Service Registry Key Read Access Request

Description

Detects "read access" requests on the services registry key. Adversaries may execute their own malicious payloads by hijacking the Registry entries used by services. Adversaries may use flaws in the permissions for Registry keys related to services to redirect from the originally specified executable to one that they control, in order to launch their own code when a service starts.

Query · sigma

selection:
  EventID: 4663
  ObjectName|contains|all:
  - \SYSTEM\
  - ControlSet\Services\
  AccessList|contains: '%%1538'
condition: selection

Known false positives

  • Likely from legitimate applications reading their key. Requires heavy tuning
Raw source Service Registry Key Read Access Request · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Service Registry Key Read Access Request
id: 11d00fff-5dc3-428c-8184-801f292faec0
status: test
description: |
    Detects "read access" requests on the services registry key.
    Adversaries may execute their own malicious payloads by hijacking the Registry entries used by services.
    Adversaries may use flaws in the permissions for Registry keys related to services to redirect from the originally specified executable to one that they control, in order to launch their own code when a service starts.
references:
    - https://center-for-threat-informed-defense.github.io/summiting-the-pyramid/analytics/service_registry_permissions_weakness_check/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1574.011/T1574.011.md#atomic-test-1---service-registry-permissions-weakness
author: Center for Threat Informed Defense (CTID) Summiting the Pyramid Team
date: 2023-09-28
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.011
logsource:
    product: windows
    service: security
    definition: 'Requirements: SACLs must be enabled for "READ_CONTROL" on the registry keys used in this rule'
detection:
    selection:
        EventID: 4663
        ObjectName|contains|all:
            - '\SYSTEM\'
            - 'ControlSet\Services\'
        AccessList|contains: '%%1538' # READ_CONTROL
    condition: selection
falsepositives:
    - Likely from legitimate applications reading their key. Requires heavy tuning
level: low

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