GoBear

MITRE ATT&CK: S1197 View on attack.mitre.org

Aliases: GoBear

Malware type
backdoor
Family
Malware family
Operating systems
windows
Profile updated
2026-07-07 13:22:08

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

Targeted regions: country_code:kr

Context

GoBear is a Go-based backdoor that abuses legitimate, stolen certificates for defense evasion purposes. GoBear is exclusively linked to Kimsuky operations.

Detection coverage

  • 1 YARA rules
  • 36 Sigma rules

Malware & tools used

  • Proxy (attack-pattern)
  • Match Legitimate Resource Name or Location (attack-pattern)
  • Code Signing (attack-pattern)

Used by threat actors

Detection rules

  • SEKOIA_Backoor_Win_Gobear (yara-rule)

Reports & references

  • security.com — Springtail Kimsuky Backdoor Espionage (report)
  • medium.com — Kimsuky Disguised As A Korean Company Signed With A Valid Certificate To Distribute Troll Stealer Cfa5D54314E2 (report)
  • MITRE ATT&CK — S1197 (report)

External references