Tag Archive for: Cyber

How Cyber Safe is Your Drinking Water Supply?

Amid multiple recent reports of hackers breaking into and tampering with drinking water treatment systems comes a new industry survey with some sobering findings: A majority of the 52,000 separate drinking water systems in the United States still haven’t inventoried some or any of their information technology systems — a basic first step in protecting networks from cyberattacks.

The Water Sector Coordinating Council surveyed roughly 600 employees of water and wastewater treatment facilities nationwide, and found 37.9 percent of utilities have identified all IT-networked assets, with an additional 21.7 percent working toward that goal.

The Council found when it comes to IT systems tied to “operational technology” (OT) — systems responsible for monitoring and controlling the industrial operation of these utilities and their safety features — just 30.5 percent had identified all OT-networked assets, with an additional 22.5 percent working to do so.

“Identifying IT and OT assets is a critical first step in improving cybersecurity,” the report concluded. “An organization cannot protect what it cannot see.”

It’s also hard to see threats you’re not looking for: 67.9 percent of water systems reported no IT security incidents in the last 12 months, a somewhat unlikely scenario.

Michael Arceneaux, managing director of the WaterISAC — an industry group that tries to facilitate information sharing and the adoption of best practices among utilities in the water sector — said the survey shows much room for improvement and a need for support and resources.

“Threats are increasing, and the sector, EPA, CISA and USDA need to collaborate to help utilities prevent and recover from compromises,” Arceneaux said on Twitter.

While documenting each device that needs protection is a necessary first step, a number of recent cyberattacks on water treatment systems have been blamed on a failure to properly secure water treatment employee accounts that can be used for remote access.

In April, federal prosecutors unsealed an indictment against a 22-year-old from Kansas who’s accused of hacking into a public water system in 2019. The defendant in that case is a former employee of the water district he allegedly hacked.

In February, we learned that someone hacked into the water treatment plan in Oldsmar, Fla. and briefly increased the amount of sodium hydroxide (a.k.a. lye used to control acidity in the water) to 100 times the normal level. That incident stemmed from stolen or leaked employee credentials for TeamViewer, a popular program that lets users remotely control their computers.

In January, a hacker tried to poison a water treatment plant that served parts of the San Francisco Bay Area, reports Kevin Collier for NBCNews. The hacker in that case also had the username and password for a former employee’s TeamViewer account.

Image: WaterISAC.

Andrew Hildick-Smith is a consultant who served more than 15 years managing remote access systems for the Massachusetts Water Resources Authority. He said the percentage of companies that reported already having inventoried all of their IT systems is roughly equal to the number of larger water utilities (greater than 50,000 population) that recently had to certify to the Environmental Protection Agency (EPA) that they are compliant with the Water Infrastructure Act of 2018.

The water act gives utilities serving between 3,300 and 50,000 residents until the end of this month to complete a cybersecurity risk and resiliency assessment.

But Hildick-Smith said the vast majority of the nation’s water utilities — tens of thousands of them — serve fewer than 3,300 residents, and those utilities currently do not have to report to the EPA about their cybersecurity practices (or the lack thereof).

“A large number of utilities — probably close to 40,000 of them — are small enough that they haven’t been asked to do anything,” he said. “But some of those utilities are kind of doing cybersecurity based on self motivation rather than any requirement.”

According to the water sector report, a great many of the nation’s water utilities are subject to economic disadvantages typical of rural and urban communities.

“Others do not have access to a cybersecurity workforce,” the report explains. “Operating in the background is that these utilities are struggling to maintain and replace infrastructure, maintain revenues while addressing issues of affordability, and comply with safe and clean water regulations.”

The report makes the case for federal funding of state and local systems to provide cybersecurity training, tools and services for those in charge of maintaining IT systems, noting that 38 percent of water systems allocate less than 1 percent of their annual budgets to cybersecurity.

As the recent hacking incidents above can attest, enabling some form of multi-factor authentication for remote access can blunt many of these attacks.

However, the sharing of remote access credentials among water sector employees may be a contributing factor in these recent incidents, since organizations that let multiple employees use the same account also are less likely to have any form of multi-factor enabled.

A copy of the report is available here (PDF).

Update, 6:25 p.m. ET: Clarified that the report was issued by the Water Sector Coordinating Council (not the WaterISAC).

First American Financial Pays Farcical $500K Fine

In May 2019, KrebsOnSecurity broke the news that the website of mortgage settlement giant First American Financial Corp. [NYSE:FAF] was leaking more than 800 million documents — many containing sensitive financial data — related to real estate transactions dating back 16 years. This week, the U.S. Securities and Exchange Commission settled its investigation into the matter after the Fortune 500 company agreed to pay a paltry penalty of less than $500,000.

First American Financial Corp.

If you bought or sold a property in the last two decades or so, chances are decent that you also gave loads of personal and financial documents to First American. According to data from the American Land Title Association, First American is the second largest mortgage title and settlement company in the United States, handling nearly a quarter of all closings each year.

The SEC says First American derives nearly 92 percent of its revenue from its title insurance segment, earning $7.1 billion last year.

Title insurance protects homebuyers from the prospect of someone contesting their legitimacy as the new homeowner. According to SimpleShowing.com, there are actually two title insurance policies in each transaction — one for the buyer and one for the lender (the latter also needs protection as they’re providing the mortgage to purchase the home).

Title insurance is not mandated by law, but most lenders require it as part of any mortgage transaction. In other words, if you wish to take out a mortgage on a home you will not be able to do so without giving companies like First American gobs of documents about your income, assets and liabilities — including quite a bit of sensitive financial data.

Aside from its core business competency — checking to make sure the property at issue in any real estate transaction is unencumbered by any liens or other legal claims against it — First American basically has one job: Protect the privacy and security of all these documents.

A redacted screenshot of one of many millions of sensitive records exposed by First American’s Web site.

It’s easy to see why companies like First American might not view protecting this data as sacrosanct, as the entire industry’s incentive for safeguarding all those sensitive documents is somewhat misaligned.

