Tech

Antivirus vendors push fixes for EFS ransomware attack method – ZDNet

Published

5 years ago

January 21, 2020

Researchers have disclosed how an EFS attack launched by ransomware leaves systems relying on signature-based antivirus solutions open to attack, with major vendors pushing fixes left, right, and center as a result.

On Tuesday, Amit Klein, the VP of Security Research at Safebreach Labs revealed an investigation into how the Windows Encrypting File System (EFS) can be abused by ransomware, a form of malware that encrypts systems and demands payment in return for the restoration of access.

A lab-based exploration of EFS, developed by Microsoft as an NTFS alternative to full disk encryption provided by BitLocker in order to encrypt individual files or directories, found that major antivirus solutions might not protect the system.

In a blog post, Safebreach Labs said that after testing three major anti-ransomware solutions offered by cybersecurity vendors, all three failed to stop attacks.

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The security solutions tested were ESET Internet Security 12.1.34.0, Kaspersky Anti Ransomware Tool for Business 4.0.0.861(a), and Microsoft Windows 10 Controlled Folder Access on Windows 10 64-bit version 1809 (Build 17763) using a virtual Windows 10 machine loaded up with a variety of different content and file types.

Safebreach Labs tested whether or not EFS could be exploited by creating its own ransomware variant employing tactics including the generation of keys and certificates. To begin the attack chain, the ransomware created both and then added the certificate to the personal certificate store, assigning the new key to act as the current EFS key, and invoked it on the files or folders destined for deletion.

The next step involved saving the key file to memory and deleting it from %APPDATA% MicrosoftCryptoRSA[user SID] and %ProgramData%MicrosoftCryptoRSAMachineKeys. EFS data was then flushed from memory, which made sure the “encrypted files become[s] unreadable to the user (and operating system),” according to the team.

If possible, the malware would then wipe slack parts of the disk, followed by the encryption of the key file data using a hard-wired public key in the ransomware. At this point, it could also be possible to send stolen information to an attacker’s command-and-control (C2) center.

According to the researchers, the encryption activities of EFS-based ransomware take place in the kernel and as the NTFS driver is in play, may also go unnoticed by file-system filter drivers. No human interaction or administration rights are required.

However, padlock icons are shown when files are encrypted — which may give victims an indication that all is not well — and if Data Recovery Agent is enabled, recovery can be “trivial,” the team says.

Safebreach Labs developed Proof of Concept (PoC) code and provided this, together with a report, to 17 cybersecurity vendors. As a result, the team realized more products were affected than originally thought.

Below is the rundown on each vendor, their susceptibility, and any actions taken:

