Security – Page 22

Ars Technica used in malware campaign with never-before-seen obfuscation

ars technica, Biz & IT, malware, Security / Shannon Garcia / January 30, 2024

WHEN USERS ATTACK —

Vimeo also used by legitimate user who posted booby-trapped content.

Dan Goodin – Jan 30, 2024 9: 24 pm UTC

Ars Technica was recently used to serve second-stage malware in a campaign that used a never-before-seen attack chain to cleverly cover its tracks, researchers from security firm Mandiant reported Tuesday.

A benign image of a pizza was uploaded to a third-party website and was then linked with a URL pasted into the “about” page of a registered Ars user. Buried in that URL was a string of characters that appeared to be random—but were actually a payload. The campaign also targeted the video-sharing site Vimeo, where a benign video was uploaded and a malicious string was included in the video description. The string was generated using a technique known as Base 64 encoding. Base 64 converts text into a printable ASCII string format to represent binary data. Devices already infected with the first-stage malware used in the campaign automatically retrieved these strings and installed the second stage.

Not typically seen

“This is a different and novel way we’re seeing abuse that can be pretty hard to detect,” Mandiant researcher Yash Gupta said in an interview. “This is something in malware we have not typically seen. It’s pretty interesting for us and something we wanted to call out.”

The image posted on Ars appeared in the about profile of a user who created an account on November 23. An Ars representative said the photo, showing a pizza and captioned “I love pizza,” was removed by Ars staff on December 16 after being tipped off by email from an unknown party. The Ars profile used an embedded URL that pointed to the image, which was automatically populated into the about page. The malicious base 64 encoding appeared immediately following the legitimate part of the URL. The string didn’t generate any errors or prevent the page from loading.

Mandiant researchers said there were no consequences for people who may have viewed the image, either as displayed on the Ars page or on the website that hosted it. It’s also not clear that any Ars users visited the about page.

Devices that were infected by the first stage automatically accessed the malicious string at the end of the URL. From there, they were infected with a second stage.

The video on Vimeo worked similarly, except that the string was included in the video description.

Ars representatives had nothing further to add. Vimeo representatives didn’t immediately respond to an email.

The campaign came from a threat actor Mandiant tracks as UNC4990, which has been active since at least 2020 and bears the hallmarks of being motivated by financial gain. The group has already used a separate novel technique to fly under the radar. That technique spread the second stage using a text file that browsers and normal text editors showed to be blank.

Opening the same file in a hex editor—a tool for analyzing and forensically investigating binary files—showed that a combination of tabs, spaces, and new lines were arranged in a way that encoded executable code. Like the technique involving Ars and Vimeo, the use of such a file is something the Mandiant researchers had never seen before. Previously, UNC4990 used GitHub and GitLab.

The initial stage of the malware was transmitted by infected USB drives. The drives installed a payload Mandiant has dubbed explorerps1. Infected devices then automatically reached out to either the malicious text file or else to the URL posted on Ars or the video posted to Vimeo. The base 64 strings in the image URL or video description, in turn, caused the malware to contact a site hosting the second stage. The second stage of the malware, tracked as Emptyspace, continuously polled a command-and-control server that, when instructed, would download and execute a third stage.

Mandiant has observed the installation of this third stage in only one case. This malware acts as a backdoor the researchers track as Quietboard. The backdoor, in that case, went on to install a cryptocurrency miner.

Anyone who is concerned they may have been infected by any of the malware covered by Mandiant can check the indicators of compromise section in Tuesday’s post.

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ChatGPT is leaking passwords from private conversations of its users, Ars reader says

AI, Biz & IT, chatgpt, openai, privacy, Security / Kelly Newman / January 29, 2024

OPENAI SPRINGS A LEAK —

Names of unpublished research papers, presentations, and PHP scripts also leaked.

Dan Goodin – Jan 30, 2024 1: 43 am UTC

Getty Images

ChatGPT is leaking private conversations that include login credentials and other personal details of unrelated users, screenshots submitted by an Ars reader on Monday indicated.

Two of the seven screenshots the reader submitted stood out in particular. Both contained multiple pairs of usernames and passwords that appeared to be connected to a support system used by employees of a pharmacy prescription drug portal. An employee using the AI chatbot seemed to be troubleshooting problems that encountered while using the portal.

“Horrible, horrible, horrible”

“THIS is so f-ing insane, horrible, horrible, horrible, i cannot believe how poorly this was built in the first place, and the obstruction that is being put in front of me that prevents it from getting better,” the user wrote. “I would fire [redacted name of software] just for this absurdity if it was my choice. This is wrong.”

Besides the candid language and the credentials, the leaked conversation includes the name of the app the employee is troubleshooting and the store number where the problem occurred.

The entire conversation goes well beyond what’s shown in the redacted screenshot above. A link Ars reader Chase Whiteside included showed the chat conversation in its entirety. The URL disclosed additional credential pairs.

The results appeared Monday morning shortly after reader Whiteside had used ChatGPT for an unrelated query.

“I went to make a query (in this case, help coming up with clever names for colors in a palette) and when I returned to access moments later, I noticed the additional conversations,” Whiteside wrote in an email. “They weren’t there when I used ChatGPT just last night (I’m a pretty heavy user). No queries were made—they just appeared in my history, and most certainly aren’t from me (and I don’t think they’re from the same user either).”

Other conversations leaked to Whiteside include the name of a presentation someone was working on, details of an unpublished research proposal, and a script using the PHP programming language. The users for each leaked conversation appeared to be different and unrelated to each other. The conversation involving the prescription portal included the year 2020. Dates didn’t appear in the other conversations.