That is to say, in the title insurance industry the parties to a real estate transaction aren’t customers, but rather they are are the product. The actual customers of the title insurance companies are principally the banks which back these mortgage transactions.

We see a similar dynamic with social media platforms, where the “user” is not the customer at all but the product whose data is being bought and sold by these platforms.

Roughly five months before KrebsOnSecurity notified First American that anyone with a web browser could view sensitive document in its “Eagle Pro” database online just by changing some characters at the end of a link, an internal security audit at First American flagged the exact same vulnerability.

But the company never acted to fix it until the news media came calling.

The SEC’s administrative proceeding (PDF) explains how things slipped through the cracks. Under First American’s documented vulnerability remediation policies, the data leak was classified as a security weakness with a “level 3” severity, which placed it in the “medium risk” category and required remediation within 45 days.

But rather than recording the vulnerability as a level 3 severity, due to a clerical error the vulnerability was erroneously entered as a level 2 or “low risk” severity in First American’s automated tracking system. Level 2 issues required remediation within 90 days. Even so, First American missed that mark.

The SEC said that under First American’s remediation policies, if the person responsible for fixing the problem is unable to do so based on the timeframes listed above, that employee must have their management contact the company’s information security department to discuss their remediation plan and proposed time estimate.

“If it is not technically possible to remediate the vulnerability, or if remediation is cost prohibitive, the [employee] and their management must contact Information Security to obtain a waiver or risk acceptance approval from the CISO,” the SEC explained. “The [employee] did not request a waiver or risk acceptance from the CISO.”

So, someone within First American accepted the risk, but that person neglected to ensure the higher-ups within the company also were comfortable with that risk. It’s difficult not to hum a tune whenever the phrase “accepted the risk” comes up if you’ve ever seen this excellent infosec industry parody.

The SEC took aim at First American because a few days after our May 24, 2019 story ran, the company issued an 8-K filing with the agency stating First American had no prior indication of any vulnerability.

“That statement demonstrated that First American’s senior management was not properly informed of the prior report of a vulnerability and a failure to remediate the problem,” wrote Michael Volkov, a 30-year federal prosecutor who now runs The Volkov Law Group in Washington, D.C.

Reporting for Reuters Regulatory Intelligence, Richard Satran says the SEC charged First American with violating Rule 13a-15(a) of the Exchange Act.

“The rule broadly requires firms involved in securities issuance to have a compliance process in place to assure material information follows securities laws,” Satran wrote. “The SEC avoided getting into the specific details of the breach and instead focused on the way its disclosure was handled.”

Mark Rasch, also former federal prosecutor in Washington, said the SEC is signaling with this action that it intends to take on more cases in which companies flub security governance in some big way.

“It’s a win for the SEC, and for First America, but it’s hardly justice,” Rasch said. “It’s a paltry fine, and it involves no admission of guilt by First American.”

Rasch said First American’s first problem was labeling the weakness as a medium risk.

“This is lots of sensitive data you’re exposing to anyone with a web browser,” Rasch said. “That’s a high-risk vulnerability. It also means you probably don’t know whether or not anyone has accessed that data. There’s no way to tell unless you can go back through all your logs all those years.”

The SEC said the 800 million+ records had been publicly available on First American’s website since 2013. In August 2019, the company said a third-party investigation into the exposure identified just 32 consumers whose non-public personal information likely was accessed without authorization.

When KrebsOnSecurity asked how long it maintained access logs or how far back in time that review went, First American declined to be more specific, saying only that its logs covered a period that was typical for a company of its size and nature.

However, documents from New York financial regulators show First American was unable to determine whether records were accessed prior to Jun 2018 (one year prior to fixing the weakness).

The records exposed by First American would have been a virtual gold mine for phishers and scammers involved in Business Email Compromise (BEC) scams, which often impersonate real estate agents, closing agencies, title and escrow firms in a bid to trick property buyers into wiring funds to fraudsters. According to the FBI, BEC scams are the most costly form of cybercrime today.

First American is not out of the regulatory woods yet from this enormous data leak. In July 2020, the New York State Department of Financial Services announced the company was the target of their first ever cybersecurity enforcement action in connection with the incident, charges that could bring steep financial penalties. That inquiry is ongoing.

The DFS considers each instance of exposed personal information a separate violation, and the company faces penalties of up to $1,000 per violation. According to the SEC, First American’s EaglePro database contained tens of millions of document images that included non-public personal information.

Ukrainian Police Nab Six Tied to CLOP Ransomware

Authorities in Ukraine this week charged six people alleged to be part of the CLOP ransomware group, a cybercriminal gang said to have extorted more than half a billion dollars from victims. Some of CLOP’s victims this year alone include Stanford University Medical School, the University of California, and University of Maryland.

A still shot from a video showing Ukrainian police seizing a Tesla, one of many high-end vehicles seized in this week’s raids on the Clop gang.

According to a statement and videos released today, the Ukrainian Cyber Police charged six defendants with various computer crimes linked to the CLOP gang, and conducted 21 searches throughout the Kyiv region.

First debuting in early 2019, CLOP is one of several ransomware groups that hack into organizations, launch ransomware that encrypts files and servers, and then demand an extortion payment in return for a digital key needed to unlock access.

/

CLOP has been especially busy over the past six months exploiting four different zero-day vulnerabilities in File Transfer Appliance (FTA), a file sharing product made by California-based Accellion.

The CLOP gang seized on those flaws to deploy ransomware to a significant number of Accellion’s FTA customers, including U.S. grocery chain Krogers, the law firm Jones Day, security firm Qualys, and the Singaporean telecom giant Singtel.

Last year, CLOP adopted the practice of attempting to extract a second ransom demand from victims in exchange for a promise not to publish or sell any stolen data. Terabytes of documents and files stolen from victim organizations that have not paid a data ransom are now available for download from CLOP’s deep web site, including Stanford, UCLA and the University of Maryland.

CLOP’s victim shaming blog on the deep web.

