Malicious DeadBolt Ransomware Note and Encrypted File Artifacts

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects the creation of the DeadBolt ransom note or files bearing the .deadbolt extension which mark encrypted data on compromised QNAP network attached storage devices. The note and extension appear as the ransomware finishes encrypting shares. It is important because their presence confirms an active DeadBolt impact event requiring immediate response.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

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Malicious Forced BitLocker Encryption for Extortion (via process_creation)

Malicious Volume Shadow Copy Deletion via Vssadmin

Malicious CACTUS Ransomware Note and Encrypted File Artifacts (via file_event)

Malicious Macaw Ransom Note or Encrypted File Written (via file_event)

Malicious DeadBolt Ransomware Note and Encrypted File Artifacts

Pivot detection · T1486 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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