The episode, and others like it, underscore the wisdom of stripping out personal details from queries made to ChatGPT and other AI services whenever possible. Last March, ChatGPT maker OpenAI took the AI chatbot offline after a bug caused the site to show titles from one active user’s chat history to unrelated users.

In November, researchers published a paper reporting how they used queries to prompt ChatGPT into divulging email addresses, phone and fax numbers, physical addresses, and other private data that was included in material used to train the ChatGPT large language model.

Concerned about the possibility of proprietary or private data leakage, companies, including Apple, have restricted their employees’ use of ChatGPT and similar sites.

As mentioned in an article from December when multiple people found that Ubiquity’s UniFy devices broadcasted private video belonging to unrelated users, these sorts of experiences are as old as the Internet is. As explained in the article:

The precise root causes of this type of system error vary from incident to incident, but they often involve “middlebox” devices, which sit between the front- and back-end devices. To improve performance, middleboxes cache certain data, including the credentials of users who have recently logged in. When mismatches occur, credentials for one account can be mapped to a different account.

An OpenAI representative said the company was investigating the report.

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Beware of scammers sending live couriers to liquidate victims’ life savings

Security / Kelly Newman / January 29, 2024

CONFIDENCE GAMES —

The scams sound easy to detect, but they steal billions of dollars, often from the elderly.

Dan Goodin – Jan 29, 2024 9: 33 pm UTC

Scammers are stepping up their game by sending couriers to the homes of elderly people and others as part of a ruse intended to rob them of their life savings, the FBI said in an advisory Monday.

“The FBI is warning the public about scammers instructing victims, many of whom are senior citizens, to liquidate their assets into cash and/or buy gold, silver, or other precious metals to protect their funds,” FBI officials with the agency’s Internet Crime Complaint Center said. “Criminals then arrange for couriers to meet the victims in person to pick up the cash or precious metals.”

The scammers pose as tech or customer support agents or government officials and sometimes use a multi-layered approach as they falsely claim they work on behalf of technology companies, financial institutions, or the US government. The scammers tell the targets they have been hacked or are at risk of being hacked and that their assets should be protected. The scammers then instruct the targets to liquidate assets into cash. In some cases, the scammers instruct targets to wire funds to a fake metal dealer who will ship purchased merchandise to the victims’ homes.

“Criminals then arrange for couriers to meet the victims in person to pick up the cash or precious metals,” Monday’s advisory warned.

Officials said that from May to December of last year, they tracked estimated aggregate losses topping $55 million from this sort of scam. More generally, the agency received 19,000 complaints of scams from January to June of 2023, with estimated victim losses of $542 million. Almost half of the victims were over 60 years old and accounted for 66 percent of the aggregated losses.

The types of scams included in Monday’s warning use tactics intended to coax the victim into developing trust and confidence in the perpetrators. The scammers promise to safeguard the assets in a protected account. In some cases, the scammers set a passcode with the target. If targets hand over money or other assets, they never hear from the scammers again.

Monday’s advisory comes four months after IC3 warned of an increase in complaints for what the agency calls “phantom hacker scams. This form of scam is an evolution of more traditional general tech ruses. They layer imposer tech support workers with workers from financial institutions and government agencies. Victims sometimes lose their entire holdings in bank, savings, retirement, or investment accounts.

Typically, the target receives a call from someone falsely claiming to work in tech or customer support from a known, reputable company and instructs the target to call a number for assistance resolving an imaginary problem. When a target calls, the scammer tricks the person into downloading and installing a program that gives remote access to the target’s device. The scammer then asks the target to open bank accounts or other types of accounts to investigate imaginary fraud. During this step, the scammer checks balances to see if there’s enough profit potential for follow-on activities.

In any follow-on activity, the scammers pose as either representatives of the financial institution or as an employee at the Federal Reserve or another US government agency. The scammers instruct the targets to wire money, in many cases directly to overseas recipients. The scammers may instruct the victim to send multiple transactions over a span of days or months. In the event the target grows suspicious, the scammers may send written correspondence over what appears to be official letterhead.

The IC3 recommends people follow these practices to prevent falling victim to such scams:

The US Government and legitimate businesses will never request you purchase gold or other precious metals.
Protect your personal information. Never disclose your home address or agree to meet with unknown individuals to deliver cash or precious metals.
Do not click on unsolicited pop-ups on your computer, links sent via text messages, or email links and attachments.
Do not contact unknown telephone numbers provided in pop-ups, texts, or emails.
Do not download software at the request of unknown individuals who contact you.
Do not allow unknown individuals access to your computer.

The FBI requests victims report these types of fraud or suspicious activities to the IC3 as soon as possible. Victims should include as much transaction information as possible:

The name of the person or company that contacted you.
Methods of communication used, including websites, emails, and telephone numbers.
Any bank account number that received any wired funds, along with the recipient name(s).
The name and location of any metal dealer companies and the account that received the wired funds.

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The life and times of Cozy Bear, the Russian hackers who just hit Microsoft and HPE

Biz & IT, breaches, cozy bear, hacking, hewlett packarge enterprise, microsoft, Security / Kelly Newman / January 27, 2024

FROM RUSSIA WITH ROOT —

Hacks by Kremlin-backed group continue to hit hard.

Dan Goodin – Jan 26, 2024 1: 15 pm UTC

Hewlett Packard Enterprise (HPE) said Wednesday that Kremlin-backed actors hacked into the email accounts of its security personnel and other employees last May—and maintained surreptitious access until December. The disclosure was the second revelation of a major corporate network breach by the hacking group in five days.

