Potential Persistence Via Scrobj.dll COM Hijacking

Detect use of scrobj.dll as this DLL looks for the ScriptletURL key to get the location of the script to execute

title: Potential Persistence Via Scrobj.dll COM Hijacking
id: fe20dda1-6f37-4379-bbe0-a98d400cae90
status: test
description: Detect use of scrobj.dll as this DLL looks for the ScriptletURL key to get the location of the script to execute
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1546.015/T1546.015.md
author: frack113
date: 2022-08-20
modified: 2023-08-17
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1546.015
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|endswith: 'InprocServer32\(Default)'
        Details: 'C:\WINDOWS\system32\scrobj.dll'
    condition: selection
falsepositives:
    - Legitimate use of the dll.
level: medium
simulation:
    - type: atomic-red-team
      name: COM Hijacking - InprocServer32
      technique: T1546.015
      atomic_guid: 48117158-d7be-441b-bc6a-d9e36e47b52b

• T1546.015Component Object Model Hijacking

• https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1546.015/T1546.015.md↗