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2022-07-07 08:14:35 | North Korean State-Sponsored Threat Actors Deploying "MAUI" Ransomware (lien direct) | Today, the United States Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Agency (CISA) and the Department of Treasury released a joint Cybersecurity Advisory on Maui Ransomware, which is attributed to state sponsored activity by the government of North Korea. The Joint CSA provides detailed insight on the various TTPs used by the threat actors behind Maui, which has targeted the Health and Public Health Sector.How Serious of an Issue is This?High. As ransomware activity causes downtime, theft of confidential and personally identifiable information (PII) and other significant impact to operations, it is important to ensure that various security measures are in place, like being up to date with patching vulnerable machines/infrastructure. Also, ensuring employees are trained and up to date on various social engineering attempts and tactics used by threat actors will be a first line of defense against such attacks.What is Maui Ransomware?Maui ransomware is unique in a way that it requires manual execution to start the encryption routine. Maui also features a CLI (command line interface) that is used by the threat actor to target specific files to encrypt. Maui also has the ability to identify previously encrypted files due to customer headers containing the original path of the file.Who are HIDDEN COBRA/LAZARUS/APT38/BeagleBoyz?HIDDEN COBRA also known as Lazarus/APT38/BeagleBoyz has been atributed to the government of North Korea. Also, they have been linked to multiple high-profile, financially-motivated attacks in various parts of the world - some of which have caused massive infrastructure disruptions. Notable attacks include the 2014 attack on a major entertainment company and a 2016 Bangladeshi financial institution heist that almost netted nearly $1 Billion (USD) for the attackers. Had it not been for a misspelling in an instruction that caused a bank to flag and block thirty transactions, HIDDEN COBRA would have pulled off a heist unlike any other. Although HIDDEN COBRA failed in their attempt, they were still able to net around 81 million dollars in total.The most recent notable attack attributed to HIDDEN COBRA was the Wannacry Ransomware attack, which resulted in massive disruption and damage worldwide to numerous organizations, especially those in manufacturing. Various estimates of the impact were in the hundreds of millions of dollars, with some estimates claiming billions. Other verticals which this group has targeted include critical infrastructures, entertainment, finance, healthcare, and telecommunication sectors across multiple countries.Who are the BeagleBoyz?The BeagleBoyz group is a newly identified group that is a subset of activity by the threat actors known as HIDDEN COBRA/LAZARUS/APT 38 and has been observed committing financial crimes, specifically cryptocurrency related thefts. Further information about the BeagleBoyz can be found here.What Operating Systems are Affected?Windows based operating systems are affected.What is the Status of Coverage?Fortinet customers running the latest definitions are protected against Maui with the following (AV) signatures:W32/Ransom_Win32_MAUICRYPT.YACC5W32/Agent.C5C2!trW32/PossibleThreatAnything Else to Note?Victims of ransomware are cautioned against paying ransoms by such organizations as CISA, NCSC, the FBI, and HHS. Payment does not guarantee files will be recovered. It may also embolden adversaries to target additional organizations, encourage other criminal actors to engage in the distribution of ransomware, and/or fund illicit activities which could potentially be illegal according to a U.S. Department of Treasury's Office of Foreign Assets Control (OFAC) advisory. | Ransomware Threat Patching Medical | Wannacry Wannacry APT 38 | |
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2022-02-27 22:30:37 | Previously Unseen Backdoor Bvp47 Potentially Victimized Global Targets (lien direct) | FortiGuard Labs is aware of a report by Pangu Lab that a new Linux backdoor malware that reportedly belongs to the Equation group was used to potentially compromise more than 200 organizations across over 40 countries around the globe. The Equation group is regarded as one of the most highly skilled threat actors, which some speculate have close connections with National Security Agency (NSA). The threat actor is also reported have been tied to the Stuxnet malware that was used in 2010 cyber attack on a nuclear centrifuge facility in Iran.Why is this Significant?Bvp47 is a previously undiscovered backdoor malware that was reportedly used in cyber attacks carried out by the Equation group. According to the report and information available in the documents that presumably leaked from the Equation group, over 200 organizations spread across more than 40 countries may have been infected with the Bvp47 malware.The Bvp47 file called out in the report was first submitted to VirusTotal in late 2013, which indicates that Bvp47 was used and undiscovered for close to a decade.How was the Connection between the Bvp47 malware and the Equation Group Established?Pangu Lab concluded that Bvp47 belongs to the Equation group because one of the folders included in the documents leaked by the Shadow Brokers in 2017 contained a RSA private key required by Bvp47 for its command execution and other operations.What is the Shadow Brokers?The Shadow Brokers is a threat actor who claimed to have stolen highly classified information from the Equation group in 2016. The stolen information includes zero-day exploits, operation manuals and description of tools used by the Equation group. The Shadow Brokers then attempted to sell the information to the highest bidder. After no one purchased the information, The threat actor released the information to the public after the auction attempt failed.One of the most famous exploits included in the leaked documents is EternalBlue. Within a few weeks of the leak, EternalBlue was incorporated in Wannacry ransomware which caused global panic in 2017.What are the Characteristics of Bvp47?Bvp is a Linux backdoor that performs actions upon receiving commands from Command and Control (C2) servers.Because the Bvp47 framework is incorporated with components such as "dewdrops" and "solutionchar_agents" that are included in the Shadow Brokers leaks, the backdoor is for mainstream Linux distributions, FreeBSD, Solaris as well as JunOS,.Bvp47 also runs various environment checks. If the requirements are not met, the malware deletes itself.What is the Status of Coverage?FortiGuard Labs provide the following AV coverage against Bvp47:ELF/Agent.16DC!tr | Ransomware Malware Threat | Wannacry Wannacry |
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