Suspicious Powershell WMI Persistence (via ps_script)

title: Suspicious Powershell WMI Persistence (via ps_script)
id: cab9284e-c07a-532c-936b-88fbcc5b6890
status: stable
description: This rule detects threat actors may establish persistence and elevate privileges by running hostile content triggered by a Windows Management Instrumentation (WMI) event subscription.
references:
    - https://attack.mitre.org/techniques/T1546/003/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.003/T1546.003.md
    - https://github.com/EmpireProject/Empire/blob/08cbd274bef78243d7a8ed6443b8364acd1fc48b/data/module_source/persistence/Persistence.psm1#L545
author: Huntrule Team
date: 2026-06-12
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1546.003
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection_ioc:
        - ScriptBlockText|contains|all:
              - 'New-CimInstance '
              - '-Namespace root/subscription '
              - '-ClassName __EventFilter '
              - '-Property '
        - ScriptBlockText|contains|all:
              - 'New-CimInstance '
              - '-Namespace root/subscription '
              - '-ClassName CommandLineEventConsumer '
              - '-Property '
    condition: selection_ioc
falsepositives:
    - Unknown
level: medium