Avast, Antivirus: “We implemented a workaround for version 19.8.” Avast, too, provided the researchers with a $1000 bounty.
Avira, Antivirus: “We have taken an exhaustive look at this potential vulnerability. While we value the reports of this potential vulnerability, we believe that this potential bypass which is dependent upon a customized use scenario is not a realistic ‘failure point.'”
Bitdefender: “As of today [January 10], the fix started rolling out on Bitdefender Antivirus, Bitdefender Total Security and Bitdefender Internet Security on version 24.0.14.85. On Bitdefender Free Edition the fix is in reporting mode only, being necessary for fine-tuning in the future.”
Check Point, SandBlast Agent | Zone Alarm: “Check Point has resolved the issue and the fix is currently available with the latest Corporate Endpoint Client E82.30 and will be available in the latest release of Zone Alarm Anti-Ransomware in the next couple of days.”
D7xTech, CryptoPrevent Anti Malware: Vendor notified July 5th, status unknown.
ESET, Ransomware Shield technology products: “In June of 2019, ESET was made aware of a possible security bypass of its consumer, business and server products for Windows via the standard Windows API EncryptFile. ESET was able to validate the underlying method used to administer this attack. We are now rolling out an update to mitigate the bypass and would like to kindly ask all customers to refer to Customer Advisory 2020-0002 for more information on mitigation options regarding the bypass published in this report.”
F-Secure, Internet Security (with DeepGuard) | SAFE: Already detected as suspicious: W32/Malware!Online and Trojan.TR/Ransom.Gen.
GridinSoft, GS Anti-Ransomware [beta]: “We have a free beta-test version of the program released in 2016. Since then it has not been updated and the main release version of the product has not been published. Since the program was last updated in 2016, it is more than logical that it protects against those ransomware families that were popular until 2016.”
IObit, Malware Fighter: A fix is now available in version 7.2.
Kaspersky (all): All the products were updated to protect against the technique.
McAfee, Endpoint products: “McAfee released protection against the sample code provided by the reporter in the Anti-Virus (AV) DATs released on 10th January. This covers both our Enterprise and Consumer products. The AV DATs are automatically updated and Customers can check the version of the DATs through the product User Interface. Enterprise Customers using MVision EDR have a detection rule available from 10th January which will trigger when some variations of this Proof of Concept are executed. Through EDR the administrator can scan their machines for other instances of the malware and then block execution or delete the malware.”
Microsoft, Windows Controlled Folder Access: “Microsoft considers Controlled Folder Access a defense-in-depth feature. We assessed this submittal to be a moderate class defense-in-depth issue, which does not meet the Microsoft Security Servicing Criteria for Windows. Microsoft may consider addressing this in a future product.”
Panda Security, Panda Adaptive Defense | Panda Dome Advanced: “Our protection approach for the Panda Adaptive Defense product line is not based on patterns but on classifying all the files/processes running at the end-point. Thus, any attack using unknown files/processes will be detected and blocked.”
Sophos, Intercept-X Endpoint | CryptoGuard: “We’ve updated Sophos Intercept X, and all customers using this product are protected.”
Symantec, Endpoint Protection: “We pushed out two detection signatures to mitigate the issue. Both of these signatures have been pushed out to all endpoints via our live update.”
TrendMicro, Apex One | RansomBuster: “Trend Micro is currently researching and working on implementing some enhancements to our endpoint protection products with anti-ransomware capabilities to try and prevent these types of attacks (ETA still in development). In the meantime, we recommend disabling EFS if it is not in [sic] use.”
Webroot, SecureAnywhere AV: “We appreciate SafeBreach bringing this new technique to our attention. While we haven’t seen this technique used in the wild yet, we now can arm our threat researchers with intel to combat it in the future.”

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A possible workaround is for administrators to change registry keys to turn off EFS, as well as use Group Policy in enterprise settings. However, if EFS is in active and legitimate use, then disabling the setting may impact required file protections.

“It is clear that in the face of the expected evolution of ransomware, that new anti-ransomware technologies need to be developed if the ransomware threat is to be contained and kept at bay,” the researchers say. “Signature-based solutions are not up to this job, heuristics-based (and even more so — generic technology-based) solutions seem more promising, but additional proactive research is required in order to “train” them against future threats.”

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The Internet is Littered in ‘Educated Guesses’ Without the ‘Education’

Published

1 week ago

October 8, 2024

Nick Kossovan

Although no one likes a know-it-all, they dominate the Internet.

The Internet began as a vast repository of information. It quickly became a breeding ground for self-proclaimed experts seeking what most people desire: recognition and money.

Today, anyone with an Internet connection and some typing skills can position themselves, regardless of their education or experience, as a subject matter expert (SME). From relationship advice, career coaching, and health and nutrition tips to citizen journalists practicing pseudo-journalism, the Internet is awash with individuals—Internet talking heads—sharing their “insights,” which are, in large part, essentially educated guesses without the education or experience.

The Internet has become a 24/7/365 sitcom where armchair experts think they’re the star.

Not long ago, years, sometimes decades, of dedicated work and acquiring education in one’s field was once required to be recognized as an expert. The knowledge and opinions of doctors, scientists, historians, et al. were respected due to their education and experience. Today, a social media account and a knack for hyperbole are all it takes to present oneself as an “expert” to achieve Internet fame that can be monetized.

On the Internet, nearly every piece of content is self-serving in some way.

The line between actual expertise and self-professed knowledge has become blurry as an out-of-focus selfie. Inadvertently, social media platforms have created an informal degree program where likes and shares are equivalent to degrees. After reading selective articles, they’ve found via and watching some TikTok videos, a person can post a video claiming they’re an herbal medicine expert. Their new “knowledge,” which their followers will absorb, claims that Panda dung tea—one of the most expensive teas in the world and isn’t what its name implies—cures everything from hypertension to existential crisis. Meanwhile, registered dietitians are shaking their heads, wondering how to compete against all the misinformation their clients are exposed to.

More disturbing are individuals obsessed with evangelizing their beliefs or conspiracy theories. These people write in-depth blog posts, such as Elvis Is Alive and the Moon Landings Were Staged, with links to obscure YouTube videos, websites, social media accounts, and blogs. Regardless of your beliefs, someone or a group on the Internet shares them, thus confirming your beliefs.

