Sigma rule: Potential Process Execution Proxy Via CL_Invocation.ps1

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-523b007554f8, updated 2023-08-17T00:00:00.000Z.

Rule

Title
Potential Process Execution Proxy Via CL_Invocation.ps1
Status
test
Level
medium
Author
Nasreddine Bencherchali (Nextron Systems), oscd.community, Natalia Shornikova
Date
2020-10-14
Modified
2023-08-17
File
rules/windows/process_creation/proc_creation_win_powershell_cl_invocation.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product
windows
category
process_creation

Detection

selection:
    # Note: As this function is usually called from within powershell, classical process creation even would not catch it. This will only catch inline calls via "-Command" or "-ScriptBlock" flags for example.
    CommandLine|contains: 'SyncInvoke '
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1216

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_powershell_cl_invocation.yml

Sources and licences

  • SigmaHQ

    "Potential Process Execution Proxy Via CL_Invocation.ps1" by Nasreddine Bencherchali (Nextron Systems), oscd.community, Natalia Shornikova (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_powershell_cl_invocation.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential Process Execution Proxy Via CL_Invocation.ps1",
entity page, dataset version ref-523b007554f8, updated 2023-08-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/a0459f02-ac51-4c09-b511-b8c9203fc429 (accessed 2026-11-03).
Underlying source: SigmaHQ rule a0459f02-ac51-4c09-b511-b8c9203fc429, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.