name of helping Coronavirus victims. The content on Vasty’s site was lifted almost entirely from globalgiving.org, a legitimate charity that actually is trying to help people affected by the pandemic.
“We have been contacted by job seekers asking if we are related to some of these job opportunities they’ve been finding on Indeed.com and Monster.com,” said Kevin Conroy, chief product officer at GlobalGiving. “And we always tell them no that’s not from us, and not to cash any checks someone may be giving them in relation to those offers.”
The Vasty domain — vastyhealthcarefoundation[.]com — was registered just weeks ago, although the site claims its organization has been around for years.
The crooks behind this scheme also seem to have submitted the Vasty name in custom links at vetting sites like The Better Business Bureau and Guidestar that ultimately take one to a summary of data on GlobalGiving. No doubt this is part of an effort to lend legitimacy to the Vasty name (hovering over the links above reveals the trickery).
What proof is there that Vasty isn’t a legitimate charity? None of the dozens of Canadian mules contacted by this author responded to requests for comment. But KrebsOnSecurity received copious amounts of information about this scam from Milwaukee, Wisc. based Hold Security, which managed to intercept key file exchanges between threat actors through public file sharing services.
Among those files were a set of form letters and boilerplate email messages that describe the ideal candidate for the job at Vasty and welcome new recruits to the Vasty payroll. Here’s a look at part of the job description, which includes (not pictured) a description of the healthcare plans and other benefits allegedly offered to Vasty employees.
After congratulating applicants (everyone who applies is “hired”) on their new positions, Vasty asks the recruits to do some busy work. In this case, new hires are sent to local pharmacies on some bogus errand, such as to inspect the pricing of face masks and hand sanitizer products for price-gouging.
“Now we have the first task for you. You will have to perform a trip within your city. So that we can compensate for transportation costs along with your hourly rate, I ask you to keep receipts confirming your expenses.
LOCATION: Sam’s Geneva Street Pharmacy
ADDRESS: 284 Geneva St, St. Catharines, ON L2N 2E8
I ask you to go to the pharmacy at the specified address. We are increasingly receiving reports of private sellers violating the pricing policy for products such as: aspirin, face masks are loose surgical masks with elastic loops that go around the ears, hand sanitizers.”
New recruits are then asked to assemble and submit a written report of their observations at the store in question.
These types of menial, meaningless tasks are a typical tactic of money mule recruitment schemes and they serve two main purposes: They separate out slackers from people who really need and want a job, and they help the employee feel like he’s doing something useful and legitimate (aside from just moving money around, which if brought up too soon might make him question whether the job is legit).
Eventually, after successfully completing one or more of these busy work tasks, the new hire is asked to process a “donation” from someone who wants to help fight the Coronavirus outbreak:
“Please read the instructions carefully. One donor wants to make donations to help fight the coronavirus. As you know, this is a big problem for most countries of the world. Every day we receive information from the World Health Organization that more and more people are sick. Quite a lot of people died from this virus. Some people simply don’t have enough funds to provide themselves with standard face masks and disinfectants to fight the virus.”
“The donor requests that Bitcoins be bought with his funds. For this task, you need to create your Bitcoin wallet, or use the QR code that we send you in this letter. You will receive from the donor up to 3000 CAD. Your commission up to 150 CAD will be included in this amount to cover your expenses. I remind you that you do not need to use your funds to buy bitcoins. The funds will be sent to you. You will need to receive cash atm or at your bank branch.”
What happens next is the employee then receives an electronic transfer of money into his bank account, is asked to withdraw the cash, and to keep 150 Canadian dollars for himself. He’s then instructed to take the remainder of the funds to a Bitcoin ATM and scan an emailed QR code with his mobile phone. This causes the cash he deposits into the Bitcoin ATM to be sent in an irreversible transaction to a Bitcoin wallet controlled by the scammers.
What’s going on behind the scenes is the funds that get deposited in the employee’s account are invariably stolen from other hacked bank accounts, and the employee is merely helping the crooks launder the stolen money into a form of payment that can’t be reversed.
