Service Installed By Unusual Client - Security — Sigma Rule

Rule metadata and linked tags

Author: Tim Rauch (Nextron Systems), Elastic (idea). Source status: test; severity: high. Source dates: 2022-09-15 / 2023-01-04.

{
  "service": "security",
  "product": "windows",
  "definition": "Requirements: The System Security Extension audit subcategory need to be enabled to log the EID 4697"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: e73f848892c6fd431bf926f2b157d52adc1aee9ece6d4f40712acd8a8045f721

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Service Installed By Unusual Client - Security
id: c4e92a97-a9ff-4392-9d2d-7a4c642768ca
related:
    - id: 71c276aa-49cd-43d2-b920-2dcd3e6962d5
      type: similar
status: test
description: Detects a service installed by a client which has PID 0 or whose parent has PID 0
references:
    - https://www.elastic.co/guide/en/security/current/windows-service-installed-via-an-unusual-client.html
    - https://www.x86matthew.com/view_post?id=create_svc_rpc
    - https://twitter.com/SBousseaden/status/1490608838701166596
author: Tim Rauch (Nextron Systems), Elastic (idea)
date: 2022-09-15
modified: 2023-01-04
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1543
logsource:
    service: security
    product: windows
    definition: 'Requirements: The System Security Extension audit subcategory need to be enabled to log the EID 4697'
detection:
    selection_eid:
        EventID: 4697
    selection_pid:
        - ClientProcessId: 0
        - ParentProcessId: 0
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.elastic.co/guide/en/security/current/windows-service-installed-via-an-unusual-client.html
• https://www.x86matthew.com/view_post?id=create_svc_rpc
• https://twitter.com/SBousseaden/status/1490608838701166596