COM Hijacking via TreatAs

testmedium
Log-Quelle: windows · registry_setAutor frack113Datum 2022-08-28
01

Beschreibung

Was dies ist, in Kürze.

Detect modification of TreatAs key to enable "rundll32.exe -sta" command

02

Tags

attack.privilege-escalationattack.persistenceattack.t1546.015
03

Regelquelle (YAML)

title: COM Hijacking via TreatAs
id: dc5c24af-6995-49b2-86eb-a9ff62199e82
status: test
description: Detect modification of TreatAs key to enable "rundll32.exe -sta" command
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1546.015/T1546.015.md
    - https://www.youtube.com/watch?v=3gz1QmiMhss&t=1251s
author: frack113
date: 2022-08-28
modified: 2025-07-11
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1546.015
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|endswith: 'TreatAs\(Default)'
    filter_office:
        Image|startswith: 'C:\Program Files\Common Files\Microsoft Shared\ClickToRun\'
        Image|endswith: '\OfficeClickToRun.exe'
    filter_office2:
        Image:
            - 'C:\Program Files\Microsoft Office\root\integration\integrator.exe'
            - 'C:\Program Files (x86)\Microsoft Office\root\integration\integrator.exe'
    filter_svchost:
        # Example of target object by svchost
        # TargetObject: HKLM\SOFTWARE\Microsoft\MsixRegistryCompatibility\Package\Microsoft.Paint_11.2208.6.0_x64__8wekyb3d8bbwe\User\SOFTWARE\Classes\CLSID\{0003000A-0000-0000-C000-000000000046}\TreatAs\(Default)
        # TargetObject: HKU\S-1-5-21-1000000000-000000000-000000000-0000_Classes\CLSID\{0003000A-0000-0000-C000-000000000046}\TreatAs\(Default)
        Image: 'C:\Windows\system32\svchost.exe'
    filter_misexec:
        # This FP has been seen during installation/updates
        Image:
            - 'C:\Windows\system32\msiexec.exe'
            - 'C:\Windows\SysWOW64\msiexec.exe'
    condition: selection and not 1 of filter_*
falsepositives:
    - Legitimate use
level: medium
simulation:
    - type: atomic-red-team
      name: COM hijacking via TreatAs
      technique: T1546.015
      atomic_guid: 33eacead-f117-4863-8eb0-5c6304fbfaa9
04

erkennt Techniken (1)

ATT&CK-Techniken, die dies ermöglicht oder abbildet.

05

Referenzen

Externe Belege — Patches, Meldungen, Analysen.