Suspicious Data Staging via WinRAR Recursive Archive with Silent Update Flags (via process_creation)

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 archiving directories with the silent recursive flag set used by ransomware crews for collection, matching the exact flag combination in this multi-gang intrusion that packaged file-share directories before exfiltration. Adversaries stage stolen data into RAR archives with these quiet update flags ahead of upload, so this command pattern targeting share paths is a strong pre-exfiltration collection indicator.

Reporting behind it

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Suspicious Data Staging via WinRAR Recursive Archive with Silent Update Flags (via process_creation)

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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