It’s not clear how much this law enforcement operation by Ukrainian authorities will affect the overall operations of the CLOP group. Cybersecurity intelligence firm Intel 471 says the law enforcement raids in Ukraine were limited to the cash-out and money laundering side of CLOP’s business only.

“We do not believe that any core actors behind CLOP were apprehended, due to the fact that they are probably living in Russia,” Intel 471 concluded. “The overall impact to CLOP is expected to be minor although this law enforcement attention may result in the CLOP brand getting abandoned as we’ve recently seen with other ransomware groups like DarkSide and Babuk” [links added].

While CLOP as a moneymaking collective is fairly young organization, security experts say CLOP members hail from a group of Threat Actors (TA) known as “TA505,” which MITRE‘s ATT&CK database says is a financially motivated cybercrime group that has been active since at least 2014. “This group is known for frequently changing malware and driving global trends in criminal malware distribution,” MITRE assessed.

How Does One Get Hired by a Top Cybercrime Gang?

The U.S. Department of Justice (DOJ) last week announced the arrest of a 55-year-old Latvian woman who’s alleged to have worked as a programmer for Trickbot, a malware-as-a-service platform responsible for infecting millions of computers and seeding many of those systems with ransomware.

Just how did a self-employed web site designer and mother of two come to work for one of the world’s most rapacious cybercriminal groups and then leave such an obvious trail of clues indicating her involvement with the gang? This post explores answers to those questions, as well as some of the ways Trickbot and other organized cybercrime gangs gradually recruit, groom and trust new programmers.

Alla Witte’s personal website — allawitte[.]nl — circa October 2018.

The indictment released by the DOJ (PDF) is heavily redacted, and only one of the defendants is named: Alla “Max” Witte, a 55-year-old Latvian national who was arrested Feb. 6 in Miami, Fla.

The DOJ alleges Witte was responsible for “overseeing the creation of code related to the monitoring and tracking of authorized users of the Trickbot malware, the control and deployment of ransomware, obtaining payments from ransomware victims, and developing tools and protocols for the storage of credentials stolen and exfiltrated from victims infected by Trickbot.”

The indictment also says Witte provided code to the Trickbot Group for a web panel used to access victim data stored in a database. According to the government, that database contained a large number of credit card numbers and stolen credentials from the Trickbot botnet, as well as information about infected machines available as bots.

“Witte provided code to this repository that showed an infected computer or ‘bot’ status in different colors based on the colors of a traffic light and allowed other Trickbot Group members to know when their co-conspirators were working on a particular infected machine,” the indictment alleges.

While any law enforcement action against a crime group that has targeted hospitals, schools, public utilities and governments is good news, Witte’s indictment and arrest were probably inevitable: It is hard to think of an accused cybercriminal who has made more stunningly poor and rookie operational security mistakes than this Latvian senior citizen.

For starters, it appears at one point in 2020 Witte actually hosted Trickbot malware on a vanity website registered in her nameallawitte[.]nl.

While it is generally a bad idea for cybercriminals to mix their personal life with work, Witte’s social media accounts mention a close family member (perhaps her son or husband) had the first name “Max,” which allegedly was her hacker handle.

Unlike many accused cybercriminals who hail from Russia or former Soviet countries, Witte did not feel obligated to avoid traveling to areas where she might be within reach of U.S. law enforcement agencies. According to her indictment, Witte was living in the South American nation of Suriname and she was arrested in Miami while flying from Suriname. It is not clear where her intended destination was.

A Google-translated post Witte made to her Vkontakte page, five years before allegedly joining the Trickbot group.

Alex Holden, founder of the cybersecurity intelligence firm Hold Security, said Witte’s greatest lapse in judgment came around Christmas time in 2019, when she infected one of her own computers with the Trickbot malware — allowing it to steal and log her data within the botnet interface.

“On top of the password re-use, the data shows a great insight into her professional and personal Internet usage,” Holden wrote in a blog post on Witte’s arrest.

“Many in the gang not only knew her gender but her name too,” Holden wrote. “Several group members had AllaWitte folders with data. They refer to Alla almost like they would address their mothers.”

So how did this hacker mom with apparently zero sense of self-preservation come to work for one of the world’s most predatory cybercriminal gangs?

The government’s indictment dedicates several pages to describing the hiring processes of the Trickbot group, which continuously scoured fee-based Russian and Belarussian-based job websites for resumes of programmers looking for work. Those who responded were asked to create various programs designed to test the applicant’s problem-solving and coding skills.

Here’s a snippet of translated instant message text between two of the unnamed Trickbot defendants, in which they discuss an applicant who understood immediately that he was being hired to help with cybercrime activity.

A conversation between two Trickbot group members concerning a potential new hire. Image: DOJ.

The following conversation, on or about June 1, 2016, concerned a potential new Trickbot hire who successfully completed a test task that involved altering a Firefox Web browser.

Other conversation snippets in the indictment suggest most new recruits understand that the projects and test tasks they are being asked to tackle are related to cybercrime activity.

“The majority understand that this is blackhat and asking for the commercial target,” wrote the defendant identified only as Co-Conspirator 8 (CC8).

But what about new hires that aren’t hip to exactly how the programs they’re being asked to create get used? Another source in the threat intelligence industry who has had access to the inner workings of Trickbot provided some additional context on how developers are onboarded into the group.

“There’s a two-step hiring process where at first you may not understand who you’re working for,” said the source. “But that timeframe is typically pretty short, like less than a year.”

After that, if the candidate is talented and industrious enough, someone in the Trickbot group will “read in” the new recruit — i.e. explain in plain terms how their work is being used.

“If you’re good, at some point they’re going to read you in and you’ll know, but if you’re not good or you’re not okay with that, they will triage that pretty quickly and your services will no longer be required,” the source said. “But if you make it past that first year, the chances that you still don’t know what you’re doing are very slim.”

According to the DOJ, Witte had access to Trickbot for roughly two years between 2018 and 2020.

Investigators say prior to launching Trickbot, some members of the conspiracy previously were responsible for disseminating Dyre, a particularly stealthy password stealer that looked for passwords used at various banks. The government says Trickbot members — including Witte — routinely used bank account passwords stolen by their malware to drain victim bank accounts and send the money to networks of money mules.

