RCSession

MITRE ATT&CK: S0662 View on attack.mitre.org

Aliases: RCSession

First seen
2018-01-01 00:00:00
Malware type
backdoor, rat
Family
Malware family
Operating systems
windows
Profile updated
2026-07-07 12:39:18

Targeted industries: government-and-public-sector education-and-nonprofits

Targeted regions: country_code:cn country_code:hk country_code:in country_code:vn

Context

RCSession is a backdoor written in C++ that has been in use since at least 2018 by Mustang Panda and by Threat Group-3390 (Type II Backdoor).

Detection coverage

  • 1 YARA rules
  • 546 Sigma rules

Malware & tools used

  • Encrypted Channel (attack-pattern)
  • Process Hollowing (attack-pattern)
  • Process Discovery (attack-pattern)
  • Msiexec (attack-pattern)
  • Screen Capture (attack-pattern)
  • Keylogging (attack-pattern)
  • Ingress Tool Transfer (attack-pattern)
  • Native API (attack-pattern)
  • Web Protocols (attack-pattern)
  • System Owner/User Discovery (attack-pattern)
  • File Deletion (attack-pattern)
  • Registry Run Keys / Startup Folder (attack-pattern)
  • Compression (attack-pattern)
  • Data from Local System (attack-pattern)
  • Non-Application Layer Protocol (attack-pattern)
  • System Information Discovery (attack-pattern)
  • Fileless Storage (attack-pattern)
  • Masquerading (attack-pattern)
  • Modify Registry (attack-pattern)
  • DLL (attack-pattern)
  • Windows Command Shell (attack-pattern)
  • Bypass User Account Control (attack-pattern)

Used by threat actors

Detection rules

  • CAPE_Rcsession (yara-rule)

Reports & references

  • Trend Micro — Iron Tiger Apt Updates Toolkit With Evolved Sysupdate Malware Va (report)
  • Trend Micro — Wp Uncovering Drbcontrol (report)
  • secureworks.com — Bronze President Targets Ngos (report)
  • MITRE ATT&CK — S0662 (report)

External references