Write Protect For Storage Disabled — Sigma Rule

Rule metadata and linked tags

Author: Sreeman. Source status: test; severity: medium. Source dates: 2021-06-11 / 2024-01-18.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 7d672e9590eff13ae4ce93609b419580cd08ee1b51be13749a14d5f39127bc12

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: Write Protect For Storage Disabled
id: 75f7a0e2-7154-4c4d-9eae-5cdb4e0a5c13
status: test
description: |
    Detects applications trying to modify the registry in order to disable any write-protect property for storage devices.
    This could be a precursor to a ransomware attack and has been an observed technique used by cypherpunk group.
references:
    - https://www.manageengine.com/products/desktop-central/os-imaging-deployment/media-is-write-protected.html
author: Sreeman
date: 2021-06-11
modified: 2024-01-18
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: windows
    category: process_creation
detection:
    selection:
        CommandLine|contains|all:
            - '\System\CurrentControlSet\Control'
            - 'Write Protection'
            - '0'
            - 'storage'
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.manageengine.com/products/desktop-central/os-imaging-deployment/media-is-write-protected.html