Suspicious CasPol Execution Spawned by PowerShell for Injection

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1218.009Regsvcs/Regasm
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the .NET CasPol.exe utility being launched by PowerShell, a system binary proxy execution chain used by the XWorm LATAM campaign to hollow CasPol and host the RAT payload. CasPol is seldom executed interactively, and a PowerShell parent is highly suspicious.

Reporting behind it

Related detections7 linkedT1218.009 — drag to rearrange

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RegAsm.exe Process Execution Missing Command-Line and Assembly Path (Windows)

Windows RegAsm.exe Initiates Network Connection to Public IP

Windows Suspicious Execution of Regasm/Regsvcs With Uncommon Command-Line Extension

Windows Process Execution of Regasm/Regsvcs from Uncommon Directories

Suspicious CasPol Execution Spawned by PowerShell for Injection

Pivot detection · T1218.009 · 7 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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