Suspicious tar Extraction of Staged Archive to Temp (via process_creation)

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1059Command and Scripting Interpreter
Persistence
Priv Esc
Defense Evasion
- T1140Deobfuscate/Decode Files or Information
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the Windows tar utility extracting archive files with an unusual .ta extension. UNC6384 delivered PlugX by extracting rjnlzlkfe.ta and krnqdyvmlb.ta archives with tar into the Temp directory before executing the sideloaded Canon binary.

Reporting behind it

Related detections9 linkedT1140 — drag to rearrange

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Suspicious tar Extraction of Staged Archive to Temp (via process_creation)

Pivot detection · T1140 · 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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