Mar 28, 2024NewsroomTechnology / Data Privacy

In June 2017, a study of more than 3,000 Massachusetts Institute of Technology (MIT) students published by the National Bureau for Economic Research (NBER) found that 98% of them were willing to give away their friends’ email addresses in exchange for free pizza.

“Whereas people say they care about privacy, they are willing to relinquish private data quite easily when incentivized to do so,” the research said, pointing out a what’s called the privacy paradox.

Now, nearly seven years later, Telegram has introduced a new feature that gives some users a free premium membership in exchange for allowing the popular messaging app to use their phone numbers as a relay for sending one-time passwords (OTPs) to other users who are attempting to sign in to the platform.

The feature, called Peer-to-Peer Login (P2PL), is currently being tested in selected countries for Android users of Telegram. It was first spotted by tginfo in February 2024 (via @AssembleDebug).

According to Telegram’s Terms of Service, the phone number will be used to send no more than 150 OTP SMS messages – including international SMS – per month, incurring charges from the user’s mobile carrier or service provider.

That said, the popular messaging app notes that it “cannot prevent the OTP recipient from seeing your phone number upon receiving your SMS” and that it “will not be liable for any inconvenience, harassment or harm resulting from unwanted, unauthorized or illegal actions undertaken by users who became aware of your phone number through P2PL.”

Even worse, the mechanism – which largely relies on a honor system – doesn’t prohibit users from contacting strangers to whose number the OTP authentication SMS was sent, and vice versa, potentially leading to an increase in spam calls and texts.

Telegram said it reserves the right to unilaterally terminate an account from the P2PL program if participants are found sharing personal information about recipients. It also warns users not to contact any OTP recipients or reply to them even if they message them.

As of March 2024, Telegram has more than 900 million monthly active users. It launched the Premium subscription program in June 2022, allowing users to unlock additional features like 4 GB file uploads, faster downloads, and exclusive stickers and reactions.

With online services still relying on phone numbers to authenticate users, it’s worth keeping in mind the privacy and security risks that could arise from partaking in the experiment.

Meta in Legal Crosshairs for Intercepting Snapchat Traffic

The development comes as newly unsealed court documents in the U.S. alleged that Meta launched a secret project called Ghostbusters to intercept and decrypt the network traffic from people using Snapchat, YouTube and Amazon to help it understand user behavior and better compete with its rivals.

This was accomplished by leveraging custom apps from a VPN service called Onavo, which Facebook acquired in 2013 and shut down in 2019 after it came under scrutiny for using its products to track users’ web activity related to its competitors and secretly paying teens to capture their internet browsing patterns.

The data-interception scheme has been described as a “man-in-the-middle” approach, in which Facebook essentially paid people between ages 13 and 35 up to $20 per month plus referral fees for installing a market research app and giving it elevated access to inspect network traffic and analyze their internet usage.

The tactic relied on creating “fake digital certificates to impersonate trusted Snapchat, YouTube, and Amazon analytics servers to redirect and decrypt secure traffic from those apps for Facebook’s strategic analysis.”

The apps were distributed through beta testing services, such as Applause, BetaBound, and uTest, to conceal Facebook’s involvement. The program, which later became known as the In-App Action Panel (IAAP), ran from 2016 to 2018.

Meta, in its response, said there is no crime or fraud, and that “Snapchat’s own witness on advertising confirmed that Snap cannot ‘identify a single ad sale that [it] lost from Meta’s use of user research products,’ does not know whether other competitors collected similar information, and does not know whether any of Meta’s research provided Meta with a competitive advantage.”

Mar 02, 2024NewsroomCybercrime / Social Engineering

The U.S. Department of Justice (DoJ) on Friday unsealed an indictment against an Iranian national for his alleged involvement in a multi-year cyber-enabled campaign designed to compromise U.S. governmental and private entities.

More than a dozen entities are said to have been targeted, including the U.S. Departments of the Treasury and State, defense contractors that support U.S. Department of Defense programs, and an accounting firm and a hospitality company, both based in New York.

Alireza Shafie Nasab, 39, claimed to be a cybersecurity specialist for a company named Mahak Rayan Afraz while participating in a persistent campaign targeting the U.S. from at least in or about 2016 through or about April 2021.

“As alleged, Alireza Shafie Nasab participated in a cyber campaign using spear-phishing and other hacking techniques to infect more than 200,000 victim devices, many of which contained sensitive or classified defense information,” said U.S. Attorney Damian Williams for the Southern District of New York.

The spear-phishing campaigns were managed via a custom application that made it possible for Nasab and his co-conspirators to organize and deploy their attacks.

