Service Registry Key Deleted Via Reg.EXE — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2022-08-01 / 2023-02-04.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 3870f69519e3ef090c9012934c538979d0b569de52ec34a2ff0951eef136e148

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: Service Registry Key Deleted Via Reg.EXE
id: 05b2aa93-1210-42c8-8d9a-2fcc13b284f5
status: test
description: Detects execution of "reg.exe" commands with the "delete" flag on services registry key. Often used by attacker to remove AV software services
references:
    - https://www.virustotal.com/gui/file/2bcd5702a7565952c44075ac6fb946c7780526640d1264f692c7664c02c68465
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-01
modified: 2023-02-04
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: 'reg.exe'
        - OriginalFileName: 'reg.exe'
    selection_delete:
        CommandLine|contains: ' delete '
    selection_key:
        # Add specific services if you would like the rule to be more specific
        CommandLine|contains: '\SYSTEM\CurrentControlSet\services\'
    condition: all of selection_*
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://www.virustotal.com/gui/file/2bcd5702a7565952c44075ac6fb946c7780526640d1264f692c7664c02c68465