Misinformation is the Internet’s currency used to get likes, shares, and engagement; thus, it often spreads like a cosmic joke. Consider the prevalence of clickbait headlines:

You Won’t Believe What Taylor Swift Says About Climate Change!
This Bedtime Drink Melts Belly Fat While You Sleep!
In One Week, I Turned $10 Into $1 Million!

Titles that make outrageous claims are how the content creator gets reads and views, which generates revenue via affiliate marketing, product placement, and pay-per-click (PPC) ads. Clickbait headlines are how you end up watching a TikTok video by a purported nutrition expert adamantly asserting you can lose belly fat while you sleep by drinking, for 14 consecutive days, a concoction of raw eggs, cinnamon, and apple cider vinegar 15 minutes before going to bed.

Our constant search for answers that’ll explain our convoluted world and our desire for shortcuts to success is how Internet talking heads achieve influencer status. Because we tend to seek low-hanging fruits, we listen to those with little experience or knowledge of the topics they discuss yet are astute enough to know what most people want to hear.

There’s a trend, more disturbing than spreading misinformation, that needs to be called out: individuals who’ve never achieved significant wealth or traded stocks giving how-to-make-easy-money advice, the appeal of which is undeniable. Several people I know have lost substantial money by following the “advice” of Internet talking heads.

Anyone on social media claiming to have a foolproof money-making strategy is lying. They wouldn’t be peddling their money-making strategy if they could make easy money.

Successful people tend to be secretive.

Social media companies design their respective algorithms to serve their advertisers—their source of revenue—interest; hence, content from Internet talking heads appears most prominent in your feeds. When a video of a self-professed expert goes viral, likely because it pressed an emotional button, the more people see it, the more engagement it receives, such as likes, shares and comments, creating a cycle akin to a tornado.

Imagine scrolling through your TikTok feed and stumbling upon a “scientist” who claims they can predict the weather using only aluminum foil, copper wire, sea salt and baking soda. You chuckle, but you notice his video got over 7,000 likes, has been shared over 600 times and received over 400 comments. You think to yourself, “Maybe this guy is onto something.” What started as a quest to achieve Internet fame evolved into an Internet-wide belief that weather forecasting can be as easy as DIY crafts.

Since anyone can call themselves “an expert,” you must cultivate critical thinking skills to distinguish genuine expertise from self-professed experts’ self-promoting nonsense. While the absurdity of the Internet can be entertaining, misinformation has serious consequences. The next time you read a headline that sounds too good to be true, it’s probably an Internet talking head making an educated guess; without the education seeking Internet fame, they can monetize.

______________________________________________________________

Nick Kossovan, a self-described connoisseur of human psychology, writes about what’s

on his mind from Toronto. You can follow Nick on Twitter and Instagram @NKossovan.

Tech

Tight deadlines on software projects can put safety at risk: survey

Published

1 week ago

October 8, 2024

Anne Joseph

TORONTO – A new survey says a majority of software engineers and developers feel tight project deadlines can put safety at risk.

Seventy-five per cent of the 1,000 global workers who responded to the survey released Tuesday say pressure to deliver projects on time and on budget could be compromising critical aspects like safety.

The concern is even higher among engineers and developers in North America, with 77 per cent of those surveyed on the continent reporting the urgency of projects could be straining safety.

The study was conducted between July and September by research agency Coleman Parkes and commissioned by BlackBerry Ltd.’s QNX division, which builds connected-car technology.

The results reflect a timeless tug of war engineers and developers grapple with as they balance the need to meet project deadlines with regulations and safety checks that can slow down the process.

Finding that balance is an issue that developers of even the simplest appliances face because of advancements in technology, said John Wall, a senior vice-president at BlackBerry and head of QNX.

“The software is getting more complicated and there is more software whether it’s in a vehicle, robotics, a toaster, you name it… so being able to patch vulnerabilities, to prevent bad actors from doing malicious acts is becoming more and more important,” he said.

The medical, industrial and automotive industries have standardized safety measures and anything they produce undergoes rigorous testing, but that work doesn’t happen overnight. It has to be carried out from the start and then at every step of the development process.

“What makes safety and security difficult is it’s an ongoing thing,” Wall said. “It’s not something where you’ve done it, and you are finished.”

The Waterloo, Ont.-based business found 90 per cent of its survey respondents reported that organizations are prioritizing safety.

