Possible Process Execution Proxy Through CL_Invocation.ps1 (via process_creation)

This rule detects calls to "SyncInvoke" that is part of the "CL_Invocation.ps1" script to proxy execution using "System.Diagnostics.Process"

SigmamediumWindowsv1

sigma

possible-process-execution-proxy-through-cl-invocation-ps1-via-process-creation

title: Possible Process Execution Proxy Through CL_Invocation.ps1 (via process_creation)
id: ccb01bba-6d3d-5e8b-a373-4151a4234e12
status: stable
description: This rule detects calls to "SyncInvoke" that is part of the "CL_Invocation.ps1" script to proxy execution using "System.Diagnostics.Process"
references:
    - https://attack.mitre.org/techniques/T1216/
    - https://lolbas-project.github.io/lolbas/Scripts/Cl_invocation/
    - https://twitter.com/bohops/status/948061991012327424
author: Huntrule Team
date: 2026-01-08
tags:
    - attack.stealth
    - attack.t1216
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains: 'SyncInvoke '
    condition: selection
falsepositives:
    - Unknown
level: medium

Known false positives

Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.