OutSteel

MITRE ATT&CK: S1017 View on attack.mitre.org

Aliases: OutSteel

First seen
2021-03-01 00:00:00
Malware type
downloader, loader
Family
Malware family
Operating systems
windows
Profile updated
2026-07-07 13:18:32

Targeted industries: government-and-public-sector financial-services

Context

OutSteel is a file uploader and document stealer developed with the scripting language AutoIT that has been used by Saint Bear since at least March 2021.

Detection coverage

  • 266 Sigma rules

Malware & tools used

  • Windows Command Shell (attack-pattern)
  • Exfiltration Over C2 Channel (attack-pattern)
  • Spearphishing Link (attack-pattern)
  • Malicious Link (attack-pattern)
  • Data from Local System (attack-pattern)
  • Automated Exfiltration (attack-pattern)
  • AutoHotKey & AutoIT (attack-pattern)
  • File and Directory Discovery (attack-pattern)
  • Automated Collection (attack-pattern)
  • Malicious File (attack-pattern)
  • Spearphishing Attachment (attack-pattern)
  • File Deletion (attack-pattern)
  • Lateral Tool Transfer (attack-pattern)
  • Web Protocols (attack-pattern)
  • Ingress Tool Transfer (attack-pattern)
  • Process Discovery (attack-pattern)
  • Match Legitimate Resource Name or Location (attack-pattern)

Used by threat actors

Reports & references

  • Palo Alto Unit 42 — Ukraine Targeted Outsteel Saintbot (report)
  • malpedia.caad.fkie.fraunhofer.de — Win.Outsteel (report)
  • telsy.com — 6372 (report)
  • MITRE ATT&CK — S1017 (report)

External references