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October 5, 2022Severity
High
Analysis Summary
Remcos malware has been operating since 2016. This RAT was originally promoted as genuine software for remote control of Microsoft Windows from XP onwards, and is frequently found in phishing attempts due to its capacity to completely infect an afflicted machine. Remcos malware attacks Windows systems and provides the attacker complete control over the machine.It is frequently distributed by malicious documents or archive files that contain scripts or executables. Remcos, like other RATs, offers the threat actor complete access over the infected PCs which allow them to record keystrokes, passwords, and other critical information. Remcos incorporates various obfuscation and anti-debugging techniques to evade detection. Regular updates of its features by its creators make this malware a challenging adversary.
Impact
- Breach of: Victim’s machine information (OS version, computer name, system type, product name, primary adapter).
- User information (user access, user profile, user name, user domain)
- Processor information (processor revision number, processor level, processor identifier, processor architecture)
Indicators of Compromise
Domain Name
- zelthin[.]dvrlists[.]com
MD5
- fd9b4b423afdd16396c9405a40089622
- 4859c09e16543504b1bed0c6c0f44dd4
SHA-256
- eba266f6fe3d8faea13b7866c5e50c4c68de716922c8b0df76b2e8defcc723ca
- a26d870e1e5afce73df367f469d5b95f3ca42a17f4a9809edb3d817cdc3e1ea0
SHA-1
- 6d533d0ddf5f3d2f62f5788bbe08858cae2366aa
- 0f41055c821a518c9964e4e9ce2156821ed74216
URL
- http[:]//server-goeif8[.]cf/duijkomk/Encrypted%20Client%20OG[.]jpg
Remediation
- Block all threat indicators at your respective controls.
- Search for IOCs in your environment.