sigmahighHunting

Security Service Disabled Via Reg.EXE

Detects execution of "reg.exe" to disable security services such as Windows Defender.

MITRE ATT&CK

defense-evasion

Detection Query

selection_reg_add:
  CommandLine|contains|all:
    - reg
    - add
selection_cli_reg_start:
  CommandLine|contains|all:
    - d 4
    - v Start
  CommandLine|contains:
    - \AppIDSvc
    - \MsMpSvc
    - \NisSrv
    - \SecurityHealthService
    - \Sense
    - \UsoSvc
    - \WdBoot
    - \WdFilter
    - \WdNisDrv
    - \WdNisSvc
    - \WinDefend
    - \wscsvc
    - \wuauserv
condition: all of selection_*

Author

Florian Roth (Nextron Systems), John Lambert (idea), elhoim

Created

2021-07-14

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562.001

Raw Content

title: Security Service Disabled Via Reg.EXE
id: 5e95028c-5229-4214-afae-d653d573d0ec
status: test
description: Detects execution of "reg.exe" to disable security services such as Windows Defender.
references:
    - https://twitter.com/JohnLaTwC/status/1415295021041979392
    - https://github.com/gordonbay/Windows-On-Reins/blob/e587ac7a0407847865926d575e3c46f68cf7c68d/wor.ps1
    - https://vms.drweb.fr/virus/?i=24144899
    - https://bidouillesecurity.com/disable-windows-defender-in-powershell/
author: Florian Roth (Nextron Systems), John Lambert (idea), elhoim
date: 2021-07-14
modified: 2023-06-05
tags:
    - attack.defense-evasion
    - attack.t1562.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_reg_add:
        CommandLine|contains|all:
            - 'reg'
            - 'add'
    selection_cli_reg_start:
        CommandLine|contains|all:
            - 'd 4'
            - 'v Start'
        CommandLine|contains:
            - '\AppIDSvc'
            - '\MsMpSvc'
            - '\NisSrv'
            - '\SecurityHealthService'
            - '\Sense'
            - '\UsoSvc'
            - '\WdBoot'
            - '\WdFilter'
            - '\WdNisDrv'
            - '\WdNisSvc'
            - '\WinDefend'
            - '\wscsvc'
            - '\wuauserv'
    condition: all of selection_*
falsepositives:
    - Unlikely
level: high