Suspicious extrac32 CAB Extraction Abuse

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1059.003Windows Command Shell
Persistence
Priv Esc
Defense Evasion
- T1218System Binary Proxy Execution
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the extrac32 LOLBin extracting cabinet contents using the /Y overwrite and /E extract-all switches. In the observed ClickFix chain extrac32 is abused to unpack a staged payload such as Boat.pst. This living-off-the-land extraction step helps adversaries deploy secondary tooling while avoiding dedicated archive utilities.

Reporting behind it

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Suspicious extrac32 CAB Extraction Abuse

Pivot detection · T1059.003 · 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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