BlackCat | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have shed light on what has been described as the first Unified Extensible Firmware Interface (UEFI) bootkit designed for Linux systems. Dubbed Bootkitty by its creators who go by the name BlackCat, the bootkit is assessed to be a proof-of-concept (PoC) and there is no evidence that it has been put to use in real-world attacks. Also tracked as IranuKit , it was uploaded to the VirusTotal platform on November 5, 2024. "The bootkit's main goal is to disable the kernel's signature verification feature and to preload two as yet unknown ELF binaries via the Linux init process (which is the first process executed by the Linux kernel during system startup)," ESET researchers Martin Smolár and Peter Strýček said . The development is significant as it heralds a shift in the cyber threat landscape where UEFI bootkits are no longer confined to Windows systems alone . It's worth noting that Bootkitty is signed by a self-signed certificate, a...

The U.S. government is warning about the resurgence of BlackCat (aka ALPHV) ransomware attacks targeting the healthcare sector as recently as this month. "Since mid-December 2023, of the nearly 70 leaked victims, the healthcare sector has been the most commonly victimized," the government  said  in an updated advisory. "This is likely in response to the ALPHV/BlackCat administrator's post encouraging its affiliates to target hospitals after operational action against the group and its infrastructure in early December 2023." The alert comes courtesy of the Federal Bureau of Investigation (FBI), the Cybersecurity and Infrastructure Security Agency (CISA), and the Department of Health and Human Services (HHS). The BlackCat ransomware operation suffered a major blow late last year after a coordinated law enforcement operation led to the  seizure of its dark leak sites . But the takedown turned out to be a failure after the group managed to regain control of the...

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The banking malware known as  Carbanak  has been observed being used in  ransomware attacks  with updated tactics. "The malware has adapted to incorporate attack vendors and techniques to diversify its effectiveness," cybersecurity firm NCC Group  said  in an analysis of ransomware attacks that took place in November 2023. "Carbanak returned last month through new distribution chains and has been distributed through compromised websites to impersonate various business-related software." Some of the impersonated tools include popular business-related software such as HubSpot, Veeam, and Xero. Carbanak , detected in the wild since at least 2014, is known for its data exfiltration and remote control features. Starting off as a banking malware, it has been put to use by the  FIN7 cybercrime syndicate . In the latest attack chain documented by NCC Group, the compromised websites are designed to host malicious installer files masquerading as legitimat...

The threat actors behind the  8Base ransomware  are leveraging a variant of the Phobos ransomware to conduct their financially motivated attacks. The findings come from Cisco Talos, which has recorded an increase in activity carried out by the cybercriminals. "Most of the group's Phobos variants are distributed by SmokeLoader, a backdoor trojan," security researcher Guilherme Venere said in an exhaustive  two-part   analysis  published Friday. "This commodity loader typically drops or downloads additional payloads when deployed. In 8Base campaigns, however, it has the ransomware component embedded in its encrypted payloads, which is then decrypted and loaded into the SmokeLoader process' memory." 8Base came into sharp focus in mid-2023, when a similar spike in activity was observed by the cybersecurity community. It's said to be active at least since March 2022. A  previous analysis  from VMware Carbon Black in June 2023 identified parallels betw...

U.S. cybersecurity and intelligence agencies have released a joint advisory about a cybercriminal group known as  Scattered Spider  that's known to employ sophisticated phishing tactics to infiltrate targets. "Scattered Spider threat actors typically engage in data theft for extortion using multiple social engineering techniques and have recently leveraged BlackCat/ALPHV ransomware alongside their usual TTPs," the agencies  said . The threat actor, also tracked under the monikers Muddled Libra, Octo Tempest, 0ktapus, Scatter Swine, Star Fraud, and UNC3944, was the subject of an  extensive profile  from Microsoft last month, with the tech giant calling it "one of the most dangerous financial criminal groups." Considered as experts in social engineering, Scattered Spider is known to rely on phishing, prompt bombing, and SIM swapping attacks to obtain credentials, install remote access tools, and bypass multi-factor authentication (MFA). Scattered Spider, li...

Microsoft on Thursday disclosed that it found a new version of the  BlackCat  ransomware (aka ALPHV and Noberus) that embeds tools like Impacket and RemCom to facilitate lateral movement and remote code execution. "The  Impacket tool  has credential dumping and remote service execution modules that could be used for broad deployment of the BlackCat ransomware in target environments," the company's threat intelligence team  said  in a series of posts on X (formerly Twitter). "This BlackCat version also has the  RemCom hacktool  embedded in the executable for remote code execution. The file also contains hardcoded compromised target credentials that actors use for lateral movement and further ransomware deployment." RemCom, billed as an open-source alternative to PsExec, has been put to use by Chinese and Iranian nation-state threat actors like  Dalbit  and  Chafer  (aka Remix Kitten) to move across the victim environments in...

The financially motivated threat actor known as FIN8 has been observed using a "revamped" version of a backdoor called  Sardonic  to deliver the  BlackCat ransomware . According to the Symantec Threat Hunter Team, part of Broadcom, the development is an attempt on the part of the e-crime group to diversify its focus and maximize profits from infected entities. The intrusion attempt took place in December 2022. FIN8 is being tracked by the cybersecurity company under the name Syssphinx. Known to be active since at least 2016, the adversary was originally attributed to attacks targeting point-of-sale (PoS) systems using malware such as PUNCHTRACK and BADHATCH. The group resurfaced after more than a year in March 2021 with an updated version of BADHATCH, following it up with a completely new bespoke implant called Sardonic , which was disclosed by Bitdefender in August 2021. "The C++-based Sardonic backdoor has the ability to harvest system information and execute c...

