UAC Bypass via Sdclt — Sigma Rule

Rule metadata and linked tags

Author: Omer Yampel, Christian Burkard (Nextron Systems). Source status: test; severity: high. Source dates: 2017-03-17 / 2023-08-17.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 08d3e303615be9b2cc2d029d2fcd32f6cc67863e682b91a045b7e4eae569a2cb

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 Sdclt
id: 5b872a46-3b90-45c1-8419-f675db8053aa
status: test
description: Detects the pattern of UAC Bypass using registry key manipulation of sdclt.exe (e.g. UACMe 53)
references:
    - https://enigma0x3.net/2017/03/17/fileless-uac-bypass-using-sdclt-exe/
    - https://github.com/hfiref0x/UACME
author: Omer Yampel, Christian Burkard (Nextron Systems)
date: 2017-03-17
modified: 2023-08-17
tags:
    - attack.privilege-escalation
    - attack.t1548.002
    - car.2019-04-001
logsource:
    category: registry_set
    product: windows
detection:
    selection1:
        TargetObject|endswith: 'Software\Classes\exefile\shell\runas\command\isolatedCommand'
    selection2:
        TargetObject|endswith: 'Software\Classes\Folder\shell\open\command\SymbolicLinkValue'
        Details|re: '-1[0-9]{3}\\Software\\Classes\\'
    condition: 1 of selection*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://enigma0x3.net/2017/03/17/fileless-uac-bypass-using-sdclt-exe/
• https://github.com/hfiref0x/UACME