Windows Defender Service Disabled - Registry — Sigma Rule

Rule metadata and linked tags

Author: Ján Trenčanský, frack113, AlertIQ, Nasreddine Bencherchali. Source status: test; severity: high. Source dates: 2022-08-01 / 2024-03-25.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1d007c9754e29aca365a8d2512c0f48804a00f1d9c3cb60d0fc17d48ae1e3d6e

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: Windows Defender Service Disabled - Registry
id: e1aa95de-610a-427d-b9e7-9b46cfafbe6a
status: test
description: Detects when an attacker or tool disables the  Windows Defender service (WinDefend) via the registry
references:
    - https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/
    - https://gist.github.com/anadr/7465a9fde63d41341136949f14c21105
author: Ján Trenčanský, frack113, AlertIQ, Nasreddine Bencherchali
date: 2022-08-01
modified: 2024-03-25
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: windows
    category: registry_set
detection:
    selection:
        TargetObject|endswith: '\Services\WinDefend\Start'
        Details: 'DWORD (0x00000004)'
    condition: selection
falsepositives:
    - Administrator actions
level: high

Original YAML and metadata in JSON

False positives

• Administrator actions

Source references

• https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/
• https://gist.github.com/anadr/7465a9fde63d41341136949f14c21105