Another boilerplate email intercepted by Hold Security shows Vasty’s new hires manager offering advice to employees who are asked by nosey bank employees about the nature of the funds withdrawal.
“Important: If you receive any questions from the bank regarding the purpose of the payment, you can open part of the instructions if necessary and inform that these funds are intended for payment of medicines. In any case, it is a personal payment and it will not be taxed. However, I strongly recommend that you not divulge the rest of the instructions for paying for medicines against coronavirus so as not to aggravate panic among the population.”
Americans shouldn’t feel left out of the scam: Hold Security founder Alex Holden says his analysts also intercepted a nearly identical set of scam templates targeting job seekers in the United States.
Money mule scammers specialize in hacking employer accounts at job recruitment Web sites like Monster.com, Hotjobs.com and other popular employment search services. Armed with the employer accounts, the crooks are free to search through millions of resumes and reach out to people who are currently between jobs or seeking part-time employment.
If you receive a job solicitation via email that sounds too-good-to-be-true, it probably is related in some way to one of these money-laundering schemes. Even if you can’t see the downside to you, someone is likely getting ripped off. Also, know that money mules — however unwitting — may find themselves in hot water with local police, and may be asked by their bank to pay back funds that were illegally transferred into the mules’ account.
Overall, Holden said, established cybercriminals who specialize in recruiting and grooming money mules for financial crimes have been cooing of late over the potential glut of new mules. One mule vendor on a popular Russian-language crime forum posted Tuesday that his “drops” — the hacker slang term for money mules — weren’t scared of Coronavirus concerns.
“We got drops in masks!,” one vendor proclaimed.
“We continue to work despite the Coronavirus,” declared another drops vendor.
Any readers interested in helping others affected by the Coronavirus outbreak should consider giving through the organization Vasty is impersonating here; Global Giving. Alternatively, these two stories link to a number of other reputable organizations facilitating Coronavirus relief efforts.
Patch comes amid active exploitation by ransomware gangs
Networking hardware vendor Zyxel today released an update to fix a critical flaw in many of its network attached storage (NAS) devices that can be used to remotely commandeer them. The patch comes 12 days after KrebsOnSecurity alerted the company that precise instructions for exploiting the vulnerability were being sold for $20,000 in the cybercrime underground.
Based in Taiwan, Zyxel Communications Corp. (a.k.a “ZyXEL”) is a maker of networking devices, including Wi-Fi routers, NAS products and hardware firewalls. The company has roughly 1,500 employees and boasts some 100 million devices deployed worldwide. While in many respects the class of vulnerability addressed in this story is depressingly common among Internet of Things (IoT) devices, the flaw is notable because it has attracted the interest of groups specializing in deploying ransomware at scale.
KrebsOnSecurity first learned about the flaw on Feb. 12 from Alex Holden, founder of Milwaukee-based security firm Hold Security. Holden had obtained a copy of the exploit code, which allows an attacker to remotely compromise more than a dozen types of Zyxel NAS products remotely without any help from users.
Holden said the seller of the exploit code — a ne’er-do-well who goes by the nickname “500mhz” –is known for being reliable and thorough in his sales of 0day exploits (a.k.a. “zero-days,” these are vulnerabilities in hardware or software products that vendors first learn about when exploit code and/or active exploitation shows up online).
For example, this and previous zero-days for sale by 500mhz came with exhaustive documentation detailing virtually everything about the flaw, including any preconditions needed to exploit it, step-by-step configuration instructions, tips on how to remove traces of exploitation, and example search links that could be used to readily locate thousands of vulnerable devices.
500mhz’s profile on one cybercrime forum states that he is constantly buying, selling and trading various 0day vulnerabilities.
“In some cases, it is possible to exchange your 0day with my existing 0day, or sell mine,” his Russian-language profile reads.
KrebsOnSecurity first contacted Zyxel on Feb. 12, sharing a copy of the exploit code and description of the vulnerability. When four days elapsed without any response from the vendor to notifications sent via multiple methods, this author shared the same information with vulnerability analysts at the U.S. Department of Homeland Security (DHS) and with the CERT Coordination Center (CERT/CC), a partnership between DHS and Carnegie Mellon University.
