SigmaHQ/rules/windows/process_creation/win_susp_service_dacl_modification.yml

title: Suspicious Service DACL Modification
id: 99cf1e02-00fb-4c0d-8375-563f978dfd37
description: Detects suspicious DACL modifications that can  be used to hide services or make them unstopable
author: Jonhnathan Ribeiro, oscd.community
status: experimental
date: 2020/10/16
references:
    - https://www.sans.org/blog/red-team-tactics-hiding-windows-services/
    - https://docs.microsoft.com/pt-br/windows/win32/secauthz/sid-strings
tags:
    - attack.persistence
    - attack.t1543.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\sc.exe'
        CommandLine|contains|all:
            - 'sdset'
            - 'D;;'
    sids:
        CommandLine|contains:
            - ';;;IU'
            - ';;;SU'
            - ';;;BA'
            - ';;;SY'
            - ';;;WD'
    condition: selection and sids
falsepositives:
    - Unknown
level: high