The hacking group that hit HPE is the same one that Microsoft said Friday broke into its corporate network in November and monitored email accounts of senior executives and security team members until being driven out earlier this month. Microsoft tracks the group as Midnight Blizzard. (Under the company’s recently retired threat actor naming convention, which was based on chemical elements, the group was known as Nobelium.) But it is perhaps better known by the name Cozy Bear—though researchers have also dubbed it APT29, the Dukes, Cloaked Ursa, and Dark Halo.

“On December 12, 2023, Hewlett Packard Enterprise was notified that a suspected nation-state actor, believed to be the threat actor Midnight Blizzard, the state-sponsored actor also known as Cozy Bear, had gained unauthorized access to HPE’s cloud-based email environment,” company lawyers wrote in a filing with the Securities and Exchange Commission. “The Company, with assistance from external cybersecurity experts, immediately activated our response process to investigate, contain, and remediate the incident, eradicating the activity. Based on our investigation, we now believe that the threat actor accessed and exfiltrated data beginning in May 2023 from a small percentage of HPE mailboxes belonging to individuals in our cybersecurity, go-to-market, business segments, and other functions.”

An HPE representative said in an email that Cozy Bear’s initial entry into the network was through “a compromised, internal HPE Office 365 email account [that] was leveraged to gain access.” The representative declined to elaborate. The representative also declined to say how HPE discovered the breach.

Cozy Bear hacking its way into the email systems of two of the world’s most powerful companies and monitoring top employees’ accounts for months aren’t the only similarities between the two events. Both breaches also involved compromising a single device on each corporate network, then escalating that toehold to the network itself. From there, Cozy Bear camped out undetected for months. The HPE intrusion was all the more impressive because Wednesday’s disclosure said that the hackers also gained access to Sharepoint servers in May. Even after HPE detected and contained that breach a month later, it would take HPE another six months to discover the compromised email accounts.

The pair of disclosures, coming within five days of each other, may create the impression that there has been a recent flurry of hacking activity. But Cozy Bear has actually been one of the most active nation-state groups since at least 2010. In the intervening 14 years, it has waged an almost constant series of attacks, mostly on the networks of governmental organizations and the technology companies that supply them. Multiple intelligence services and private research companies have attributed the hacking group as an arm of Russia’s Foreign Intelligence Service, also known as the SVR.

The life and times of Cozy Bear (so far)

In its earliest years, Cozy Bear operated in relative obscurity—precisely the domain it prefers—as it hacked mostly Western governmental agencies and related organizations such as political think tanks and governmental subcontractors. In 2013, researchers from security firm Kaspersky unearthed MiniDuke, a sophisticated piece of malware that had taken hold of 60 government agencies, think tanks, and other high-profile organizations in 23 countries, including the US, Hungary, Ukraine, Belgium, and Portugal.

MiniDuke was notable for its odd combination of advanced programming and the gratuitous references to literature found embedded into its code. (It contained strings that alluded to Dante Alighieri’s Divine Comedy and to 666, the Mark of the Beast discussed in a verse from the Book of Revelation.) Written in assembly, employing multiple levels of encryption, and relying on hijacked Twitter accounts and automated Google searches to maintain stealthy communications with command-and-control servers, MiniDuke was among the most advanced pieces of malware found at the time.

It wasn’t immediately clear who was behind the mysterious malware—another testament to the stealth of its creators. In 2015, however, researchers linked MiniDuke—and seven other pieces of previously unidentified malware—to Cozy Bear. After a half-decade of lurking, the shadowy group was suddenly brought into the light of day.

Cozy Bear once again came to prominence the following year when researchers discovered the group (along with Fancy Bear, a separate Russian-state hacking group) inside the servers of the Democratic National Committee, looking for intelligence such as opposition research into Donald Trump, the Republican nominee for president at the time. The hacking group resurfaced in the days following Trump’s election victory that year with a major spear-phishing blitz that targeted dozens of organizations in government, military, defense contracting, media, and other industries.

One of Cozy Bear’s crowning achievements came in late 2020 with the discovery of an extensive supply chain attack that targeted customers of SolarWinds, the Austin, Texas, maker of network management tools. After compromising SolarWinds’ software build system, the hacking group pushed infected updates to roughly 18,000 customers. The hackers then used the updates to compromise nine federal agencies and about 100 private companies, White House officials have said.

Cozy Bear has remained active, with multiple campaigns coming to light in 2021, including one that used zero-day vulnerabilities to infect fully updated iPhones. Last year, the group devoted much of its time to hacks of Ukraine.

The life and times of Cozy Bear, the Russian hackers who just hit Microsoft and HPE Read More »

In major gaffe, hacked Microsoft test account was assigned admin privileges

Biz & IT, microsoft, network breaches, Security, system privileges / DJ Henderson / January 26, 2024

The hackers who recently broke into Microsoft’s network and monitored top executives’ email for two months did so by gaining access to an aging test account with administrative privileges, a major gaffe on the company’s part, a researcher said.

The new detail was provided in vaguely worded language included in a post Microsoft published on Thursday. It expanded on a disclosure Microsoft published late last Friday. Russia-state hackers, Microsoft said, used a technique known as password spraying to exploit a weak credential for logging into a “legacy non-production test tenant account” that wasn’t protected by multifactor authentication. From there, they somehow acquired the ability to access email accounts that belonged to senior executives and employees working in security and legal teams.

A “pretty big config error”

In Thursday’s post updating customers on findings from its ongoing investigation, Microsoft provided more details on how the hackers achieved this monumental escalation of access. The hackers, part of a group Microsoft tracks as Midnight Blizzard, gained persistent access to the privileged email accounts by abusing the OAuth authorization protcol, which is used industry-wide to allow an array of apps to access resources on a network. After compromising the test tenant, Midnight Blizzard used it to create a malicious app and assign it rights to access every email address on Microsoft’s Office 365 email service.

