Taskmgr as LOCAL_SYSTEM — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2018-03-18 / 2022-05-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 812790881847f6983e299c1aab4d512672a255f4e9ebc50a2ea7cd3ab8e8d892

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: Taskmgr as LOCAL_SYSTEM
id: 9fff585c-c33e-4a86-b3cd-39312079a65f
status: test
description: Detects the creation of taskmgr.exe process in context of LOCAL_SYSTEM
references:
    - Internal Research
author: Florian Roth (Nextron Systems)
date: 2018-03-18
modified: 2022-05-27
tags:
    - attack.stealth
    - attack.t1036
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        User|contains: # covers many language settings
            - 'AUTHORI'
            - 'AUTORI'
        Image|endswith: '\taskmgr.exe'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

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