Less than 24 hours after contacting DHS and CERT/CC, KrebsOnSecurity heard back from Zyxel, which thanked KrebsOnSecurity for the alert without acknowledging its failure to respond until they were sent the same information by others.
“Thanks for flagging,” Zyxel’s team wrote on Feb. 17. “We’ve just received an alert of the same vulnerabilities from US-CERT over the weekend, and we’re now in the process of investigating. Still, we heartily appreciate you bringing it to our attention.”
Earlier today, Zyxel sent a message saying it had published a security advisory and patch for the zero-day exploit in some of its affected products. The vulnerable devices include NAS542, NAS540, NAS520, NAS326, NSA325 v2, NSA325, NSA320S, NSA320, NSA310S, NSA310, NSA221, NSA220+, NSA220, and NSA210. The flaw is designated as CVE-2020-9054.
However, many of these devices are no longer supported by Zyxel and will not be patched. Zyxel’s advice for those users is simply “do not leave the product directly exposed to the internet.”
“If possible, connect it to a security router or firewall for additional protection,” the advisory reads.
Holden said given the simplicity of the exploit — which allows an attacker to seize remote control over an affected device by injecting just two characters to the username field of the login panel for Zyxel NAS devices — it’s likely other Zyxel products may have related vulnerabilities.
“Considering how stupid this exploit is, I’m guessing this is not the only one of its class in their products,” he said.
CERT’s advisory on the flaw rates it at a “10” — its most severe. The advisory includes additional mitigation instructions, including a proof-of-concept exploit that has the ability to power down affected Zyxel devices.
EMOTET GOES IOT?
Holden said recent activity suggests that attackers known for deploying ransomware have been actively working to test the zero-day for use against targets. Specifically, Holden said the exploit is now being used by a group of bad guys who are seeking to fold the exploit into Emotet, a powerful malware tool typically disseminated via spam that is frequently used to seed a target with malcode which holds the victim’s files for ransom.
Holden said 500mhz was offering the Zyxel exploit for $20,000 on cybercrime forums, although it’s not clear whether the Emotet gang paid anywhere near that amount for access to the code. Still, he said, ransomware gangs could easily earn back their investment by successfully compromising a single target with this simple but highly reliable exploit.
“From the attacker’s standpoint simple is better,” he said. “The commercial value of this exploit was set at $20,000, but that’s not much when you consider a ransomware gang could easily make that money back and then some in a short period of time.”
Emotet’s nascent forays into IoT come amid other disturbing developments for the prolific exploitation platform. Earlier this month, security researchers noted that Emotet now has the capability to spread in a worm-like fashion via Wi-Fi networks.
“To me, a 0day exploit in Zyxel is not as scary as who bought it,” he said. “The Emotet guys have been historically targeting PCs, laptops and servers, but their venture now into IoT devices is very disturbing.”
This experience was a good reminder that vulnerability reporting and remediation often can be a frustrating process. Twelve days turnaround is fairly quick as these things go, although probably not quick enough for customers using products affected by zero-day vulnerabilities.
It can be tempting when one is not getting any response from a vendor to simply publish an alert detailing one’s findings, and the pressure to do so certainly increases when there is a zero-day flaw involved. KrebsOnSecurity ultimately opted not to do that for three reasons.
Firstly, at the time there was no evidence that the flaws were being actively exploited, and because the vendor had assured DHS and CERT-CC that it would soon have a patch available.
Perhaps most importantly, public disclosure of an unpatched flaw could well have made a bad situation worse, without offering affected users much in the way of information about how to protect their systems.
Many hardware and software vendors include a link from their home pages to /security.txt, which is a proposed standard for allowing security researchers to quickly identify the points of contact at vendors when seeking to report security vulnerabilities. But even vendors who haven’t yet adopted this standard (Zyxel has not) usually will respond to reports at [email protected][vendordomainhere]; indeed, Zyxel encourages researchers to forward any such reports to [email protected]
On the subject of full disclosure, I should note that while this author is listed by Hold Security’s site as an advisor, KrebsOnSecurity has never sought nor received remuneration of any kind in connection with this role.