The hiring model adopted by Trickbot allows the gang to recruit a steady stream of talented developers cheaply and covertly. But it also introduces the very real risk that new recruits may offer investigators a way to infiltrate the group’s operations, and possibly even identify co-conspirators.

Ransomware attacks are nearly all perpetrated these days by ransomware affiliate groups which constantly recruit new members to account for attrition, competition from other ransomware groups, and for the odd affiliate who gets busted by law enforcement.

Under the ransomware affiliate model, a cybercriminal can earn up to 85 percent of the total ransom paid by a victim company he or she is responsible for compromising and bringing to the group. But from time to time, poor operational security by an affiliate exposes the gang’s entire operation.

On June 7, the DOJ announced it had clawed back $2.3 million worth of Bitcoin that Colonial Pipeline paid to ransomware extortionists last month. The funds had been sent to DarkSide, a ransomware-as-a-service syndicate that disbanded after a May 14 farewell message to affiliates saying its Internet servers and cryptocurrency stash were seized by unknown law enforcement entities.

“The proceeds of the victim’s ransom payment…had been transferred to a specific address, for which the FBI has the ‘private key,’ or the rough equivalent of a password needed to access assets accessible from the specific Bitcoin address,” the DOJ explained, somewhat cryptically.

Multiple security experts quickly zeroed in on how investigators were able to retrieve the funds, which did not represent the total amount Colonial paid (~$4.4 million): The amount seized was roughly what a top DarkSide affiliate would have earned for scoring the initial malware infection that precipitated the ransomware incident.

Microsoft Patches Six Zero-Day Security Holes

Microsoft today released another round of security updates for Windows operating systems and supported software, including fixes for six zero-day bugs that malicious hackers already are exploiting in active attacks.

June’s Patch Tuesday addresses just 49 security holes — about half the normal number of vulnerabilities lately. But what this month lacks in volume it makes up for in urgency: Microsoft warns that bad guys are leveraging a half-dozen of those weaknesses to break into computers in targeted attacks.

Among the zero-days are:

CVE-2021-33742, a remote code execution bug in a Windows HTML component.
CVE-2021-31955, an information disclosure bug in the Windows Kernel
CVE-2021-31956, an elevation of privilege flaw in Windows NTFS
CVE-2021-33739, an elevation of privilege flaw in the Microsoft Desktop Window Manager
CVE-2021-31201, an elevation of privilege flaw in the Microsoft Enhanced Cryptographic Provider
CVE-2021-31199, an elevation of privilege flaw in the Microsoft Enhanced Cryptographic Provider

Kevin Breen, director of cyber threat research at Immersive Labs, said elevation of privilege flaws are just as valuable to attackers as remote code execution bugs: Once the attacker has gained an initial foothold, he can move laterally across the network and uncover further ways to escalate to system or domain-level access.

“This can be hugely damaging in the event of ransomware attacks, where high privileges can enable the attackers to stop or destroy backups and other security tools,” Breen said. “The ‘exploit detected’ tag means attackers are actively using them, so for me, it’s the most important piece of information we need to prioritize the patches.”

Microsoft also patched five critical bugs — flaws that can be remotely exploited to seize control over the targeted Windows computer without any help from users. CVE-2021-31959 affects everything from Windows 7 through Windows 10 and Server versions 2008, 2012, 2016 and 2019.

Sharepoint also got a critical update in CVE-2021-31963; Microsoft says this one is less likely to be exploited, but then critical Sharepoint flaws are a favorite target of ransomware criminals.

Interestingly, two of the Windows zero-day flaws — CVE-2021-31201 and CVE-2021-31199 — are related to a patch Adobe released recently for CVE-2021-28550, a flaw in Adobe Acrobat and Reader that also is being actively exploited.

“Attackers have been seen exploiting these vulnerabilities by sending victims specially crafted PDFs, often attached in a phishing email, that when opened on the victim’s machine, the attacker is able to gain arbitrary code execution,” said Christopher Hass, director of information security and research at Automox. “There are no workarounds for these vulnerabilities, patching as soon as possible is highly recommended.”

In addition to updating Acrobat and Reader, Adobe patched flaws in a slew of other products today, including Adobe Connect, Photoshop, and Creative Cloud. The full list is here, with links to updates.

The usual disclaimer:

Before you update with this month’s patch batch, please make sure you have backed up your system and/or important files. It’s not uncommon for Windows updates to hose one’s system or prevent it from booting properly, and some updates even have been known to erase or corrupt files.

So do yourself a favor and backup before installing any patches. Windows 10 even has some built-in tools to help you do that, either on a per-file/folder basis or by making a complete and bootable copy of your hard drive all at once.

And if you wish to ensure Windows has been set to pause updating so you can back up your files and/or system before the operating system decides to reboot and install patches on its own schedule, see this guide.

As always, if you experience glitches or problems installing any of these patches this month, please consider leaving a comment about it below; there’s a better-than-even chance other readers have experienced the same and may chime in here with some helpful tips.

For a quick visual breakdown of each update released today and its severity level, check out the this Patch Tuesday post from the SANS Internet Storm Center.

Adventures in Contacting the Russian FSB

KrebsOnSecurity recently had occasion to contact the Russian Federal Security Service (FSB), the Russian equivalent of the U.S. Federal Bureau of Investigation (FBI). In the process of doing so, I encountered a small snag: The FSB’s website said in order to communicate with them securely, I needed to download and install an encryption and virtual private networking (VPN) appliance that is flagged by at least 20 antivirus products as malware.

The FSB headquarters at Lubyanka Square, Moscow. Image: Wikipedia.

The reason I contacted the FSB — one of the successor agencies to the Russian KGB — ironically enough had to do with security concerns raised by an infamous Russian hacker about the FSB’s own preferred method of being contacted.

