Suspicious Service Installation Script — Sigma Rule

Rule metadata and linked tags

Author: pH-T (Nextron Systems). Source status: test; severity: high. Source dates: 2022-03-18 / 2024-03-05.

{
  "product": "windows",
  "service": "system"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: e56edcd49c5dd552a4c8d6000b8dd9d9f3731988b89af0e98b26c6e89a75b27a

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: Suspicious Service Installation Script
id: 70f00d10-60b2-4f34-b9a0-dc3df3fe762a
status: test
description: Detects suspicious service installation scripts
references:
    - Internal Research
author: pH-T (Nextron Systems)
date: 2022-03-18
modified: 2024-03-05
tags:
    - attack.persistence
    - attack.privilege-escalation
    - car.2013-09-005
    - attack.t1543.003
logsource:
    product: windows
    service: system
detection:
    selection_eid:
        Provider_Name: 'Service Control Manager'
        EventID: 7045
    selection_cmd_flags:
        ImagePath|contains|windash:
            - ' -c '
            - ' -r '
            - ' -k '
    selection_binaries:
        ImagePath|contains:
            - 'cscript'
            - 'mshta'
            - 'powershell'
            - 'pwsh'
            - 'regsvr32'
            - 'rundll32'
            - 'wscript'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• Internal Research (source note; no public URL supplied)