Hidden Local User Creation

Description

Detects the creation of a local hidden user account which should not happen for event ID 4720.

Query · sigma

selection:
  EventID: 4720
  TargetUserName|endswith: $
filter_main_homegroup:
  TargetUserName: HomeGroupUser$
condition: selection and not 1 of filter_main_*

Known false positives

  • Unknown
Raw source Hidden Local User Creation · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Hidden Local User Creation
id: 7b449a5e-1db5-4dd0-a2dc-4e3a67282538
status: test
description: Detects the creation of a local hidden user account which should not happen for event ID 4720.
references:
    - https://twitter.com/SBousseaden/status/1387743867663958021
author: Christian Burkard (Nextron Systems)
date: 2021-05-03
modified: 2024-01-16
tags:
    - attack.persistence
    - attack.t1136.001
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4720
        TargetUserName|endswith: '$'
    filter_main_homegroup:
        TargetUserName: 'HomeGroupUser$'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high

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