KrebsOnSecurity was seeking comment from the FSB about a blog post published by Vladislav “BadB” Horohorin, a former international stolen credit card trafficker who served seven years in U.S. federal prison for his role in the theft of $9 million from RBS WorldPay in 2009. Horohorin, a citizen of Russia, Israel and Ukraine, is now back where he grew up in Ukraine, running a cybersecurity consulting business.

Horohorin’s BadB carding store, badb[.]biz, circa 2007. Image: Archive.org.

Visit the FSB’s website and you might notice its web address starts with http:// instead of https://, meaning the site is not using an encryption certificate. In practical terms, any information shared between the visitor and the website is sent in plain text and will be visible to anyone who has access to that traffic.

This appears to be the case regardless of which Russian government site you visit. According to Russian search giant Yandex, the laws of the Russian Federation demand that encrypted connections be installed according to the Russian GOST cryptographic algorithm.

That means those who have a reason to send encrypted communications to a Russian government organization — including ordinary things like making a payment for a government license or fine, or filing legal documents — need to first install CryptoPro, a Windows-only application that loads the GOST encryption libraries on a user’s computer.

But if you want to talk directly to the FSB over an encrypted connection, you can just install their own client, which bundles the CryptoPro code. Visit the FSB’s site and select the option to “transfer meaningful information to operational units,” and you’ll see a prompt to install a “random number generation” application that is needed before a specific contact form on the FSB’s website will load properly.

Mind you, I’m not suggesting anyone go do that: Horohorin pointed out that this random number generator was flagged by 20 different antivirus and security products as malicious.

“Think well before contacting the FSB for any questions or dealing with them, and if you nevertheless decide to do this, it is better to use a virtual machine,” Horohorin wrote. “And a spacesuit. And, preferably, while in another country.”

Antivirus product detections on the FSB’s VPN software. Image: VirusTotal.

It’s probably worth mentioning that the FSB is the same agency that’s been sanctioned for malicious cyber activity by the U.S. government on multiple occasions over the past five years. According to the most recent sanctions by the U.S. Treasury Department, the FSB is known for recruiting criminal hackers from underground forums and offering them legal cover for their actions.

“To bolster its malicious cyber operations, the FSB cultivates and co-opts criminal hackers, including the previously designated Evil Corp., enabling them to engage in disruptive ransomware attacks and phishing campaigns,” reads a Treasury assessment from April 2021.

While Horohorin seems convinced the FSB is disseminating malware, it is not unusual for a large number of security tools used by VirusTotal or other similar malware “sandbox” services to incorrectly flag safe files as bad or suspicious — an all-too-common condition known as a “false positive.”

Late last year I warned my followers on Twitter to put off installing updates for their Dell products until the company could explain why a bunch of its software drivers were being detected as malware by two dozen antivirus tools. Those all turned out to be false positives.

To really figure out what this FSB software was doing, I turned to Lance James, the founder of Unit221B, a New York City based cybersecurity firm. James said each download request generates a new executable program. That is because the uniqueness of the file itself is part of what makes the one-to-one encrypted connection possible.

“Essentially it is like a temporary, one-time-use VPN, using a separate key for each download” James said. “The executable is the handshake with you to exchange keys, as it stores the key for that session in the exe. It’s a terrible approach. But it’s what it is.”

James said the FSB’s program does not appear to be malware, at least in terms of the actions it takes on a user’s computer.

“There’s no sign of actual trojan activity here except the fact it self deletes,” James said. “It uses GOST encryption, and [the antivirus products] may be thinking that those properties look like ransomware.”

James says he suspects the antivirus false-positives were triggered by certain behaviors which could be construed as malware-like. The screenshot below — from VirusTotal — says some of the file’s contents align with detection rules made to find instances of ransomware.

Some of the malware detection rules triggered by the FSB’s software. Source: VirusTotal.

Other detection rules tripped by this file include program routines that erase event logs from the user’s system — a behavior often seen in malware that is trying to hide its tracks.

On a hunch that just including the GOST encryption routine in a test program might be enough to trigger false positives in VirusTotal, James wrote and compiled a short program in C++ that invoked the GOST cipher but otherwise had no networking components. He then uploaded the file for scanning at VirusTotal.

Even though James’ test program did nothing untoward or malicious, it was flagged by six antivirus engines as potentially hostile. Symantec’s machine learning engine seemed particularly certain that James’ file might be bad, awarding it the threat name “ML.Attribute.HighConfidence” — the same designation it assigned to the FSB’s program.

KrebsOnSecurity installed the FSB’s software on a test computer using a separate VPN, and straight away it connected to an Internet address currently assigned to the FSB (213.24.76.xxx).

The program prompted me to click on various parts of the screen to generate randomness for an encryption key, and when that was done it left a small window which explained in Russian that the connection was established and that I should visit a specific link on the FSB’s site.

The FSB’s random number generator in action.

Doing so opened up a page where I could leave a message for the FSB. I asked them if they had any response to their program being broadly flagged as malware.

The contact form that ultimately appeared after installing the FSB’s software and clicking a specific link at fsb[.]ru.

After all the effort, I’m disappointed to report that I have not yet received a reply. Nor did I hear back from S-Terra CSP, the company that makes the VPN software offered by the FSB.

James said that given their position, he could see why many antivirus products might think it’s malware.

“Since they won’t use our crypto and we won’t use theirs,” James said. “It’s a great explanation on political weirdness with crypto.”

Still, James said, a number of things just don’t make sense about the way the FSB has chosen to deploy its one-time VPN software.

“The way they have set this up to suddenly trust a dynamically changing exe is still very concerning. Also, why would you send me a 256 random number generator seed in an exe when the computer has a perfectly valid and tested random number generator built in? You’re sending an exe to me with a key you decide over a non-secure environment. Why the fuck if you’re a top intelligence agency would you do that?”

Why indeed. I wonder how many people would share information about federal crimes with the FBI if the agency required everyone to install an executable file first — to say nothing of one that looks a lot like ransomware to antivirus firms?

After doing this research, I learned the FSB recently launched a website that is only reachable via Tor, software that protects users’ anonymity by bouncing their traffic between different servers and encrypting the traffic at every step of the way. Unlike the FSB’s clear web site, the agency’s Tor site does not ask visitors to download some dodgy software before contacting them.

