Sigma rule: Powershell WMI Persistence

Rule

Title

Powershell WMI Persistence

Status

test

Level

medium

Author

frack113

Date

2021-08-19

Modified

2022-12-25

File

rules/windows/powershell/powershell_script/posh_ps_wmi_persistence.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Adversaries may establish persistence and elevate privileges by executing malicious content triggered by a Windows Management Instrumentation (WMI) event subscription.

Log source

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 ' # is a variable name
    - ScriptBlockText|contains|all:
          - 'New-CimInstance '
          - '-Namespace root/subscription '
          - '-ClassName CommandLineEventConsumer '
          - '-Property ' # is a variable name
condition: selection_ioc

False positives (as the rule lists them)

• Unknown

Tags

• attack.persistence
• attack.privilege-escalation
• attack.t1546.003

MITRE ATT&CK ids this rule names

• T1546.003

References

• 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

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/powershell/powershell_script/posh_ps_wmi_persistence.yml