Organizations in the throes of cleaning up after a ransomware outbreak typically will change passwords for all user accounts that have access to any email systems, servers and desktop workstations within their network. But all too often, ransomware victims fail to grasp that the crooks behind these attacks can and frequently do siphon every single password stored on each infected endpoint. The result of this oversight may offer attackers a way back into the affected organization, access to financial and healthcare accounts, or — worse yet — key tools for attacking the victim’s various business partners and clients.
In mid-November 2019, Wisconsin-based Virtual Care Provider Inc. (VCPI) was hit by the Ryuk ransomware strain. VCPI manages the IT systems for some 110 clients that serve approximately 2,400 nursing homes in 45 U.S. states. VCPI declined to pay the multi-million dollar ransom demanded by their extortionists, and the attack cut off many of those elder care facilities from their patient records, email and telephone service for days or weeks while VCPI rebuilt its network.
Just hours after that story was published, VCPI chief executive and owner Karen Christianson reached out to say she hoped I would write a follow-up piece about how they recovered from the incident. My reply was that I’d consider doing so if there was something in their experience that I thought others could learn from their handling of the incident.
I had no inkling at the time of how much I would learn in the days ahead.
On December 3, I contacted Christianson to schedule a follow-up interview for the next day. On the morning of Dec. 4 (less than two hours before my scheduled call with VCPI and more than two weeks after the start of their ransomware attack) I heard via email from someone claiming to be part of the criminal group that launched the Ryuk ransomware inside VCPI.
That email was unsettling because its timing suggested that whoever sent it somehow knew I was going to speak with VCPI later that day. This person said they wanted me to reiterate a message they’d just sent to the owner of VCPI stating that their offer of a greatly reduced price for a digital key needed to unlock servers and workstations seized by the malware would expire soon if the company continued to ignore them.
“Maybe you chat to them lets see if that works,” the email suggested.
The anonymous individual behind that communication declined to provide proof that they were part of the group that held VPCI’s network for ransom, and after an increasingly combative and personally threatening exchange of messages soon stopped responding to requests for more information.
“We were bitten with releasing evidence before hence we have stopped this even in our ransoms,” the anonymous person wrote. “If you want proof we have hacked T-Systems as well. You may confirm this with them. We havent [sic] seen any Media articles on this and as such you should be the first to report it, we are sure they are just keeping it under wraps.” Security news site Bleeping Computer reported on the T-Systems Ryuk ransomware attack on Dec. 3.
In our Dec. 4 interview, VCPI’s acting chief information security officer — Mark Schafer, CISO at Wisconsin-based SVA Consulting — confirmed that the company received a nearly identical message that same morning, and that the wording seemed “very similar” to the original extortion demand the company received.
However, Schafer assured me that VCPI had indeed rebuilt its email network following the intrusion and strictly used a third-party service to discuss remediation efforts and other sensitive topics.
‘LIKE A COMPANY BATTLING A COUNTRY’
Christianson said several factors stopped the painful Ryuk ransomware attack from morphing into a company-ending event. For starters, she said, an employee spotted suspicious activity on their network in the early morning hours of Saturday, Nov. 16. She said that employee then immediately alerted higher-ups within VCPI, who ordered a complete and immediate shutdown of the entire network.
“The bottom line is at 2 a.m. on a Saturday, it was still a human being who saw a bunch of lights and had enough presence of mind to say someone else might want to take a look at this,” she said. “The other guy he called said he didn’t like it either and called the [chief information officer] at 2:30 a.m., who picked up his cell phone and said shut it off from the Internet.”
Schafer said another mitigating factor was that VCPI had contracted with a third-party roughly six months prior to the attack to establish off-site data backups that were not directly connected to the company’s infrastructure.
“The authentication for that was entirely separate, so the lateral movement [of the intruders] didn’t allow them to touch that,” Schafer said.
Schafer said the move to third-party data backups coincided with a comprehensive internal review that identified multiple areas where VCPI could harden its security, but that the attack hit before the company could complete work on some of those action items.