“The application is running for a limited time to ensure your safety,” the instructions for the FSB’s random number generator assure, with just a gentle nudge of urgency. “Do not forget to close the application when finished.”

Yes, don’t forget that. Also, do not forget to incinerate your computer when finished.

Justice Dept. Claws Back $2.3M Paid by Colonial Pipeline to Ransomware Gang

The U.S. Department of Justice said today it has recovered $2.3 million worth of Bitcoin that Colonial Pipeline paid to ransomware extortionists last month. The funds had been sent to DarkSide, a ransomware-as-a-service syndicate that disbanded after a May 14 farewell message to affiliates saying its Internet servers and cryptocurrency stash were seized by unknown law enforcement entities.

On May 7, the DarkSide ransomware gang sprang its attack against Colonial, which ultimately paid 75 Bitcoin (~$4.4 million) to its tormentors. The company said the attackers only hit its business IT networks — not its pipeline security and safety systems — but that it shut the pipeline down anyway as a precaution [several publications noted Colonial shut down its pipeline because its billing system was impacted, and it had no way to get paid].

On or around May 14, the DarkSide representative on several Russian-language cybercrime forums posted a message saying the group was calling it quits.

“Servers were seized, money of advertisers and founders was transferred to an unknown account,” read the farewell message. “Hosting support, apart from information ‘at the request of law enforcement agencies,’ does not provide any other information.”

A message from the DarkSide and REvil ransomware-as-a-service cybercrime affiliate programs.

Many security experts said they suspected DarkSide was just laying low for a while thanks to the heat from the Colonial attack, and that the group would re-emerge under a new banner in the coming months. And while that may be true, the seizure announced today by the DOJ certainly supports the DarkSide administrator’s claims that their closure was involuntary.

Security firms have suspected for months that the DarkSide gang shares some leadership with that of REvil, a.k.a. Sodinokibi, another ransomware-as-a-service platform that closed up shop in 2019 after bragging that it had extorted more than $2 billion from victims. That suspicion was solidified further when the REvil administrator added his comments to the announcement about DarkSide’s closure (see screenshot above).

First surfacing on Russian language hacking forums in August 2020, DarkSide is a ransomware-as-a-service platform that vetted cybercriminals can use to infect companies with ransomware and carry out negotiations and payments with victims. DarkSide says it targets only big companies, and forbids affiliates from dropping ransomware on organizations in several industries, including healthcare, funeral services, education, public sector and non-profits.

According to an analysis published May 18 by cryptocurrency security firm Elliptic, 47 cybercrime victims paid DarkSide a total of $90 million in Bitcoin, putting the average ransom payment of DarkSide victims at just shy of $2 million.

HOW DID THEY DO IT?

The DoJ’s announcement left open the question of how exactly it was able to recover a portion of the payment made by Colonial, which shut down its Houston to New England fuel pipeline for a week and prompted long lines, price hikes and gas shortages at filling stations across the nation.

The DOJ said law enforcement was able to track multiple transfers of bitcoin and identify that approximately 63.7 bitcoins (~$3.77 million on May 8), “representing the proceeds of the victim’s ransom payment, had been transferred to a specific address, for which the FBI has the ‘private key,’ or the rough equivalent of a password needed to access assets accessible from the specific Bitcoin address.”

A passage from the DOJ’s press release today.

How it came to have that private key is the key question. Nicholas Weaver, a lecturer at the computer science department at University of California, Berkeley, said the most likely explanation is that law enforcements agent seized money from a specific DarkSide affiliate responsible for bringing the crime gang the initial access to Colonial’s systems.

“The ‘obtained the private key’ part of their statement is doing a lot of work,” Weaver said, point out that the amount the FBI recovered was less than the full amount Colonial paid.

“It is ONLY the Colonial Pipeline ransom, and it looks to be only the affiliate’s take.”

Experts at Elliptic came to the same conclusion.

“Any ransom payment made by a victim is then split between the affiliate and the developer,” writes Elliptic’s co-founder Tom Robinson. “In the case of the Colonial Pipeline ransom payment, 85% (63.75 BTC) went to the affiliate and 15% went to the DarkSide developer.”

The Biden administration is under increasing pressure to do something about the epidemic of ransomware attacks. In conjunction with today’s action, the DOJ called attention to the wins of its Ransomware and Digital Extortion Task Force, which have included successful prosecutions of crooks behind such threats as the Netwalker and SamSam ransomware strains.

The DOJ also released a June 3 memo from Deputy Attorney General Lisa O. Monaco instructing all federal prosecutors to adhere to new guidelines that seek centralize reporting about ransomware victims.

Having a central place for law enforcement and intelligence agencies to gather and act on ransomware threats was one of the key recommendations of a ransomware task force being led by some of the world’s top tech firms. In an 81-page report, the industry led task force called for an international coalition to combat ransomware criminals, and for a global network of investigation hubs. Their recommendations focus mainly on disrupting cybercriminal ransomware gangs by limiting their ability to get paid, and targeting the individuals and finances of the organized thieves behind these crimes.

Using Fake Reviews to Find Dangerous Extensions

Fake, positive reviews have infiltrated nearly every corner of life online these days, confusing consumers while offering an unwelcome advantage to fraudsters and sub-par products everywhere. Happily, identifying and tracking these fake reviewer accounts is often the easiest way to spot scams. Here’s the story of how bogus reviews on a counterfeit Microsoft Authenticator browser extension exposed dozens of other extensions that siphoned personal and financial data.

Comments on the fake Microsoft Authenticator browser extension show the reviews for these applications are either positive or very negative — basically calling it out as a scam. Image: chrome-stats.com.

After hearing from a reader about a phony Microsoft Authenticator extension that appeared on the Google Chrome Store, KrebsOnSecurity began looking at the profile of the account that created it. There were a total of five reviews on the extension before it was removed: Three Google users gave it one star, warning people to stay far away from it; but two of the reviewers awarded it between three and four stars.