Threat actors associated with the  BlackCat ransomware  have been observed employing malvertising tricks to distribute rogue installers of the WinSCP file transfer application. "Malicious actors used malvertising to distribute a piece of malware via cloned webpages of legitimate organizations," Trend Micro researchers  said  in an analysis published last week. "In this case, the distribution involved a webpage of the well-known application WinSCP, an open-source Windows application for file transfer." Malvertising   refers  to the use of  SEO poisoning techniques  to spread malware via online advertising. It typically involves hijacking a chosen set of keywords (e.g., "WinSCP Download") to display bogus ads on Bing and Google search results pages with the goal of redirecting unsuspecting users to sketchy pages. The idea is to trick users searching for applications like WinSCP into downloading malware, in this instance, a backdoor that contains...

The  BlackCat ransomware crew  has been spotted fine-tuning their malware arsenal to fly under the radar and expand their reach. "Among some of the more notable developments has been the use of a new version of the Exmatter data exfiltration tool, and the use of Eamfo, information-stealing malware that is designed to steal credentials stored by Veeam backup software," researchers from Symantec  said  in a new report. BlackCat, also known by the names ALPHV and Noberus, is attributed to an adversary tracked as Coreid (aka  FIN7 , Carbanak, or Carbon Spider) and is said to be a  rebranded successor  of  DarkSide  and  BlackMatter , both of which shut shop last year following a string of high-profile attacks, including that of Colonial Pipeline. The threat actor, like other notorious ransomware groups, is known to run a ransomware-as-a-service (RaaS) operation, which involves its core developers enlisting the help of affiliates to carr...

The Emotet malware is now being leveraged by ransomware-as-a-service (RaaS) groups, including Quantum and BlackCat, after  Conti's official retirement  from the threat landscape this year. Emotet  started off as a banking trojan in 2014, but updates added to it over time have transformed the malware into a highly potent threat that's capable of downloading other payloads onto the victim's machine, which would allow the attacker to control it remotely. Although the infrastructure associated with the invasive malware loader was taken down as part of a law enforcement effort in January 2021, the Conti ransomware cartel is said to have  played an instrumental role  in its comeback late last year. "From November 2021 to Conti's dissolution in June 2022, Emotet was an exclusive Conti ransomware tool, however, the Emotet infection chain is currently attributed to Quantum and BlackCat," AdvIntel  said  in an advisory published last week. Typical attack s...

Microsoft is warning that the BlackCat ransomware crew is leveraging exploits for  unpatched Exchange server  vulnerabilities to gain access to targeted networks. Upon gaining an entry point, the attackers swiftly moved to gather information about the compromised machines, followed by carrying out credential theft and lateral movement activities, before harvesting intellectual property and dropping the ransomware payload. The entire sequence of events played out over the course of two full weeks, the Microsoft 365 Defender Threat Intelligence Team  said  in a report published this week. "In another incident we observed, we found that a ransomware affiliate gained initial access to the environment via an internet-facing Remote Desktop server using compromised credentials to sign in," the researchers said, pointing out how "no two BlackCat 'lives' or deployments might look the same." BlackCat , also known by the names ALPHV and Noberus, is a relatively n...

The U.S. Federal Bureau of Investigation (FBI) is sounding the alarm on the BlackCat ransomware-as-a-service (RaaS), which it said victimized at least 60 entities worldwide between as of March 2022 since its emergence last November. Also called ALPHV and  Noberus , the malware is notable for being the first-ever ransomware written in the Rust programming language, which is known to be memory safe and offer improved performance. "Many of the developers and money launderers for BlackCat/ALPHV are linked to  DarkSide / BlackMatter , indicating they have extensive networks and experience with ransomware operations," the FBI said in an  advisory  published last week. The disclosure comes weeks after twin reports from  Cisco Talos  and  Kasperksy  uncovered links between BlackCat and BlackMatter ransomware families, including the use of a modified version of a data exfiltration tool dubbed Fendr that's been previously only observed in BlackMatter-r...

Cybersecurity researchers have uncovered further links between BlackCat (aka ALPHV) and BlackMatter ransomware families, the former of which emerged as a replacement following international scrutiny last year. "At least some members of the new  BlackCat  group have links to the BlackMatter group, because they modified and reused a custom exfiltration tool [...] and which has only been observed in BlackMatter activity," Kaspersky researchers  said  in a new analysis. The tool, dubbed Fendr, has not only been upgraded to include more file types but also used by the gang extensively to steal data from corporate networks in December 2021 and January 2022 prior to encryption, in a popular tactic called double extortion. The findings come less than a month after Cisco Talos researchers  identified  overlaps in the tactics, techniques, and procedures (TTPs) between BlackCat and BlackMatter, describing the new ransomware variant as a case of "vertica...

An analysis of two ransomware attacks has  identified overlaps  in the tactics, techniques, and procedures (TTPs) between BlackCat and BlackMatter, indicating a strong connection between the two groups. While it's typical of ransomware groups to rebrand their operations in response to increased visibility into their attacks,  BlackCat  (aka Alphv) marks a new frontier in that the cyber crime cartel is built out of affiliates of other ransomware-as-a-service (RaaS) operations. BlackCat first emerged in November 2021 and has since targeted several organizations worldwide over the past few months. It has been called out for being similar to  BlackMatter , a short-lived ransomware family that originated from  DarkSide , which, in turn, attracted notoriety for its high-profile attack on  Colonial Pipeline  in May 2021. In an interview with Recorded Future's The Record last month, a BlackCat representative dismissed speculations that it's a rebrand...