Suspicious WinRAR Silent Archive Staging

ATT&CK techniques

Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
- T1560.001Archive via Utility
C2
Exfiltration
Impact

What it detects

This rule detects WinRAR invoked with the specific silent recursion and monitoring flag combination used to stage data for exfiltration. This behavior matches Akira operators who archive victim files quietly prior to theft. This distinctive flag set is uncommon in normal usage and indicates automated collection of files before ransomware exfiltration.

Reporting behind it

Related detections9 linkedT1560.001 — drag to rearrange

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Suspicious Data Staging via Everything and 7-Zip Prior to Exfiltration via process_creation

Suspicious WinRAR Silent Archive Staging

Pivot detection · T1560.001 · 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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