Samurai

MITRE ATT&CK: S1099 View on attack.mitre.org

Aliases: Samurai

First seen
2020-01-01 00:00:00
Malware type
backdoor, rat
Family
Malware family
Operating systems
windows
Last IoC activity
2026-05-28 00:56:50
Profile updated
2026-07-07 13:01:16

Targeted industries: government-and-public-sector technology-and-telecommunications

Context

Samurai is a passive backdoor that has been used by ToddyCat since at least 2020. Samurai allows arbitrary C# code execution and is used with multiple modules for remote administration and lateral movement.

Detection coverage

  • 436 Sigma rules

Malware & tools used

  • Ingress Tool Transfer (attack-pattern)
  • Non-Application Layer Protocol (attack-pattern)
  • Windows Service (attack-pattern)
  • Symmetric Cryptography (attack-pattern)
  • File and Directory Discovery (attack-pattern)
  • Compression (attack-pattern)
  • Modify Registry (attack-pattern)
  • Compile After Delivery (attack-pattern)
  • Standard Encoding (attack-pattern)
  • Query Registry (attack-pattern)
  • Match Legitimate Resource Name or Location (attack-pattern)
  • Proxy (attack-pattern)
  • Windows Command Shell (attack-pattern)
  • Web Protocols (attack-pattern)
  • Dynamic API Resolution (attack-pattern)
  • Obfuscated Files or Information (attack-pattern)
  • Native API (attack-pattern)
  • Data from Local System (attack-pattern)
  • Software Discovery (attack-pattern)

Used by threat actors

Reports & references

  • Kaspersky — 106799 (report)
  • MITRE ATT&CK — S1099 (report)

External references