title: Execution via CL_Invocation.ps1
id: 4cd29327-685a-460e-9dac-c3ab96e549dc
description: Detects Execution via SyncInvoke in CL_Invocation.ps1 module
status: experimental
author: oscd.community, Natalia Shornikova
date: 2020/10/14
references:
    - https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSScripts/Cl_invocation.yml
    - https://twitter.com/bohops/status/948061991012327424
tags:
    - attack.defense_evasion
    - attack.t1216
logsource:
    product: windows
    service: powershell
detection:
    selection:
        EventID: 4104
        ScriptBlockText|contains|all:
          - 'CL_Invocation.ps1'
          - 'SyncInvoke'
    selection2:
        EventID: 4104
        ScriptBlockText|contains:
          - 'CL_Invocation.ps1'
          - 'SyncInvoke'
    timeframe: 1m
    condition: 
        - selection
        - selection2 | count(ScriptBlockText) by Computer > 2
      # PS > Import-Module c:\Windows\diagnostics\system\Audio\CL_Invocation.ps1; SyncInvoke c:\Evil.exe
      # or
      # PS > Import-Module c:\Windows\diagnostics\system\Audio\CL_Invocation.ps1
      # PS > SyncInvoke c:\Evil.exe
falsepositives: Unknown
level: high