“We did a risk assessment which was pretty much spot-on, we just needed more time to work on it before we got hit,” he said. “We were doing the right things, just not fast enough. If we’d had more time to prepare, it would have gone better. I feel like we were a company battling a country. It’s not a fair fight, and once you’re targeted it’s pretty tough to defend.”
WHOLESALE PASSWORD THEFT
Just after receiving a tip from a reader about the ongoing Ryuk infestation at VCPI, KrebsOnSecurity contacted Milwaukee-based Hold Security to see if its owner Alex Holden had any more information about the attack. Holden and his team had previously intercepted online traffic between and among multiple ransomware gangs and their victims, and I was curious to know if that held true in the VCPI attack as well.
Sure enough, Holden quickly sent over several logs of data suggesting the attackers had breached VCPI’s network on multiple occasions over the previous 14 months.
“While it is clear that the initial breach occurred 14 months ago, the escalation of the compromise didn’t start until around November 15th of this year,” Holden said at the time. “When we looked at this in retrospect, during these three days the cybercriminals slowly compromised the entire network, disabling antivirus, running customized scripts, and deploying ransomware. They didn’t even succeed at first, but they kept trying.”
Holden said it appears the intruders laid the groundwork for the VPCI using Emotet, a powerful malware tool typically disseminated via spam.
“Emotet continues to be among the most costly and destructive malware,” reads a July 2018 alert on the malware from the U.S. Department of Homeland Security. “Its worm-like features result in rapidly spreading network-wide infection, which are difficult to combat.”
According to Holden, after using Emotet to prime VCPI’s servers and endpoints for the ransomware attack, the intruders deployed a module of Emotet called Trickbot, which is a banking trojan often used to download other malware and harvest passwords from infected systems.
Indeed, Holden shared records of communications from VCPI’s tormentors suggesting they’d unleashed Trickbot to steal passwords from infected VCPI endpoints that the company used to log in at more than 300 Web sites and services, including:
-Identity and password management platforms Auth0 and LastPass
-Multiple personal and business banking portals;
-Microsoft Office365 accounts
-Direct deposit and Medicaid billing portals
-Cloud-based health insurance management portals
-Numerous online payment processing services
-Cloud-based payroll management services
-Prescription management services
-Commercial phone, Internet and power services
-Medical supply services
-State and local government competitive bidding portals
-Online content distribution networks
-Shipping and postage accounts
-Amazon, Facebook, LinkedIn, Microsoft, Twitter accounts
Toward the end of my follow-up interview with Schafer and VCPI’s Christianson, I shared Holden’s list of sites for which the attackers had apparently stolen internal company credentials. At that point, Christianson abruptly ended the interview and got off the line, saying she had personal matters to attend to. Schafer thanked me for sharing the list, noting that it looked like VCPI probably now had a “few more notifications to do.”
Moral of the story: Companies that experience a ransomware attack — or for that matter any type of equally invasive malware infestation — should assume that all credentials stored anywhere on the local network (including those saved inside Web browsers and password managers) are compromised and need to be changed.
Out of an abundance of caution, this process should be done from a pristine (preferably non-Windows-based) system that does not reside within the network compromised by the attackers. In addition, full use should be made of the strongest method available for securing these passwords with multi-factor authentication.
A ransomware outbreak has besieged a Wisconsin based IT company that provides cloud data hosting, security and access management to more than 100 nursing homes across the United States. The ongoing attack is preventing these care centers from accessing crucial patient medical records, and the IT company’s owner says she fears this incident could soon lead not only to the closure of her business, but also to the untimely demise of some patients.
Milwaukee, Wisc. based Virtual Care Provider Inc. (VCPI) provides IT consulting, Internet access, data storage and security services to some 110 nursing homes and acute-care facilities in 45 states. All told, VCPI is responsible for maintaining approximately 80,000 computers and servers that assist those facilities.
