Rewterz Threat Alert – Remcos RAT – Active IOCs

Severity

High

Analysis Summary

Remcos Remote Control and Surveillance, marketed as a legitimate software by a Germany-based firm Breaking Security for remotely managing Windows systems is now widely used in multiple malicious campaigns by threat actors. Remcos RAT is a sophisticated remote access Trojan (RAT) that can be used to fully control and monitor any Windows computer from XP and onwards. The current campaign utilizes social engineering techniques wherein threat actors are leveraging what’s new and trending worldwide. The phishing email contains a PDF offering CoronaVirus safety measures but in reality, this PDF includes an executable for a REMCOS RAT dropper that runs together with a VBS file executing the malware. The malware also adds the Startup registry key at “HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce” for it to become persistent while the device affected has been restarted.
This Backdoor gathers the following information and sends it to its servers:

• Computer 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),

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

MD5

• 710ff8dd9375beacf7c9dff03f6e90b1
• c6855b8e550bcdd88084643f747070ac
• 7450bd6d921c7bf48975f800312f5eb3

SHA-256

• 68f59f9ceb6a93c4ce1cb450202bd0dd021543c5bf60d82f36c86252a5bd69e8
• 34400bb7662a1aa0865f6ec06892fff142dd3ff8d09464141f75a96a42724493
• 551b886b528af4929cc7daf4cf5f606924619014c7a2fd447d0e4cfc71dcd729

SHA-1

• 97b88df636884ea96e1e02dda4136c1a0bba2b3e
• 63cea165c1d9fcfcfa2fe8e6da5a185193e31c08
• ef8a6e6d2aff2e04110929f95e6b6b7ceff9cd37

Remediation

• Block all threat indicators at their respective controls.
• Search for IOCs in your environment.