Sysinternals PsService Execution — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2022-06-16 / 2023-02-24.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: ba4bd59a11e80c8b69699b7c11d049cdc06b6560da78e09dead00d7a4a18b9a7

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: Sysinternals PsService Execution
id: 3371f518-5fe3-4cf6-a14b-2a0ae3fd8a4f
status: test
description: Detects usage of Sysinternals PsService which can be abused for service reconnaissance and tampering
references:
    - https://learn.microsoft.com/en-us/sysinternals/downloads/psservice
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-16
modified: 2023-02-24
tags:
    - attack.privilege-escalation
    - attack.discovery
    - attack.persistence
    - attack.t1543.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - OriginalFileName: 'psservice.exe'
        - Image|endswith:
              - '\PsService.exe'
              - '\PsService64.exe'
    condition: selection
falsepositives:
    - Legitimate use of PsService by an administrator
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate use of PsService by an administrator

Source references

• https://learn.microsoft.com/en-us/sysinternals/downloads/psservice