In Thursday’s update, Microsoft officials said as much, although in language that largely obscured the extent of the major blunder. They wrote:

Threat actors like Midnight Blizzard compromise user accounts to create, modify, and grant high permissions to OAuth applications that they can misuse to hide malicious activity. The misuse of OAuth also enables threat actors to maintain access to applications, even if they lose access to the initially compromised account. Midnight Blizzard leveraged their initial access to identify and compromise a legacy test OAuth application that had elevated access to the Microsoft corporate environment. The actor created additional malicious OAuth applications. They created a new user account to grant consent in the Microsoft corporate environment to the actor controlled malicious OAuth applications. The threat actor then used the legacy test OAuth application to grant them the Office 365 Exchange Online full_access_as_app role, which allows access to mailboxes. [Emphasis added.]

Kevin Beaumont—a researcher and security professional with decades of experience, including a stint working for Microsoft—pointed out on Mastodon that the only way for an account to assign the all-powerful full_access_as_app role to an OAuth app is for the account to have administrator privileges. “Somebody,” he said, “made a pretty big config error in production.”

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Mass exploitation of Ivanti VPNs is infecting networks around the globe

Biz & IT, espionage, hacking, ivanti, Security, vpns / Mike M. / January 23, 2024

THIS IS NOT A DRILL —

Orgs that haven’t acted yet should, even if it means suspending VPN services.

Dan Goodin – Jan 24, 2024 1: 36 am UTC

Enlarge / Cybercriminals or anonymous hackers use malware on mobile phones to hack personal and business passwords online.

Getty Images

Hackers suspected of working for the Chinese government are mass exploiting a pair of critical vulnerabilities that give them complete control of virtual private network appliances sold by Ivanti, researchers said.

As of Tuesday morning, security company Censys detected 492 Ivanti VPNs that remained infected out of 26,000 devices exposed to the Internet. More than a quarter of the compromised VPNs—121—resided in the US. The three countries with the next biggest concentrations were Germany, with 26, South Korea, with 24, and China, with 21.

Microsoft’s customer cloud service hosted the most infected devices with 13, followed by cloud environments from Amazon with 12, and Comcast at 10.

“We conducted a secondary scan on all Ivanti Connect Secure servers in our dataset and found 412 unique hosts with this backdoor, Censys researchers wrote. “Additionally, we found 22 distinct ‘variants’ (or unique callback methods), which could indicate multiple attackers or a single attacker evolving their tactics.”

In an email, members of the Censys research team said evidence suggests that the people infecting the devices are motivated by espionage objectives. That theory aligns with reports published recently by security firms Volexity and Mandiant. Volexity researchers said they suspect the threat actor, tracked as UTA0178, is a “Chinese nation-state-level threat actor.” Mandiant, which tracks the attack group as UNC5221, said the hackers are pursuing an “espionage-motivated APT campaign.”

All civilian governmental agencies have been mandated to take corrective action to prevent exploitation. Federal Civilian Executive Branch agencies had until 11: 59 pm Monday to follow the mandate, which was issued Friday by the Cybersecurity and Infrastructure Security Agency. Ivanti has yet to release patches to fix the vulnerabilities. In their absence, Ivanti, CISA, and security companies are urging affected users to follow mitigation and recovery guidance provided by Ivanti that include preventative measures to block exploitation and steps for customers to rebuild and upgrade their systems if they detect exploitation.

“This directive is no surprise, considering the worldwide mass exploitation observed since Ivanti initially revealed the vulnerabilities on January 10,” Censys researchers wrote. “These vulnerabilities are particularly serious given the severity, widespread exposure of these systems, and the complexity of mitigation—especially given the absence of an official patch from the vendor as of the current writing.

When Avanti disclosed the vulnerabilities on January 10, the company said it would release patches on a staggered basis starting this week. The company has not issued a public statement since confirming the patch was still on schedule.

VPNs are an ideal device for hackers to infect because the always-on appliances sit at the very edge of the network, where they accept incoming connections. Because the VPNs must communicate with broad parts of the internal network, hackers who compromise the devices can then expand their presence to other areas. When exploited in unison, the vulnerabilities, tracked as CVE-2023-46805 and CVE-2024-21887, allow attackers to remotely execute code on servers. All supported versions of the Ivanti Connect Secure—often abbreviated as ICS and formerly known as Pulse Secure—are affected.

The ongoing attacks use the exploits to install a host of malware that acts as a backdoor. The hackers then use the malware to harvest as many credentials as possible belonging to various employees and devices on the infected network and to rifle around the network. Despite the use of this malware, the attackers largely employ an approach known as “living off the land,” which uses legitimate software and tools so they’re harder to detect.

The posts linked above from Volexity and Mandiant provide extensive descriptions of how the malware behaves and methods for detecting infections.

Given the severity of the vulnerabilities and the consequences that follow when they’re exploited, all users of affected products should prioritize mitigation of these vulnerabilities, even if that means temporarily suspending VPN usage.

Mass exploitation of Ivanti VPNs is infecting networks around the globe Read More »

HP CEO evokes James Bond-style hack via ink cartridges

class action, HP, Policy, printers, Security, Tech / Kelly Newman / January 22, 2024

Last Thursday, HP CEO Enrique Lores addressed the company’s controversial practice of bricking printers when users load them with third-party ink. Speaking to CNBC Television, he said, “We have seen that you can embed viruses in the cartridges. Through the cartridge, [the virus can] go to the printer, [and then] from the printer, go to the network.”

