sigmahighHunting

HackTool - SysmonEnte Execution

Detects the use of SysmonEnte, a tool to attack the integrity of Sysmon

MITRE ATT&CK

defense-evasion

Detection Query

selection_sysmon:
  TargetImage|contains:
    - :\Windows\Sysmon.exe
    - :\Windows\Sysmon64.exe
  GrantedAccess: "0x1400"
selection_calltrace:
  CallTrace: Ente
filter_main_generic:
  SourceImage|contains:
    - :\Program Files (x86)\
    - :\Program Files\
    - :\Windows\System32\
    - :\Windows\SysWOW64\
filter_main_msdefender:
  SourceImage|contains: :\ProgramData\Microsoft\Windows Defender\Platform\
  SourceImage|endswith: \MsMpEng.exe
condition: ( selection_sysmon and not 1 of filter_main_* ) or selection_calltrace

Author

Florian Roth (Nextron Systems)

Created

2022-09-07

Data Sources

windowsProcess Access Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562.002

Raw Content

title: HackTool - SysmonEnte Execution
id: d29ada0f-af45-4f27-8f32-f7b77c3dbc4e
status: test
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/fe267690fcc799fbda15398243615a30451d9099/screens/1.png
author: Florian Roth (Nextron Systems)
date: 2022-09-07
modified: 2023-11-28
tags:
    - attack.defense-evasion
    - attack.t1562.002
logsource:
    category: process_access
    product: windows
detection:
    selection_sysmon:
        TargetImage|contains:
            - ':\Windows\Sysmon.exe'
            - ':\Windows\Sysmon64.exe'
        GrantedAccess: '0x1400'
    selection_calltrace:
        CallTrace: 'Ente'
    filter_main_generic:
        SourceImage|contains:
            - ':\Program Files (x86)\'
            - ':\Program Files\'
            - ':\Windows\System32\'
            - ':\Windows\SysWOW64\'
    filter_main_msdefender:
        SourceImage|contains: ':\ProgramData\Microsoft\Windows Defender\Platform\'
        SourceImage|endswith: '\MsMpEng.exe'
    condition: ( selection_sysmon and not 1 of filter_main_* ) or selection_calltrace
falsepositives:
    - Unknown
level: high