ComRAT v4

ComRAT v4, also known as Agent.BTZ, is a harmful remote access trojan (RAT) malware used by the threat group Turla. Developed using C++, ComRAT v4 employs a virtual FAT16 file system, often utilized for exfiltrating sensitive documents. This malware can infiltrate your system via suspicious downloads, emails, or websites, and once inside, it can steal personal information, disrupt operations, or even hold your data hostage for ransom. A variant of this malware, identified by the hash a62e1a866bc248398b6abe48fdb44f482f91d19ccd52d9447cda9bc074617d56, has been submitted by an anonymous source. The ComRAT v4 attacks leverage various MITRE ATT&CK techniques, which are globally-accessible knowledge bases of adversary tactics and techniques based on real-world observations. While the specific techniques used in these attacks were not provided in the question, they typically involve initial access, execution, persistence, privilege escalation, defense evasion, credential access, discovery, lateral movement, collection, exfiltration, and command and control. There is evidence suggesting that the origin of these attacks might be Russian speakers. This is indicated by the use of the term "transport_http" in the Command & Control (C&C) protocol of the GoldenHowl malware, a term typically used by Turla and MoustachedBouncer. The journey from Agent.BTZ to ComRAT v4 spans over ten years, indicating a long-standing operation that has evolved and adapted over time to maintain its effectiveness.