At around 1:30 a.m. CT on Nov. 17, unknown attackers launched a ransomware strain known as Ryuk inside VCPI’s networks, encrypting all data the company hosts for its clients and demanding a whopping $14 million ransom in exchange for a digital key needed to unlock access to the files. Ryuk has made a name for itself targeting businesses that supply services to other companies — particularly cloud-data firms — with the ransom demands set according to the victim’s perceived ability to pay.
In an interview with KrebsOnSecurity today, VCPI chief executive and owner Karen Christianson said the attack had affected virtually all of their core offerings, including Internet service and email, access to patient records, client billing and phone systems, and even VCPI’s own payroll operations that serve nearly 150 company employees.
The care facilities that VCPI serves access their records and other systems outsourced to VCPI by using a Citrix-based virtual private networking (VPN) platform, and Christianson said restoring customer access to this functionality is the company’s top priority right now.
“We have employees asking when we’re going to make payroll,” Christianson said. “But right now all we’re dealing with is getting electronic medical records back up and life-threatening situations handled first.”
Christianson said her firm cannot afford to pay the ransom amount being demanded — roughly $14 million worth of Bitcoin — and said some clients will soon be in danger of having to shut their doors if VCPI can’t recover from the attack.
“We’ve got some facilities where the nurses can’t get the drugs updated and the order put in so the drugs can arrive on time,” she said. “In another case, we have this one small assisted living place that is just a single unit that connects to billing. And if they don’t get their billing into Medicaid by December 5, they close their doors. Seniors that don’t have family to go to are then done. We have a lot of [clients] right now who are like, ‘Just give me my data,’ but we can’t.”
The ongoing incident at VCPI is just the latest in a string of ransomware attacks against healthcare organizations, which typically operate on razor thin profit margins and have comparatively little funds to invest in maintaining and securing their IT systems.
Earlier this week, a 1,300-bed hospital in France was hit by ransomware that knocked its computer systems offline, causing “very long delays in care” and forcing staff to resort to pen and paper.
On Nov. 20, Cape Girardeau, Mo.-based Saint Francis Healthcare System began notifying patients about a ransomware attack that left physicians unable to access medical records prior to Jan. 1.
Tragically, there is evidence to suggest that patient outcomes can suffer even after the dust settles from a ransomware infestation at a healthcare provider. New research indicates hospitals and other care facilities that have been hit by a data breach or ransomware attack can expect to see an increase in the death rate among certain patients in the following months or years because of cybersecurity remediation efforts.
Researchers at Vanderbilt University‘s Owen Graduate School of Management took the Department of Health and Human Services (HHS) list of healthcare data breaches and used it to drill down on data about patient mortality rates at more than 3,000 Medicare-certified hospitals, about 10 percent of which had experienced a data breach.
Their findings suggest that after data breaches as many as 36 additional deaths per 10,000 heart attacks occurred annually at the hundreds of hospitals examined. The researchers concluded that for care centers that experienced a breach, it took an additional 2.7 minutes for suspected heart attack patients to receive an electrocardiogram.
Companies hit by the Ryuk ransomware all too often are compromised for months or even years before the intruders get around to mapping out the target’s internal networks and compromising key resources and data backup systems. Typically, the initial infection stems from a booby-trapped email attachment that is used to download additional malware — such as Trickbot and Emotet.
In this case, there is evidence to suggest that VCPI was compromised by one (or both) of these malware strains on multiple occasions over the past year. Alex Holden, founder of Milwaukee-based cyber intelligence firm Hold Security, showed KrebsOnSecurity information obtained from monitoring dark web communications which suggested the initial intrusion may have begun as far back as September 2018.
Holden said the attack was preventable up until the very end when the ransomware was deployed, and that this attack once again shows that even after the initial Trickbot or Emotet infection, companies can still prevent a ransomware attack. That is, of course, assuming they’re in the habit of regularly looking for signs of an intrusion.
“While it is clear that the initial breach occurred 14 months ago, the escalation of the compromise didn’t start until around November 15th of this year,” Holden said. “When we looked at this in retrospect, during these three days the cybercriminals slowly compromised the entire network, disabling antivirus, running customized scripts, and deploying ransomware. They didn’t even succeed at first, but they kept trying.”
