Suspicious Start-Process PassThru (via ps_script)

title: Suspicious Start-Process PassThru (via ps_script)
id: 68cf90f6-a208-5676-8ddd-418a1d435b2f
status: stable
description: This rule detects powershell use PassThru option to start in background
references:
    - https://attack.mitre.org/techniques/T1036/003/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1036.003/T1036.003.md
    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-process?view=powershell-7.6
author: Huntrule Team
date: 2026-02-24
tags:
    - attack.stealth
    - attack.t1036.003
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection_cmdlet:
        ScriptBlockText|contains:
            - 'Start-Process '
            - 'saps '
    selection_param:
        ScriptBlockText|contains|all:
            - '-PassThru '
            - '-FilePath '
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium