UAC Bypass via ICMLuaUtil — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems), Elastic (idea). Source status: test; severity: high. Source dates: 2022-09-13 / 2022-09-27.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 3a32c7ca32a2bbdb62824c29a47bd4809ee32a1f39b881810d765cd6b9c1a6d3

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: UAC Bypass via ICMLuaUtil
id: 49f2f17b-b4c8-4172-a68b-d5bf95d05130
status: test
description: Detects the pattern of UAC Bypass using ICMLuaUtil Elevated COM interface
references:
    - https://www.elastic.co/guide/en/security/current/uac-bypass-via-icmluautil-elevated-com-interface.html
author: Florian Roth (Nextron Systems), Elastic (idea)
date: 2022-09-13
modified: 2022-09-27
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\dllhost.exe'
        ParentCommandLine|contains:
            - '/Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}'
            - '/Processid:{D2E7041B-2927-42FB-8E9F-7CE93B6DC937}'
    filter:
        - Image|endswith: '\WerFault.exe'
        - OriginalFileName: 'WerFault.exe'
    condition: selection and not filter
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.elastic.co/guide/en/security/current/uac-bypass-via-icmluautil-elevated-com-interface.html