UAC Bypass Via Wsreset — Sigma Rule

Rule metadata and linked tags

Author: oscd.community, Dmitry Uchakin. Source status: test; severity: high. Source dates: 2020-10-07 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 0973debdaf9e041057bbdc8ba23ca92bc24cfe535640ffd03e54f94a5df4d698

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 Wsreset
id: 6ea3bf32-9680-422d-9f50-e90716b12a66
status: test
description: Unfixed method for UAC bypass from Windows 10. WSReset.exe file associated with the Windows Store. It will run a binary file contained in a low-privilege registry.
references:
    - https://www.bleepingcomputer.com/news/security/trickbot-uses-a-new-windows-10-uac-bypass-to-launch-quietly
    - https://lolbas-project.github.io/lolbas/Binaries/Wsreset
author: oscd.community, Dmitry Uchakin
date: 2020-10-07
modified: 2021-11-27
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: registry_event
    product: windows
detection:
    selection:
        TargetObject|endswith: '\AppX82a6gwre4fdg3bt635tn5ctqjf8msdd2\Shell\open\command'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.bleepingcomputer.com/news/security/trickbot-uses-a-new-windows-10-uac-bypass-to-launch-quietly
• https://lolbas-project.github.io/lolbas/Binaries/Wsreset