Possible Akira Ransomware Note or Encrypted Extension Creation

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 creation of files with the akiranew extension or the akiranew.txt ransom note produced by the Akira Rust ransomware variant. Both artifacts appear only after files have been encrypted on the host. Detecting them confirms an active Akira encryption event for rapid isolation.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

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Malicious The Gentlemen Ransomware Encryptor via Distinctive CLI Flags

Malicious GigaWiper Ransomware File Extension .candy

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)

Possible Akira Ransomware Note or Encrypted Extension Creation

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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