That frightening scenario could help explain why HP, which was hit this month with another lawsuit over its Dynamic Security system, insists on deploying it to printers.

Dynamic Security stops HP printers from functioning if an ink cartridge without an HP chip or HP electronic circuitry is installed. HP has issued firmware updates that block printers with such ink cartridges from printing, leading to the above lawsuit (PDF), which is seeking class-action certification. The suit alleges that HP printer customers were not made aware that printer firmware updates issued in late 2022 and early 2023 could result in printer features not working. The lawsuit seeks monetary damages and an injunction preventing HP from issuing printer updates that block ink cartridges without an HP chip.

But are hacked ink cartridges something we should actually be concerned about?

To investigate, I turned to Ars Technica Senior Security Editor Dan Goodin. He told me that he didn’t know of any attacks actively used in the wild that are capable of using a cartridge to infect a printer.

Goodin also put the question to Mastodon, and cybersecurity professionals, many with expertise in embedded-device hacking, were decidedly skeptical.

Another commenter, going by Graham Sutherland / Polynomial on Mastodon, referred to serial presence detect (SPD) electrically erasable programmable read-only memory (EEPROM), a form of flash memory used extensively in ink cartridges, saying:

I’ve seen and done some truly wacky hardware stuff in my life, including hiding data in SPD EEPROMs on memory DIMMs (and replacing them with microcontrollers for similar shenanigans), so believe me when I say that his claim is wildly implausible even in a lab setting, let alone in the wild, and let alone at any scale that impacts businesses or individuals rather than selected political actors.

HP’s evidence

Unsurprisingly, Lores’ claim comes from HP-backed research. The company’s bug bounty program tasked researchers from Bugcrowd with determining if it’s possible to use an ink cartridge as a cyberthreat. HP argued that ink cartridge microcontroller chips, which are used to communicate with the printer, could be an entryway for attacks.

As detailed in a 2022 article from research firm Actionable Intelligence, a researcher in the program found a way to hack a printer via a third-party ink cartridge. The researcher was reportedly unable to perform the same hack with an HP cartridge.

Shivaun Albright, HP’s chief technologist of print security, said at the time:

A researcher found a vulnerability over the serial interface between the cartridge and the printer. Essentially, they found a buffer overflow. That’s where you have got an interface that you may not have tested or validated well enough, and the hacker was able to overflow into memory beyond the bounds of that particular buffer. And that gives them the ability to inject code into the device.

Albright added that the malware “remained on the printer in memory” after the cartridge was removed.

HP acknowledges that there’s no evidence of such a hack occurring in the wild. Still, because chips used in third-party ink cartridges are reprogrammable (their “code can be modified via a resetting tool right in the field,” according to Actionable Intelligence), they’re less secure, the company says. The chips are said to be programmable so that they can still work in printers after firmware updates.

HP also questions the security of third-party ink companies’ supply chains, especially compared to its own supply chain security, which is ISO/IEC-certified.

So HP did find a theoretical way for cartridges to be hacked, and it’s reasonable for the company to issue a bug bounty to identify such a risk. But its solution for this threat was announced before it showed there could be a threat. HP added ink cartridge security training to its bug bounty program in 2020, and the above research was released in 2022. HP started using Dynamic Security in 2016, ostensibly to solve the problem that it sought to prove exists years later.

Further, there’s a sense from cybersecurity professionals that Ars spoke with that even if such a threat exists, it would take a high level of resources and skills, which are usually reserved for targeting high-profile victims. Realistically, the vast majority of individual consumers and businesses shouldn’t have serious concerns about ink cartridges being used to hack their machines.

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Microsoft network breached through password-spraying by Russian-state hackers

Biz & IT, kremlin, microsoft, russian hacking, Security / DJ Henderson / January 20, 2024

Russia-state hackers exploited a weak password to compromise Microsoft’s corporate network and accessed emails and documents that belonged to senior executives and employees working in security and legal teams, Microsoft said late Friday.

The attack, which Microsoft attributed to a Kremlin-backed hacking group it tracks as Midnight Blizzard, is at least the second time in as many years that failures to follow basic security hygiene has resulted in a breach that has the potential to harm customers. One paragraph in Friday’s disclosure, filed with the Securities and Exchange Commission, was gobsmacking:

Beginning in late November 2023, the threat actor used a password spray attack to compromise a legacy non-production test tenant account and gain a foothold, and then used the account’s permissions to access a very small percentage of Microsoft corporate email accounts, including members of our senior leadership team and employees in our cybersecurity, legal, and other functions, and exfiltrated some emails and attached documents. The investigation indicates they were initially targeting email accounts for information related to Midnight Blizzard itself. We are in the process of notifying employees whose email was accessed.

Microsoft didn’t detect the breach until January 12, exactly a week before Friday’s disclosure. Microsoft’s account raises the prospect that the Russian hackers had uninterrupted access to the accounts for as long as two months.

A translation of the 93 words quoted above: A device inside Microsoft’s network was protected by a weak password with no form of two-factor authentication employed. The Russian adversary group was able to guess it by peppering it with previously compromised or commonly used passwords until they finally landed on the right one. The threat actor then accessed the account, indicating that either 2FA wasn’t employed or the protection was somehow bypassed.

Furthermore, this “legacy non-production test tenant account” was somehow configured so that Midnight Blizzard could pivot and gain access to some of the company’s most senior and sensitive employee accounts.

