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

• 2eb249ad09e594a04e37edc80f9cf3d0
• 5d30226c0d37d52aa8b79c21c65da1bd

SHA-256

• 968dd6eaba745a8e8c545d84b840664cd74bf9e45654c17bcdae0aca14531e79
• 348a4cca3d114bf601910086493b389faf88ac8d00e7a7e04b4e8eb83f6bf9cf

SHA-1

• 72ac41c52032d58499be1c4f0e415fd290d28191
• 50c5b2ed59dc3db6f12883e15aea0a3fd3bf962e

Remediation

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