PUA - System Informer Execution — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-05-08 / 2024-11-23.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a699e1b5d2a5b434b68bc1eeb129e8597b2984fd271dd8363cdf96751163e9be

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: PUA - System Informer Execution
id: 5722dff1-4bdd-4949-86ab-fbaf707e767a
related:
    - id: 811e0002-b13b-4a15-9d00-a613fce66e42
      type: similar
status: test
description: Detects the execution of System Informer, a task manager tool to view and manipulate processes, kernel options and other low level operations
references:
    - https://github.com/winsiderss/systeminformer
author: Florian Roth (Nextron Systems)
date: 2023-05-08
modified: 2024-11-23
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.discovery
    - attack.stealth
    - attack.t1082
    - attack.t1564
    - attack.t1543
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\SystemInformer.exe'
        - OriginalFileName: 'SystemInformer.exe'
        - Description: 'System Informer'
        - Product: 'System Informer'
        - Hashes|contains:
              # Note: add other hashes as needed
              # 3.0.11077.6550
              - 'MD5=19426363A37C03C3ED6FEDF57B6696EC'
              - 'SHA1=8B12C6DA8FAC0D5E8AB999C31E5EA04AF32D53DC'
              - 'SHA256=8EE9D84DE50803545937A63C686822388A3338497CDDB660D5D69CF68B68F287'
              - 'IMPHASH=B68908ADAEB5D662F87F2528AF318F12'
    condition: selection
falsepositives:
    - System Informer is regularly used legitimately by system administrators or developers. Apply additional filters accordingly
level: medium

Original YAML and metadata in JSON

False positives

• System Informer is regularly used legitimately by system administrators or developers. Apply additional filters accordingly

Source references

• https://github.com/winsiderss/systeminformer