Sigma rule: Service Registry Permissions Weakness Check

Rule

Title

Service Registry Permissions Weakness Check

Status

test

Level

medium

Author

frack113

Date

2021-12-30

File

rules/windows/powershell/powershell_script/posh_ps_get_acl_service.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Adversaries may execute their own malicious payloads by hijacking the Registry entries used by services.
Adversaries may use flaws in the permissions for registry to redirect from the originally specified executable to one that they control, in order to launch their own code at Service start.
Windows stores local service configuration information in the Registry under HKLM\SYSTEM\CurrentControlSet\Services

Log source

product

windows

category

ps_script

definition

Requirements: Script Block Logging must be enabled

Detection

selection:
    ScriptBlockText|contains|all:
        - 'get-acl'
        - 'REGISTRY::HKLM\SYSTEM\CurrentControlSet\Services\'
condition: selection

False positives (as the rule lists them)

• Legitimate administrative script

Tags

• attack.privilege-escalation
• attack.persistence
• attack.execution
• attack.stealth
• attack.t1574.011
• stp.2a

MITRE ATT&CK ids this rule names

• T1574.011

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1574.011/T1574.011.md#atomic-test-1---service-registry-permissions-weakness
• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.security/get-acl?view=powershell-7.4

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_get_acl_service.yml