Potential Windows Defender Tampering Via Wmic.EXE — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: high. Source dates: 2022-12-11 / 2023-02-14.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: c9a86aec4376680f12e5593945773462279b8db848c6dd9dfa7c09b3d274b444

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: Potential Windows Defender Tampering Via Wmic.EXE
id: 51cbac1e-eee3-4a90-b1b7-358efb81fa0a
status: test
description: Detects potential tampering with Windows Defender settings such as adding exclusion using wmic
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/5c1e6f1b4fafd01c8d1ece85f510160fc1275fbf/atomics/T1562.001/T1562.001.md
    - https://www.bleepingcomputer.com/news/security/gootkit-malware-bypasses-windows-defender-by-setting-path-exclusions/
    - https://www.bleepingcomputer.com/news/security/iobit-forums-hacked-to-spread-ransomware-to-its-members/
author: frack113
date: 2022-12-11
modified: 2023-02-14
tags:
    - attack.execution
    - attack.defense-impairment
    - attack.t1047
    - attack.t1685
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - OriginalFileName: 'wmic.exe'
        - Image|endswith: '\WMIC.exe'
    selection_cli:
        CommandLine|contains: '/Namespace:\\\\root\\Microsoft\\Windows\\Defender'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high
simulation:
    - type: atomic-red-team
      name: WMIC Tamper with Windows Defender Evade Scanning Folder
      technique: T1562.001
      atomic_guid: 59d386fc-3a4b-41b8-850d-9e3eee24dfe4
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_wmic_namespace_defender/info.yml

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/5c1e6f1b4fafd01c8d1ece85f510160fc1275fbf/atomics/T1562.001/T1562.001.md
• https://www.bleepingcomputer.com/news/security/gootkit-malware-bypasses-windows-defender-by-setting-path-exclusions/
• https://www.bleepingcomputer.com/news/security/iobit-forums-hacked-to-spread-ransomware-to-its-members/