“It’s great!,” the Google account Theresa Duncan enthused, improbably. “I’ve only had very occasional issues with it.”

“Very convenient and handing,” assessed Anna Jones, incomprehensibly.

Google’s Chrome Store said the email address tied to the account that published the knockoff Microsoft extension also was responsible for one called “iArtbook Digital Painting.” Before it was removed from the Chrome Store, iArtbook had garnered just 22 users and three reviews. As with the knockoff Microsoft extension, all three reviews were positive, and all were authored by accounts with first and last names, like Megan Vance, Olivia Knox, and Alison Graham.

Google’s Chrome Store doesn’t make it easy to search by reviewer. For that I turned to Hao Nguyen, the developer behind chrome-stats.com, which indexes and makes searchable a broad array of attributes about extensions available from Google.

Looking at the Google accounts that left positive reviews on both the now-defunct Microsoft Authenticator and iArtbook extensions, KrebsOnSecurity noticed that each left positive reviews on a handful of other extensions that have since been removed.

Reviews on the iArtbook extension were all from apparently fake Google accounts that each reviewed two other extensions, one of which was published by the same developer. This same pattern was observed across 45 now-defunct extensions.

Like an ever-expanding venn diagram, a review of the extensions commented on by each new fake reviewer found led to the discovery of even more phony reviewers and extensions. In total, roughly 24 hours worth of digging through chrome-stats.com unearthed more than 100 positive reviews on a network of patently fraudulent extensions.

Those reviews in turn lead to the relatively straightforward identification of:

-39 reviewers who were happy with extensions that spoofed major brands and requested financial data
-45 malicious extensions that collectively had close to 100,000 downloads
-25 developer accounts tied to multiple banned applications

The extensions spoofed a range of consumer brands, including Adobe, Amazon, Facebook, HBO, Microsoft, Roku and Verizon. Scouring the manifests for each of these other extensions in turn revealed that many of the same developers were tied to multiple apps being promoted by the same phony Google accounts.

Some of the fake extensions have only a handful of downloads, but most have hundreds or thousands. A fake Microsoft Teams extension attracted 16,200 downloads in the roughly two months it was available from the Google store. A counterfeit version of CapCut, a professional video editing software suite, claimed nearly 24,000 downloads over a similar time period.

More than 16,000 people downloaded a fake Microsoft Teams browser extension over the roughly two months it was available for download from the Google Chrome store.

Unlike malicious browser extensions that can turn your PC into a botnet or harvest your cookies, none of the extensions examined here request any special permissions from users. Once installed, however, they invariably prompt the user to provide personal and financial data — all the while pretending to be associated with major brand names.

In some cases, the fake reviewers and phony extension developers used in this scheme share names, such as the case with “brook ice,” the Google account that positively reviewed the malicious Adobe and Microsoft Teams extensions. The email address brookice100@gmail.com was used to register the developer account responsible for producing two of the phony extensions examined in this review (PhotoMath and Dollify).

Some of the data that informed this report. The full spreadsheet is available as a link at the end of the story.

As we can see from the spreadsheet snippet above, many of the Google accounts that penned positive reviews on patently bogus extensions left comments on multiple apps on the same day.

Additionally, Google’s account recovery tools indicate many different developer email addresses tied to extensions reviewed here share the same recovery email — suggesting a relatively few number of anonymous users are controlling the entire scheme. When the spreadsheet data shown above is sorted by email address of the extension developer, the grouping of the reviews by date becomes even clearer.

KrebsOnSecurity shared these findings with Google and will update this story in the event they respond. Either way, Google somehow already detected all of these extensions as fraudulent and removed them from its store.

However, there may be a future post here about how long that bad extension identification and removal process has taken over time. Overall, most of these extensions were available for two to three months before being taken down.

As for the “so what?” here? I performed this research mainly because I could, and I thought it was interesting enough to share. Also, I got fascinated with the idea that finding fake applications might be as simple as identifying and following the likely fake reviewers. I’m positive there is more to this network of fraudulent extensions than is documented here.

As this story illustrates, it pays to be judicious about installing extensions. Leaving aside these extensions which are outright fraudulent, so many legitimate extensions get abandoned or sold each year to shady marketers that it’s wise to only trust extensions that are actively maintained (and perhaps have a critical mass of users that would make noise if anything untoward happened with the software).

According to chrome-stats.com, the majority of extensions — more than 100,000 of them — are effectively abandoned by their authors, or haven’t been updated in more than two years. In other words, there a great many developers who are likely to be open to someone else buying up their creation along with their user base.

The information that informed this report is searchable in this Google spreadsheet.

Boss of ATM Skimming Syndicate Arrested in Mexico

Florian “The Shark” Tudor, the alleged ringleader of a prolific ATM skimming gang that siphoned hundreds of millions of dollars from bank accounts of tourists visiting Mexico over the last eight years, was arrested in Mexico City on Thursday in response to an extradition warrant from a Romanian court.

Florian Tudor, at a 2020 press conference in Mexico in which he asserted he was a legitimate businessman and not a mafia boss. Image: OCCRP.

Tudor, a native of Craiova, Romania, moved to Mexico to set up Top Life Servicios, an ATM servicing company which managed a fleet of relatively new ATMs based in Mexico branded as Intacash.

Intacash was the central focus of a threepart investigation KrebsOnSecurity published in September 2015. That series tracked the activities of a crime gang working with Intacash that was bribing and otherwise coercing ATM technicians to install sophisticated Bluetooth-based skimmers inside cash machines throughout popular tourist destinations in and around Mexico’s Yucatan Peninsula — including Cancun, Cozumel, Playa del Carmen and Tulum.

Follow-up reporting last year by the Organized Crime and Corruption Reporting Project (OCCRP) found Tudor and his associates compromised more than 100 ATMs across Mexico using skimmers that were able to remain in place undetected for years. The OCCRP, which dubbed Tudor’s group “The Riviera Maya Gang,” estimates the crime syndicate used cloned card data and stolen PINs to steal more than $1.2 billion from bank accounts of tourists visiting the region.