As Steve Bellovin, a computer science professor and affiliate law prof at Columbia University with decades of experience in cybersecurity, wrote on Mastodon:

A lot of fascinating implications here. A successful password spray attack suggests no 2FA and either reused or weak passwords. Access to email accounts belonging to “senior leadership… cybersecurity, and legal” teams using just the permissions of a “test tenant account” suggests that someone gave that test account amazing privileges. Why? Why wasn’t it removed when the test was over? I also note that it took Microsoft about seven weeks to detect the attack.

While Microsoft said that it wasn’t aware of any evidence that Midnight Blizzard gained access to customer environments, production systems, source code, or AI systems, some researchers voiced doubts, particularly about whether the Microsoft 365 service might be or have been susceptible to similar attack techniques. One of the researchers was Kevin Beaumont, who has had a long cybersecurity career that has included a stint working for Microsoft. On LinkedIn, he wrote:

Microsoft staff use Microsoft 365 for email. SEC filings and blogs with no details on Friday night are great.. but they’re going to have to be followed with actual detail. The age of Microsoft doing tents, incident code words, CELA’ing things and pretending MSTIC sees everything (threat actors have Macs too) are over — they need to do radical technical and cultural transformation to retain trust.

CELA is short for Corporate, External, and Legal Affairs, a group inside Microsoft that helps draft disclosures. MSTIC stands for the Microsoft Threat Intelligence Center.

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Just 10 lines of code can steal AI secrets from Apple, AMD, and Qualcomm GPUs

AI, data leaks, GPU, LLMs, Security, syndication / Mike M. / January 17, 2024

massive leakage —

Patching all affected devices, which include some Macs and iPhones, may be tough.

Lily Hay Newman, wired.com – Jan 17, 2024 6: 15 pm UTC

As more companies ramp up development of artificial intelligence systems, they are increasingly turning to graphics processing unit (GPU) chips for the computing power they need to run large language models (LLMs) and to crunch data quickly at massive scale. Between video game processing and AI, demand for GPUs has never been higher, and chipmakers are rushing to bolster supply. In new findings released today, though, researchers are highlighting a vulnerability in multiple brands and models of mainstream GPUs—including Apple, Qualcomm, and AMD chips—that could allow an attacker to steal large quantities of data from a GPU’s memory.

The silicon industry has spent years refining the security of central processing units, or CPUs, so they don’t leak data in memory even when they are built to optimize for speed. However, since GPUs were designed for raw graphics processing power, they haven’t been architected to the same degree with data privacy as a priority. As generative AI and other machine learning applications expand the uses of these chips, though, researchers from New York-based security firm Trail of Bits say that vulnerabilities in GPUs are an increasingly urgent concern.

“There is a broader security concern about these GPUs not being as secure as they should be and leaking a significant amount of data,” Heidy Khlaaf, Trail of Bits’ engineering director for AI and machine learning assurance, tells WIRED. “We’re looking at anywhere from 5 megabytes to 180 megabytes. In the CPU world, even a bit is too much to reveal.”

To exploit the vulnerability, which the researchers call LeftoverLocals, attackers would need to already have established some amount of operating system access on a target’s device. Modern computers and servers are specifically designed to silo data so multiple users can share the same processing resources without being able to access each others’ data. But a LeftoverLocals attack breaks down these walls. Exploiting the vulnerability would allow a hacker to exfiltrate data they shouldn’t be able to access from the local memory of vulnerable GPUs, exposing whatever data happens to be there for the taking, which could include queries and responses generated by LLMs as well as the weights driving the response.

In their proof of concept, as seen in the GIF below, the researchers demonstrate an attack where a target—shown on the left—asks the open source LLM Llama.cpp to provide details about WIRED magazine. Within seconds, the attacker’s device—shown on the right—collects the majority of the response provided by the LLM by carrying out a LeftoverLocals attack on vulnerable GPU memory. The attack program the researchers created uses less than 10 lines of code.

An attacker (right) exploits the LeftoverLocals vulnerability to listen to LLM conversations.

Last summer, the researchers tested 11 chips from seven GPU makers and multiple corresponding programming frameworks. They found the LeftoverLocals vulnerability in GPUs from Apple, AMD, and Qualcomm and launched a far-reaching coordinated disclosure of the vulnerability in September in collaboration with the US-CERT Coordination Center and the Khronos Group, a standards body focused on 3D graphics, machine learning, and virtual and augmented reality.

The researchers did not find evidence that Nvidia, Intel, or Arm GPUs contain the LeftoverLocals vulnerability, but Apple, Qualcomm, and AMD all confirmed to WIRED that they are impacted. This means that well-known chips like the AMD Radeon RX 7900 XT and devices like Apple’s iPhone 12 Pro and M2 MacBook Air are vulnerable. The researchers did not find the flaw in the Imagination GPUs they tested, but others may be vulnerable.

Just 10 lines of code can steal AI secrets from Apple, AMD, and Qualcomm GPUs Read More »

Apple AirDrop leaks user data like a sieve. Chinese authorities say they’re scooping it up.

AirDrop, Apple, Biz & IT, cryptographic hashes, privacy, Security / DJ Henderson / January 12, 2024

Chinese authorities recently said they’re using an advanced encryption attack to de-anonymize users of AirDrop in an effort to crack down on citizens who use the Apple file-sharing feature to mass-distribute content that’s outlawed in that country.

According to a 2022 report from The New York Times, activists have used AirDrop to distribute scathing critiques of the Communist Party of China to nearby iPhone users in subway trains and stations and other public venues. A document one protester sent in October of that year called General Secretary Xi Jinping a “despotic traitor.” A few months later, with the release of iOS 16.1.1, the AirDrop users in China found that the “everyone” configuration, the setting that makes files available to all other users nearby, automatically reset to the more contacts-only setting. Apple has yet to acknowledge the move. Critics continue to see it as a concession Apple CEO Tim Cook made to Chinese authorities.

