PowerShell Create Local User — Sigma Rule

Rule metadata and linked tags

Author: @ROxPinTeddy. Source status: test; severity: medium. Source dates: 2020-04-11 / 2022-12-25.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "Requirements: Script Block Logging must be enabled"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: fd7dd1cb197938c70e3e7201d9c9837c4c12c94d2f88f26d770c1bbb32fbdca4

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: PowerShell Create Local User
id: 243de76f-4725-4f2e-8225-a8a69b15ad61
status: test
description: Detects creation of a local user via PowerShell
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1136.001/T1136.001.md
author: '@ROxPinTeddy'
date: 2020-04-11
modified: 2022-12-25
tags:
    - attack.execution
    - attack.t1059.001
    - attack.persistence
    - attack.t1136.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains: 'New-LocalUser'
    condition: selection
falsepositives:
    - Legitimate user creation
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate user creation

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1136.001/T1136.001.md