blue-team-tools/rules/windows/process_access/proc_access_win_hack_sysmonente.yml

title: SysmonEnte Usage
id: d29ada0f-af45-4f27-8f32-f7b77c3dbc4e
status: experimental
description: Detects the use of SysmonEnte, a tool to attack the integrity of Sysmon
references:
    - https://codewhitesec.blogspot.com/2022/09/attacks-on-sysmon-revisited-sysmonente.html
    - https://github.com/codewhitesec/SysmonEnte/
    - https://github.com/codewhitesec/SysmonEnte/blob/main/screens/1.png
author: Florian Roth (Nextron Systems)
date: 2022/09/07
modified: 2022/09/09
tags:
    - attack.defense_evasion
    - attack.t1562.002
logsource:
    category: process_access
    product: windows
detection:
    selection_1:
        TargetImage: 'C:\Windows\Sysmon64.exe'
        GrantedAccess: '0x1400'
    filter_1:
        SourceImage|startswith:
            - 'C:\Program Files'
            - 'C:\Windows\System32\'
    filter_msdefender:
        SourceImage|startswith: 'C:\ProgramData\Microsoft\Windows Defender\Platform\'
        SourceImage|endswith: '\MsMpEng.exe'
    selection_calltrace:
        CallTrace: 'Ente'
    condition: ( selection_1 and not 1 of filter_* ) or selection_calltrace
falsepositives:
    - Unknown
level: high