Suspicious Execution From WinRAR Temporary Extraction Path via Command Line (via process_creation)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1203Exploitation for Client Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects process execution referencing the WinRAR temporary extraction directory pattern Rar$ under the local Temp folder, which the CVE-2023-38831 exploit uses to run its planted payload. It is associated with attacks abusing the WinRAR archive spoofing zero-day reported by Uptycs. Because scripts and binaries executed straight from this transient extraction path are characteristic of the exploit, this pattern indicates likely code execution from a crafted archive.

Reporting behind it

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Suspicious Execution From WinRAR Temporary Extraction Path via Command Line (via process_creation)

Pivot detection · T1203 · 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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