In one instance, the threat actors breached an administrator email account belonging to an unnamed defense contractor, subsequently leveraging the access to create rogue accounts and send out spear-phishing emails to employees of a different defense contractor and a consulting firm.

Outside of spear-phishing attacks, the conspirators have masqueraded as other people, typically women, to obtain the confidence of victims and deploy malware onto victim computers.

Nasab, while working for the front company, is believed to be responsible for procuring infrastructure utilized in the campaign by using the stolen identity of a real person in order to register a server and email accounts.

He has been charged with one count of conspiracy to commit computer fraud, one count of conspiracy to commit wire fraud, one count of wire fraud, and one count of aggravated identity theft. If convicted on all counts, Nasab could face up to 47 years in prison.

While Nasab remains at large, the U.S. State Department has announced monetary rewards of up to $10 million for information leading to the identification or location of Nasab.

Mahak Rayan Afraz (MRA) was first outed by Meta in July 2021 as a Tehran-based firm with ties to the Islamic Revolutionary Guard Corps (IRGC), Iran’s armed force charged with defending the country’s revolutionary regime.

The activity cluster, which also overlaps with Tortoiseshell, has been previously linked to elaborate social engineering campaigns, including posing as an aerobics instructor on Facebook in an attempt to infect the machine of an employee of an aerospace defense contractor with malware.

The development comes as German law enforcement announced the takedown of Crimemarket, a German-speaking illicit trading platform with over 180,000 users that specialized in the sale of narcotics, weapons, money laundering, and other criminal services.

Six people have been arrested in connection with the operation, counting a 23-year-old considered the main suspect, with authorities also seizing mobile phones, IT equipment, one kilogram of marijuana, ecstasy tablets, and €600,000 in cash.

The U.S. State Department has announced monetary rewards of up to $15 million for information that could lead to the identification of key leaders within the LockBit ransomware group and the arrest of any individual participating in the operation.

“Since January 2020, LockBit actors have executed over 2,000 attacks against victims in the United States, and around the world, causing costly disruptions to operations and the destruction or exfiltration of sensitive information,” the State Department said.

“More than $144 million in ransom payments have been made to recover from LockBit ransomware events.”

The development comes as a sweeping law enforcement operation led by the U.K. National Crime Agency (NCA) disrupted LockBit, a Russia-linked ransomware gang that has been active for more than four years, wreaking havoc on business and critical infrastructure entities around the world.

Ransomware-as-a-service (RaaS) operations like LockBit and others work by extorting companies by stealing their sensitive data and encrypting them, making it a lucrative business model for Russian e-crime groups that act with impunity by taking advantage of the fact that they are outside of the jurisdiction of Western law enforcement.

The core developers tend to tap into a network of affiliates who are recruited to carry out the attacks using LockBit’s malicious software and infrastructure. The affiliates, in turn, are known to purchase access to targets of interest using initial access brokers (IABs).

“LockBit rose to be the most prolific ransomware group since Conti departed the scene in mid-2022,” Chester Wisniewski, global field CTO at Sophos, said.

“The frequency of their attacks, combined with having no limits to what type of infrastructure they cripple has also made them the most destructive in recent years. Anything that disrupts their operations and sows distrust amongst their affiliates and suppliers is a huge win for law enforcement.”

LockBit is also known to be the first ransomware group to announce a bug bounty program in 2022, offering rewards of up to $1 million for finding security issues in website and locker software.

“LockBit’s operation grew in scale by consistently delivering new product features, providing good customer support, and at times, marketing stunts that included paying people to tattoo themselves with the group’s logo,” Intel 471 said.

“LockBit flipped the script, letting its affiliates collect the ransom and trusting them to pay it a portion. This made affiliates confident that they were not going to lose out on a payment, thus attracting more affiliates.”

SecureWorks Counter Threat Unit (CTU), which is tracking the group under the name Gold Mystic, said it investigated 22 compromises featuring LockBit ransomware from July 2020 through January 2024, some of which relied solely on data theft to extort victims.

The cybersecurity company further pointed out that LockBit’s practice of ceding control to its affiliates to handle ransom negotiation and payments allowed the syndicate to scale up and draw several affiliates over the years.

LockBit’s takedown followed a months-long investigation that commenced in April 2022, leading to the arrest of three affiliates in Poland and Ukraine, the indictment in the U.S. of two other alleged members, as well as the seizure of 34 servers and 1,000 decryption keys that can help victims recover their data without making any payment.

These arrests include a 38-year-old man in Warsaw and a “father and son” duo from Ukraine. LockBit is estimated to have employed about 194 affiliates between January 31, 2022, and February 5, 2024, with the actors using a bespoke data exfiltration tool known as StealBit.

