
title: Powershell WMI Persistence
author: frack113
date: 2021/08/19
description: Adversaries may establish persistence and elevate privileges by executing
  malicious content triggered by a Windows Management Instrumentation (WMI) event
  subscription.
detection:
  SELECTION_1:
    ScriptBlockText: '*New-CimInstance *'
  SELECTION_2:
    ScriptBlockText: '*-Namespace root/subscription *'
  SELECTION_3:
    ScriptBlockText: '*-Property *'
  SELECTION_4:
    ScriptBlockText: '*-ClassName __EventFilter *'
  SELECTION_5:
    ScriptBlockText: '*-ClassName CommandLineEventConsumer *'
  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and (SELECTION_4 or SELECTION_5))
falsepositives:
- Unknown
id: 9e07f6e7-83aa-45c6-998e-0af26efd0a85
level: medium
logsource:
  category: ps_script
  definition: EnableScriptBlockLogging must be set to enable
  product: windows
modified: 2021/10/16
references:
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1546.003/T1546.003.md
- https://github.com/EmpireProject/Empire/blob/master/data/module_source/persistence/Persistence.psm1#L545
status: experimental
tags:
- attack.privilege_escalation
- attack.t1546.003
ruletype: SIGMA