VCPI’s CEO said her organization plans to publicly document everything that has happened so far when (and if) this attack is brought under control, but for now the company is fully focused on rebuilding systems and restoring operations, and on keeping clients informed at every step of the way.
“We’re going to make it part of our strategy to share everything we’re going through,” Christianson said, adding that when the company initially tried several efforts to sidestep the intruders their phone systems came under concerted assault. “But we’re still under attack, and as soon as we can open, we’re going to document everything.”
Orvis, a Vermont-based retailer that specializes in high-end fly fishing equipment and other sporting goods, leaked hundreds of internal passwords on Pastebin.com for several weeks last month, exposing credentials the company used to manage everything from firewalls and routers to administrator accounts and database servers, KrebsOnSecurity has learned. Orvis says the exposure was inadvertent, and that many of the credentials were already expired.
Based in Sunderland, VT. and founded in 1856, privately-held Orvis is the oldest mail-order retailer in the United States. The company has approximately 1,700 employees, 69 retail stores and 10 outlets in the US, and 18 retail stores in the UK.
In late October, this author received a tip from Wisconsin-based security firm Hold Security that a file containing a staggering number of internal usernames and passwords for Orvis had been posted to Pastebin.
Reached for comment about the source of the document, Orvis spokesperson Tucker Kimball said it was only available for a day before the company had it removed from Pastebin.
“The file contains old credentials, so many of the devices associated with the credentials are decommissioned and we took steps to address the remaining ones,” Kimball said. “We are leveraging our existing security tools to conduct an investigation to determine how this occurred.”
However, according to Hold Security founder Alex Holden, this enormous passwords file was actually posted to Pastebin on two separate occasions last month, the first being on Oct. 4, and the second Oct. 22. That finding was corroborated by 4iq.com, a company that aggregates information from leaked databases online.
Orvis did not respond to follow-up requests for comment via phone and email; the last two email messages sent by KrebsOnSecurity to Orvis were returned simply as “blocked.”
It’s not unusual for employees or contractors to post bits of sensitive data to public sites like Pastebin and Github, but the credentials file apparently published by someone working at or for Orvis is by far the most extreme example I’ve ever witnessed.
For instance, included in the Pastebin files from Orvis were plaintext usernames and passwords for just about every kind of online service or security product the company has used, including:
-Data backup services
-Multiple firewall products
-Call recording services
-Orvis wireless networks (public and private)
-Employee wireless phone services
-Oracle database servers
-Microsoft 365 services
-Microsoft Active Directory accounts and passwords
-Battery backup systems
-Mobile payment services
-Door and Alarm Codes
-Apple ID credentials
By all accounts, this was a comprehensive goof: The Orvis credentials file even contained the combination to a locked safe in the company’ server room.
The only clue about the source of the Orvis password file is a notation at the top of the document that reads “VT Technical Services.”
Holden said this particular exposure also highlights the issue with third parties, as the issue most likely originated not from Orvis staff itself.
“This is a continuously growing trend of exposures created not by the victims but by those that they consider to be trusted partners,” Holden said.
It’s fairly remarkable that a company can spend millions on all the security technology under the sun and have all of it potentially undermined by one ill-advised post to Pastebin, but that is certainly the reality we live in today.
Long gone are the days when one could post something for a few hours to a public document hosting service and expect nobody to notice. Today there are a number of third-party services that regularly index and preserve such postings, regardless of how ephemeral those posts may be.
“Pastebin and other similar repositories are constantly being monitored and any data put out there will be preserved no matter how brief the posting is,” Holden said. “In the current threat landscape, we see data exposures nearly as often as we see data breaches. These exposures vary in scope and impact, and this particular one is as bad as they come without specific data exposures.”
If you’re responsible for securing your organization’s environment, it would be an excellent idea to create some tools for monitoring for your domains and brands at Pastebin, Github and other sites where employees sometimes publish sensitive corporate data, inadvertently or otherwise. There are many ways to do this; here’s one example.
Have you built such monitoring tools for your organization or employer? If so, please feel free to sound off about your approach in the comments below.