DragonForce Ransomware File Association Registration for Encrypted Extension (via registry_set)

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 registration of a DefaultIcon association for the .dragonforce_encrypted file extension, an impact behavior DragonForce ransomware performs so all encrypted files display an attacker-supplied icon dropped under the public profile. Registering an icon for a novel encrypted extension is a strong post-encryption indicator, making detection useful for scoping ransomware impact across a host.

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)

DragonForce Ransomware File Association Registration for Encrypted Extension (via registry_set)

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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