The rainbow connection

On Monday, eight months after the half-measure was put in place, officials with the local government in Beijing said some people have continued mass-sending illegal content. As a result, the officials said, they were now using an advanced technique publicly disclosed in 2021 to fight back.

“Some people reported that their iPhones received a video with inappropriate remarks in the Beijing subway,” the officials wrote, according to translations. “After preliminary investigation, the police found that the suspect used the AirDrop function of the iPhone to anonymously spread the inappropriate information in public places. Due to the anonymity and difficulty of tracking AirDrop, some netizens have begun to imitate this behavior.”

In response, the authorities said they’ve implemented the technical measures to identify the people mass-distributing the content.

Screenshot showing log files containing the hashes to be extracted
Screenshot showing a dedicated tool converting extracted AirDrop hashes.

The scant details and the quality of Internet-based translations don’t explicitly describe the technique. All the translations, however, have said it involves the use of what are known as rainbow tables to defeat the technical measures AirDrop uses to obfuscate users’ phone numbers and email addresses.

Rainbow tables were first proposed in 1980 as a means for vastly reducing what at the time was the astronomical amount of computing resources required to crack at-scale hashes, the one-way cryptographic representations used to conceal passwords and other types of sensitive data. Additional refinements made in 2003 made rainbow tables more useful still.

When AirDrop is configured to distribute files only between people who know each other, Apple says, it relies heavily on hashes to conceal the real-world identities of each party until the service determines there’s a match. Specifically, AirDrop broadcasts Bluetooth advertisements that contain a partial cryptographic hash of the sender’s phone number and/or email address.

If any of the truncated hashes match any phone number or email address in the address book of the other device, or if the devices are set to send or receive from everyone, the two devices will engage in a mutual authentication handshake. When the hashes match, the devices exchange the full SHA-256 hashes of the owners’ phone numbers and email addresses. This technique falls under an umbrella term known as private set intersection, often abbreviated as PSI.

In 2021, researchers at Germany’s Technical University of Darmstadt reported that they had devised practical ways to crack what Apple calls the identity hashes used to conceal identities while AirDrop determines if a nearby person is in the contacts of another. One of the researchers’ attack methods relies on rainbow tables.

Apple AirDrop leaks user data like a sieve. Chinese authorities say they’re scooping it up. Read More »

Linux devices are under attack by a never-before-seen worm

Biz & IT, botnet, botnets, Internet of things, mirai, Security / DJ Henderson / January 10, 2024

NEW WORM ON THE BLOCK —

Based on Mirai malware, self-replicating NoaBot installs cryptomining app on infected devices.

Dan Goodin – Jan 10, 2024 4: 12 pm UTC

For the past year, previously unknown self-replicating malware has been compromising Linux devices around the world and installing cryptomining malware that takes unusual steps to conceal its inner workings, researchers said.

The worm is a customized version of Mirai, the botnet malware that infects Linux-based servers, routers, web cameras, and other so-called Internet of Things devices. Mirai came to light in 2016 when it was used to deliver record-setting distributed denial-of-service attacks that paralyzed key parts of the Internet that year. The creators soon released the underlying source code, a move that allowed a wide array of crime groups from around the world to incorporate Mirai into their own attack campaigns. Once taking hold of a Linux device, Mirai uses it as a platform to infect other vulnerable devices, a design that makes it a worm, meaning it self-replicates.

Dime-a-dozen malware with a twist

Traditionally, Mirai and its many variants have spread when one infected device scans the Internet looking for other devices that accept Telnet connections. The infected devices then attempt to crack the telnet password by guessing default and commonly used credential pairs. When successful, the newly infected devices target additional devices using the same technique. Mirai has primarily been used to wage DDoSes. Given the large amounts of bandwidth available to many such devices, the floods of junk traffic are often huge, giving the botnet as a whole tremendous power.

On Wednesday, researchers from network security and reliability firm Akamai revealed that a previously unknown Mirai-based network they dubbed NoaBot has been targeting Linux devices since at least last January. Instead of targeting weak telnet passwords, the NoaBot targets weak passwords connecting SSH connections. Another twist: Rather than performing DDoSes, the new botnet installs cryptocurrency mining software, which allows the attackers to generate digital coins using victims’ computing resources, electricity, and bandwidth. The cryptominer is a modified version of XMRig, another piece of open source malware. More recently, NoaBot has been used to also deliver P2PInfect, a separate worm researchers from Palo Alto Networks revealed last July.

Akamai has been monitoring NoaBot for the past 12 months in a honeypot that mimics real Linux devices to track various attacks circulating in the wild. To date, attacks have originated from 849 distinct IP addresses, almost all of which are likely hosting a device that’s already infected. The following figure tracks the number of attacks delivered to the honeypot over the past year.

Enlarge / Noabot malware activity over time.

“On the surface, NoaBot isn’t a very sophisticated campaign—it’s ‘just’ a Mirai variant and an XMRig cryptominer, and they’re a dime a dozen nowadays,” Akamai Senior Security Researcher Stiv Kupchik wrote in a report Wednesday. “However, the obfuscations added to the malware and the additions to the original source code paint a vastly different picture of the threat actors’ capabilities.”

The most advanced capability is how NoaBot installs the XMRig variant. Typically, when crypto miners are installed, the wallets’ funds are distributed to are specified in configuration settings delivered in a command line issued to the infected device. This approach has long posed a risk to threat actors because it allows researchers to track where the wallets are hosted and how much money has flowed into them.