“StealBit is an example of LockBit’s attempt to offer a full ‘one-stop shop’ service to its affiliates,” the NCA said, adding the executable is used to export the data through the affiliate’s own infrastructure before StealBit’s in a likely effort to evade detection.

That said, the fluid structure of these RaaS brands means that shutting them down may not decisively impact the criminal enterprise, allowing them to regroup and resurface under a different name. If the recent history of similar takedowns is any indication, it won’t be long before they rebrand and continue from where they left off.

“Comprehensive degradation of LockBit’s infrastructure will likely result in a short cessation in activity from LockBit operatives before they resume operations – either under the LockBit name or an alternative banner,” ZeroFox said.

“Even if we don’t always get a complete victory, like has happened with QakBot, imposing disruption, fueling their fear of getting caught and increasing the friction of operating their criminal syndicate is still a win,” Wisniewski added. “We must continue to band together to raise their costs ever higher until we can put all of them where they belong – in jail.”

Feb 16, 2024NewsroomEndpoint Security / Cryptocurrency

Several companies operating in the cryptocurrency sector are the target of a newly discovered Apple macOS backdoor codenamed RustDoor.

RustDoor was first documented by Bitdefender last week, describing it as a Rust-based malware capable of harvesting and uploading files, as well as gathering information about the infected machines. It’s distributed by masquerading itself as a Visual Studio update.

While prior evidence uncovered at least three different variants of the backdoor, the exact initial propagation mechanism remained unknown.

That said, the Romanian cybersecurity firm subsequently told The Hacker News that the malware was used as part of a targeted attack rather than a shotgun distribution campaign, noting that it found additional artifacts that are responsible for downloading and executing RustDoor.

“Some of these first stage downloaders claim to be PDF files with job offerings, but in reality, are scripts that download and execute the malware while also downloading and opening an innocuous PDF file that bills itself as a confidentiality agreement,” Bogdan Botezatu, director of threat research and reporting at Bitdefender, said.

Since then, three more malicious samples that act as first-stage payloads have come to light, each of them purporting to be a job offering. These ZIP archives predate the earlier RustDoor binaries by nearly a month.

The new component of the attack chain – i.e., the archive files (“Jobinfo.app.zip” or “Jobinfo.zip”) – contains a basic shell script that’s responsible for fetching the implant from a website named turkishfurniture[.]blog. It’s also engineered to preview a harmless decoy PDF file (“job.pdf”) hosted on the same site as a distraction.

Bitdefender said it also detected four new Golang-based binaries that communicate with an actor-controlled domain (“sarkerrentacars[.]com”), whose purpose is to “collect information about the victim’s machine and its network connections using the system_profiler and networksetup utilities, which are part of the macOS operating system.

In addition, the binaries are capable of extracting details about the disk via “diskutil list” as well as retrieving a wide list of kernel parameters and configuration values using the “sysctl -a” command.

A closer investigation of the command-and-control (C2) infrastructure has also revealed a leaky endpoint (“/client/bots”) that makes it possible to glean details about the currently infected victims, including the timestamps when the infected host was registered and the last activity was observed.

The development comes as South Korea’s National Intelligence Service (NIS) revealed that an IT organization affiliated with the Workers’ Party of North Korea’s Office No. 39 is generating illicit revenue by selling thousands of malware-laced gambling websites to other cybercriminals for stealing sensitive data from unsuspecting gamblers.

The company behind the malware-as-a-service (MaaS) scheme is Gyeongheung (also spelled Gyonghung), a 15-member entity based in Dandong that has allegedly received $5,000 from an unidentified South Korean criminal organization in exchange for creating a single website and $3,000 per month for maintaining the website, Yonhap News Agency reported.

The U.S. Department of State has announced monetary rewards of up to $10 million for information about individuals holding key positions within the Hive ransomware operation.

It is also giving away an additional $5 million for specifics that could lead to the arrest and/or conviction of any person “conspiring to participate in or attempting to participate in Hive ransomware activity.”

The multi-million-dollar rewards come a little over a year after a coordinated law enforcement effort covertly infiltrated and dismantled the darknet infrastructure associated with the Hive ransomware-as-a-service (RaaS) gang. One person with suspected ties to the group was arrested in Paris in December 2023.

Hive, which emerged in mid-2021, targeted more than 1,500 victims in over 80 countries, netting about $100 million in illegal revenues. In November 2023, Bitdefender revealed that a new ransomware group called Hunters International had acquired the source code and infrastructure from Hive to kick-start its own efforts.

