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
- Related IoCs
- 2 (2 malicious)
- Last IoC activity
- 2026-10-15 05:03:31
- 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.
Recent IoC activity
2 malicious indicators in Maltiverse are attributed to OutSteel (S1017). The 2 most recently updated:
| Type | Indicator | Updated | Sources |
|---|---|---|---|
| file sample | 999707599db51fc274a5caa26c04799211b52f5ef729afc8a253579a1188af19 | 2026-10-15 | 1 |
| file sample | 2026-09-21_b31aeb434534a71fd2a80ce673fb8895_agent-tesla_amadey_darkgate_elex_... | 2026-09-22 | 1 |
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
- Saint Bear (threat-actor)
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)