StealBit

MITRE ATT&CK: S1200 View on attack.mitre.org

Aliases: Corrempa, StealBit

First seen
2021-05-01 00:00:00
Malware type
ransomware
Family
Malware family
Operating systems
windows
Related IoCs
1 (1 malicious)
Last IoC activity
2026-07-21 20:29:29
Profile updated
2026-07-07 13:46:45

Targeted industries: financial-services healthcare-and-pharmaceutical government-and-public-sector technology-and-telecommunications manufacturing

Context

StealBit is a data exfiltration tool that is developed and maintained by the operators of the the LockBit Ransomware-as-a-Service (RaaS) and offered to affiliates to exfiltrate data from compromised systems for double extortion purposes.

Recent IoC activity

1 malicious indicator in Maltiverse are attributed to StealBit (S1200). The 1 most recently updated:

TypeIndicatorUpdatedSources
file sample 968875370dbc26a6439860f854c91f9ee675e588f8dbf78e6cb7e20b6d957bec.bin 2026-07-21 1

Detection coverage

  • 2 YARA rules
  • 297 Sigma rules

Malware & tools used

  • Debugger Evasion (attack-pattern)
  • Inter-Process Communication (attack-pattern)
  • File Deletion (attack-pattern)
  • Data Transfer Size Limits (attack-pattern)
  • Encrypted/Encoded File (attack-pattern)
  • Native API (attack-pattern)
  • System Information Discovery (attack-pattern)
  • Execution Guardrails (attack-pattern)
  • Data from Local System (attack-pattern)
  • System Language Discovery (attack-pattern)
  • Non-Application Layer Protocol (attack-pattern)
  • Disable or Modify Tools (attack-pattern)
  • Web Protocols (attack-pattern)
  • Deobfuscate/Decode Files or Information (attack-pattern)
  • File and Directory Discovery (attack-pattern)

Detection rules

  • R3C0NST_Stealbit (yara-rule)
  • MALPEDIA_Win_Stealbit_Auto (yara-rule)

Reports & references

  • Kaspersky — 106457 (report)
  • cybereason.com — Threat Analysis Report Inside The Lockbit Arsenal The Stealbit Exfiltration Tool (report)
  • yoroi.company — Hunting The Lockbit Gangs Exfiltration Infrastructures (report)
  • accenture.com — Stealbit Exmatter Exfiltration Tool Analysis (report)
  • malpedia.caad.fkie.fraunhofer.de — Win.Stealbit (report)
  • twitter.com — 1425875923606310913 (report)
  • ic3.gov — 220204 (report)
  • MITRE ATT&CK — S1200 (report)
  • cybereason.com — Threat Analysis Report Inside The Lockbit Arsenal The Stealbit Exfiltration Tool (report)

External references