Last year, a Romanian court ordered Tudor’s capture following his conviction in absentia for attempted murder, blackmail and the creation of an organized crime network that specialized in human trafficking.

Mexican authorities have been examining bank accounts tied to Tudor and his companies, and investigators believe Tudor and his associates paid protection and hush money to various Mexican politicians and officials over the years. In February, the leader of Mexico’s Green Party stepped down after it emerged that he received funds from Tudor’s group.

This is the second time Mexican authorities have detained Tudor. In April 2019, Tudor and his deputy were arrested for illegal firearms possession. That arrest came just months after Tudor allegedly ordered the execution of a former bodyguard who was trying to help U.S. authorities bring down the group’s lucrative skimming operations.

Tudor’s arrest this week inside the premises of the Mexican Attorney General’s Office did not go smoothly, according to Mexican news outlets. El Universal reports that a brawl broke out between Tudor’s lawyers and officials at the Mexican AG’s office, and a video released by the news outlet on Twitter shows Tudor resisting arrest as he is being hauled out of the building hand and foot.

A Mexican judge will decide on Tudor’s extradition to Romania in the coming weeks.

How to Tell a Job Offer from an ID Theft Trap

One of the oldest scams around — the fake job interview that seeks only to harvest your personal and financial data — is on the rise, the FBI warns. Here’s the story of a recent LinkedIn impersonation scam that led to more than 100 people getting duped, and one almost-victim who decided the job offer was too-good-to-be-true.

Last week, someone began began posting classified notices on LinkedIn for different design consulting jobs at Geosyntec Consultants, an environmental engineering firm based in the Washington, D.C. area. Those who responded were told their application for employment was being reviewed and that they should email Troy Gwin — Geosyntec’s senior recruiter — immediately to arrange a screening interview.

Gwin contacted KrebsOnSecurity after hearing from job seekers trying to verify the ad, which urged respondents to email Gwin at a Gmail address that was not his. Gwin said LinkedIn told him roughly 100 people applied before the phony ads were removed for abusing the company’s terms of service.

“The endgame was to offer a job based on successful completion of background check which obviously requires entering personal information,” Gwin said. “Almost 100 people applied. I feel horrible about this. These people were really excited about this ‘opportunity’.”

Erica Siegel was particularly excited about the possibility of working in a creative director role she interviewed for at the fake Geosyntec. Siegel said her specialty — helping wealthy people develop their own personal brands — has been in low demand throughout the pandemic, so she’s applied to dozens of jobs and freelance gigs over the past few months.

On Monday, someone claiming to work with Gwin contacted Siegel and asked her to set up an online interview with Geosyntec. Siegel said the “recruiter” sent her a list of screening questions that all seemed relevant to the position being advertised.

Siegel said that within about an hour of submitting her answers, she received a reply saying the company’s board had unanimously approved her as a new hire, with an incredibly generous salary considering she had to do next to no work to get a job she could do from home.

Worried that her potential new dream job might be too-good-to-be-true, she sent the recruiter a list of her own questions that she had about the role and its position within the company.

But the recruiter completely ignored Siegel’s follow-up questions, instead sending a reply that urged her to get in touch with a contact in human resources to immediately begin the process of formalizing her employment. Which of course involves handing over one’s personal (driver’s license info) and financial details for direct deposit.

Multiple things about this job offer didn’t smell right to Siegel.

“I usually have six or seven interviews before getting a job,” Siegel said. “Hardly ever in my lifetime have I seen a role that flexible, completely remote and paid the kind of money I would ask for. You never get all three of those things.”

So she called her dad, an environmental attorney who happens to know and have worked with people at the real Geosyntec Consultants. Then she got in touch with the real Troy Gwin, who confirmed her suspicions that the whole thing was a scam.

“Even after the real Troy said they’d gotten these [LinkedIn] ads shut down, this guy was still emailing me asking for my HR information,” Siegel said. “So my dad said, ‘Troll him back, and tell him you want a signing bonus via money order.’ I was like, okay, what’s the worst that could happen? I never heard from him again.”

HOW TO SPOT A JOB SCAM

In late April, the FBI warned that technology is making these scams easier and more lucrative for fraudsters, who are particularly fond of impersonating recruiters.

“Fake Job or Employment Scams occur when criminal actors deceive victims into believing they have a job or a potential job,” the FBI warned. “Criminals leverage their position as “employers” to persuade victims to provide them with personally identifiable information (PII), become unwitting money mules, or to send them money.”

Last year, some 16,012 people reported being victims of employment scams with losses totaling more than $59 million, according to the FBI’s Internet Crime Complaint Center (IC3). But the real losses each year from employment scams are likely far higher; as the Justice Department often points out, relatively few victims of these crimes report the matter to the IC3.

LinkedIn said its platform uses automated and manual defenses to detect and address fake accounts or fraudulent payments.

“Any accounts or job posts that violate our policies are blocked from the site,” LinkedIn said in response to a request for comment. “The majority of fake job postings are stopped before going live on our site, and for those job postings that aren’t, whenever we find fake posts, we work to remove it quickly.”

LinkedIn’s most recent transparency report says these automated defenses block or automatically remove 98.4% of the fake accounts. But the scam that ensnared Gwin and Siegel is more of a hybrid, in that the majority of it operates outside of LinkedIn’s control via email services like Gmail and Yahoo.

This, by the way, should be a major red flag for anyone searching for a job, says the FBI: “Potential employers contact victims through non-company email domains and teleconference applications.”

Here are some other telltale signs of a job scam, as per the FBI:

-Interviews are not conducted in-person or through a secure video call.
-Potential employers contact victims through non-company email domains and teleconference applications.
-Potential employers require employees to purchase start-up equipment from the company.
-Potential employers require employees to pay upfront for background investigations or screenings.
-Potential employers request credit card information.
-Potential employers send an employment contract to physically sign asking for PII.
-Job postings appear on job boards, but not on the companies’ websites.
-Recruiters or managers do not have profiles on the job board, or the profiles do not seem to fit their roles.