NoaBot uses a novel technique to prevent such detection. Instead of delivering the configuration settings through a command line, the botnet stores the settings in encrypted or obfuscated form and decrypts them only after XMRig is loaded into memory. The botnet then replaces the internal variable that normally would hold the command line configuration settings and passes control to the XMRig source code.

Kupchik offered a more technical and detailed description:

In the XMRig open source code, miners can accept configurations in one of two ways — either via the command line or via environment variables. In our case, the threat actors chose not to modify the XMRig original code and instead added parts before the main function. To circumvent the need for command line arguments (which can be an indicator of compromise IOC and alert defenders), the threat actors had the miner replace its own command line (in technical terms, replacing argv) with more “meaningful” arguments before passing control to the XMRig code. The botnet runs the miner with (at most) one argument that tells it to print its logs. Before replacing its command line, however, the miner has to build its configuration. First, it copies basic arguments that are stored plaintext— the rig-id flag, which identifies the miner with three random letters, the threads flags, and a placeholder for the pool’s IP address (Figure 7).

Curiously, because the configurations are loaded via the xmm registers, IDA actually misses the first two loaded arguments, which are the binary name and the pool IP placeholder.

Enlarge / NoaBot code that copies miner configurations

Akamai

Next, the miner decrypts the pool’s domain name. The domain name is stored, encrypted, in a few data blocks that are decrypted via XOR operations. Although XMRig can work with a domain name, the attackers decided to go the extra step, and implemented their own DNS

resolution function. They communicate directly with Google’s DNS server (8.8.8.8) and parse its response to resolve the domain name to an IP address.

The last part of the configuration is also encrypted in a similar way, and it is the passkey for the miner to connect to the pool. All in all, the total configuration of the miner looks something like this:

-o --rig-id --threads –pass espana*tea

Notice anything missing? Yep, no wallet address.

We believe that the threat actors chose to run their own private pool instead of a public one, thereby eliminating the need to specify a wallet (their pool, their rules!). However, in our samples, we observed that miner’s domains were not resolving with Google’s DNS, so we can’t really prove our theory or gather more data from the pool, since the domains we have are no longer resolvable. We haven’t seen any recent incident that drops the miner, so it could also be that the threat actors decided to depart for greener pastures

Linux devices are under attack by a never-before-seen worm Read More »

Hackers can infect network-connected wrenches to install ransomware

Biz & IT, hack, ransomware, Security / DJ Henderson / January 9, 2024

TORQUE THIS —

Researchers identify 23 vulnerabilities, some of which can exploited with no authentication.

Dan Goodin – Jan 9, 2024 2: 00 pm UTC

Enlarge / The Rexroth Nutrunner, a line of torque wrench sold by Bosch Rexroth.

Bosch Rexroth

Researchers have unearthed nearly two dozen vulnerabilities that could allow hackers to sabotage or disable a popular line of network-connected wrenches that factories around the world use to assemble sensitive instruments and devices.

The vulnerabilities, reported Tuesday by researchers from security firm Nozomi, reside in the Bosch Rexroth Handheld Nutrunner NXA015S-36V-B. The cordless device, which wirelessly connects to the local network of organizations that use it, allows engineers to tighten bolts and other mechanical fastenings to precise torque levels that are critical for safety and reliability. When fastenings are too loose, they risk causing the device to overheat and start fires. When too tight, threads can fail and result in torques that are too loose. The Nutrunner provides a torque-level indicator display that’s backed by a certification from the Association of German Engineers and adopted by the automotive industry in 1999. The NEXO-OS, the firmware running on devices, can be controlled using a browser-based management interface.

NEXO-OS's management web application. — Enlarge / NEXO-OS’s management web application.

Nozomi

Nozomi researchers said the device is riddled with 23 vulnerabilities that, in certain cases, can be exploited to install malware. The malware could then be used to disable entire fleets of the devices or to cause them to tighten fastenings too loosely or tightly while the display continues to indicate the critical settings are still properly in place. B

Bosch officials emailed a statement that included the usual lines about security being a top priority. It went on to say that Nozomi reached out a few weeks ago to reveal the vulnerabilities. “Bosch Rexroth immediately took up this advice and is working on a patch to solve the problem,” the statement said. “This patch will be released at the end of January 2024.”

In a post, Nozomi researchers wrote:

The vulnerabilities found on the Bosch Rexroth NXA015S-36V-B allow an unauthenticated attacker who is able to send network packets to the target device to obtain remote execution of arbitrary code (RCE) with root privileges, completely compromising it. Once this unauthorized access is gained, numerous attack scenarios become possible. Within our lab environment, we successfully reconstructed the following two scenarios:

Ransomware: we were able to make the device completely inoperable by preventing a local operator from controlling the drill through the onboard display and disabling the trigger button. Furthermore, we could alter the graphical user interface (GUI) to display an arbitrary message on the screen, requesting the payment of a ransom. Given the ease with which this attack can be automated across numerous devices, an attacker could swiftly render all tools on a production line inaccessible, potentially causing significant disruptions to the final asset owner.

Enlarge / A PoC ransomware running on the test nutrunner.

Nozomi

Manipulation of Control and View: we managed to stealthily alter the configuration of tightening programs, such as by increasing or decreasing the target torque value. At the same time, by patching in-memory the GUI on the onboard display, we could show a normal value to the operator, who would remain completely unaware of the change.

A manipulation of view attack. The actual torque applied in this tightening was 0.15 Nm.

Hackers can infect network-connected wrenches to install ransomware Read More »