However, when asked about why safety may not be a priority for their organization, 46 per cent of those surveyed answered cost pressures and 35 per cent said a lack of resources.

That doesn’t surprise Wall. Delays have become rampant in the development of tech, and in some cases, stand to push back the launch of vehicle lines by two years, he said.

“We have to make sure that people don’t compromise on safety and security to be able to get products out quicker,” he said.

“What we don’t want to see is people cutting corners and creating unsafe situations.”

The survey also took a peek at security breaches, which have hit major companies like London Drugs, Indigo Books & Music, Giant Tiger and Ticketmaster in recent years.

About 40 per cent of the survey’s respondents said they have encountered a security breach in their employer’s operating system. Those breaches resulted in major impacts for 27 per cent of respondents, moderate impacts for 42 per cent and minor impacts for 27 per cent.

“There are vulnerabilities all the time and this is what makes the job very difficult because when you ship the software, presumably the software has no security vulnerabilities, but things get discovered after the fact,” Wall said.

Security issues, he added, have really come to the forefront of the problems developers face, so “really without security, you have no safety.”

This report by The Canadian Press was first published Oct. 8, 2024.

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Beware of scams during Amazon’s Prime Big Deal Days sales event: cybersecurity firm

Published

1 week ago

October 8, 2024

Anne Joseph

As online shoppers hunt for bargains offered by Amazon during its annual fall sale this week, cybersecurity researchers are warning Canadians to beware of an influx of scammers posing as the tech giant.

In the 30 days leading up to Amazon’s Prime Big Deal Days, taking place Tuesday and Wednesday, there were more than 1,000 newly registered Amazon-related web domains, according to Check Point Software Technologies, a company that offers cybersecurity solutions.

The company said it deemed 88 per cent of those domains malicious or suspicious, suggesting they could have been set up by scammers to prey on vulnerable consumers. One in every 54 newly created Amazon-related domain included the phrase “Amazon Prime.”

“They’re almost indiscernible from the real Amazon domain,” said Robert Falzon, head of engineering at Check Point in Canada.

“With all these domains registered that look so similar, it’s tricking a lot of people. And that’s the whole intent here.”

Falzon said Check Point Research sees an uptick in attempted scams around big online shopping days throughout the year, including Prime Days.

Scams often come in the form of phishing emails, which are deceptive messages that appear to be from a reputable source in attempt to steal sensitive information.

In this case, he said scammers posing as Amazon commonly offer “outrageous” deals that appear to be associated with Prime Days, in order to trick recipients into clicking on a malicious link.

The cybersecurity firm said it has identified and blocked 100 unique Amazon Prime-themed scam emails targeting organizations and consumers over the past two weeks.

Scammers also target Prime members with unsolicited calls, claiming urgent account issues and requesting payment information.

“It’s like Christmas for them,” said Falzon.

“People expect there to be significant savings on Prime Day, so they’re not shocked that they see something of significant value. Usually, the old adage applies: If it seems too good to be true, it probably is.”

Amazon’s website lists a number of red flags that it recommends customers watch for to identify a potential impersonation scam.

Those include false urgency, requests for personal information, or indications that the sender prefers to complete the purchase outside of the Amazon website or mobile app.

Scammers may also request that customers exclusively pay with gift cards, a claim code or PIN. Any notifications about an order or delivery for an unexpected item should also raise alarm bells, the company says.

“During busy shopping moments, we tend to see a rise in impersonation scams reported by customers,” said Amazon spokeswoman Octavia Roufogalis in a statement.

“We will continue to invest in protecting consumers and educating the public on scam avoidance. We encourage consumers to report suspected scams to us so that we can protect their accounts and refer bad actors to law enforcement to help keep consumers safe.”

Falzon added that these scams are more successful than people might think.

As of June 30, the Canadian Anti-Fraud Centre said there had been $284 million lost to fraud so far this year, affecting 15,941 victims.

But Falzon said many incidents go unreported, as some Canadians who are targeted do not know how or where to flag a scam, or may choose not to out of embarrassment.

Check Point recommends Amazon customers take precautions while shopping on Prime Days, including by checking URLs carefully, creating strong passwords on their accounts, and avoiding personal information being shared such as their birthday or social security number.

The cybersecurity company said consumers should also look for “https” at the beginning of a website URL, which indicates a secure connection, and use credit cards rather than debit cards for online shopping, which offer better protection and less liability if stolen.

This report by The Canadian Press was first published Oct. 8, 2024.

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