There is some evidence to suggest that the threat actors associated with Hunters International are likely based in Nigeria, specifically an individual named Olowo Kehinde, per information gathered by Netenrich security researcher Rakesh Krishnan, although it could also be a fake persona adopted by the actors to cover up their true origins.

Blockchain analytics firm Chainalysis, in its 2023 review published last week, estimated that ransomware crews raked in $1.1 billion in extorted cryptocurrency payments from victims last year, compared to $567 million in 2022, all but confirming that ransomware rebounded in 2023 following a relative drop off in 2022.

“2023 marks a major comeback for ransomware, with record-breaking payments and a substantial increase in the scope and complexity of attacks — a significant reversal from the decline observed in 2022,” it said.

The decline in ransomware activity in 2022 has been deemed a statistical aberration, with the downturn attributed to the Russo-Ukrainian war and the disruption of Hive. What’s more, the total number of victims posted on data leak sites in 2023 was 4,496, up from 3,048 in 2021 and 2,670 in 2022.

Palo Alto Networks Unit 42, in its own analysis of ransomware gangs’ public listings of victims on dark web sites, called out manufacturing as the most impacted industry vertical in 2023, followed by profession and legal services, high technology, retail, construction, and healthcare sectors.

While the law enforcement action prevented approximately $130 million in ransom payments to Hive, it’s said that the takedown also “likely affected the broader activities of Hive affiliates, potentially lessening the number of additional attacks they could carry out.” In total, the effort may have averted at least $210.4 million in payments.

Adding to the escalation in the regularity, scope, and volume of attacks, last year also witnessed a surge in new entrants and offshoots, a sign that the ransomware ecosystem is attracting a steady stream of new players who are attracted by the prospect of high profits and lower barriers to entry.

Cyber insurance provider Corvus said the number of active ransomware gangs registered a “significant” 34% increase between Q1 and Q4 2023, growing from 35 to 47 either due to fracturing and rebranding or other actors getting hold of leaked encryptors. Twenty-five new ransomware groups emerged in 2023.

“The frequency of rebranding, especially among actors behind the biggest and most notorious strains, is an important reminder that the ransomware ecosystem is smaller than the large number of strains would make it appear,” Chainalysis said.

Besides a notable shift to big game hunting, which refers to the tactic of targeting very large companies to extract hefty ransoms, ransom payments are being steadily routed through cross-chain bridges, instant exchangers, and gambling services, indicating that e-crime groups are slowly moving away from centralized exchanges and mixers in pursuit of new avenues for money laundering.

In November 2023, the U.S. Treasury Department imposed sanctions against Sinbad, a virtual currency mixer that has been put to use by the North Korea-linked Lazarus Group to launder ill-gotten proceeds. Some of the other sanctioned mixers include Blender, Tornado Cash, and ChipMixer.

The pivot to big game hunting is also a consequence of companies increasingly refusing to settle, as the number of victims who chose to pay dropped to a new low of 29% in the last quarter of 2023, according to data from Coveware.

“Another factor contributing to higher ransomware numbers in 2023 was a major shift in threat actors’ use of vulnerabilities,” Corvus said, highlighting Cl0p’s exploitation of flaws in Fortra GoAnywhere and Progress MOVEit Transfer.

“If malware, like infostealers, provide a steady drip of new ransomware victims, then a major vulnerability is like turning on a faucet. With some vulnerabilities, relatively easy access to thousands of victims can materialize seemingly overnight.”

Cybersecurity company Recorded Future revealed that ransomware groups’ weaponization of security vulnerabilities falls into two clear categories: vulnerabilities that have only been exploited by one or two groups and those that have been widely exploited by multiple threat actors.

“Magniber has uniquely focused on Microsoft vulnerabilities, with half of its unique exploits focusing on Windows Smart Screen,” it noted. “Cl0p has uniquely and infamously focused on file transfer software from Accellion, SolarWinds, and MOVEit. ALPHV has uniquely focused on data backup software from Veritas and Veeam. REvil has uniquely focused on server software from Oracle, Atlassian, and Kaseya.”

The continuous adaptation observed among cybercrime crews is also evidenced in the uptick in DarkGate and PikaBot infections following the takedown of the QakBot malware network, which has been the preferred initial entry pathway into target networks for ransomware deployment.

“Ransomware groups such as Cl0p have used zero-day exploits against newly discovered critical vulnerabilities, which represent a complex challenge for potential victims,” Unit 42 said.

“While ransomware leak site data can provide valuable insight on the threat landscape, this data might not accurately reflect the full impact of a vulnerability. Organizations must not only be vigilant about known vulnerabilities, but they must also develop strategies to quickly respond to and mitigate the impact of zero-day exploits.”