Rewterz Threat Alert – Quasar RAT – Active IOCs
August 31, 2021Rewterz Threat Advisory –RealTek CVE-2021-35394 Exploited in the Wild
August 31, 2021Rewterz Threat Alert – Quasar RAT – Active IOCs
August 31, 2021Rewterz Threat Advisory –RealTek CVE-2021-35394 Exploited in the Wild
August 31, 2021Severity
Medium
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
- b6e802fb472a724ac8715a8e11147703
- 048efe703818c8acd8e950dc1be7d4d2
- 0f7f5b5cec70b72c05fbe913f6159401
- 5beb508b242696bcebbbee8818e4ed9d
- 8267d5d2226c81c92af18a02f0f2af74
- d80188f36c0be5335622ab0a92b0e4c5
- 296a3754ffc79c4c03bd1ae4529dfbe1
SHA-256
- f057b792468764bc329ada36f4fe628da86aa8bd927e2475e9cf322917a48423
- 24e0e46e6906df66d853db318e04243962f2abbf4fef8fd62582e5a3b75201a6
- fcc162c06cebef3b1ea5c21973c4e8009a48925b30d88545f103bdac53a80e23
- d3ce772b44506904d48a303ad8a6bcb319070ebf63b3bfb44dc1a2f34398963e
- 27237c634430867f474aa7936cfed730c68815a889a137e1bf61033f9ffc6e1f
- 31825b4e2cb4053a257359fa54e809be5a3d6b991ab3f4eddb0daf87def9f7eb
- a279bf0c821050865547626692cb2413c613315721d279529c5c30174e94cfec
SHA1
- 2f3fd135c501e19ead305ab3e4fe6a530af8ebc8
- e1728229d0dbf464a844323f6137f8fe0abdefe8
- 2df6ebe2e99598c8456256ad46118ee4d8f3d4d5
- 2d4580071df4452e362449b6c66adaf2e87eaee4
- fd50eb69c9c0195cbbe3f30c2d18c6bba0296666
- c3e390d20a7ff8e1e9402199f2a1f7a2328d0b76
- c17e843ac26620e4611d803a3480c20c0a499d05
Remediation
- Block all threat indicators at their respective controls.
- Search for IOCs in your environment.