Sigma rule: UAC Bypass Tools Using ComputerDefaults

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-ff7181eb1526, updated 2024-12-01T00:00:00.000Z.

Rule

Title
UAC Bypass Tools Using ComputerDefaults
Status
test
Level
high
Author
Christian Burkard (Nextron Systems)
Date
2021-08-31
Modified
2024-12-01
File
rules/windows/process_creation/proc_creation_win_uac_bypass_computerdefaults.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects tools such as UACMe used to bypass UAC with computerdefaults.exe (UACMe 59)

Log source

product
windows
category
process_creation

Detection

selection:
    IntegrityLevel:
        - 'High'
        - 'System'
        - 'S-1-16-16384' # System
        - 'S-1-16-12288' # High
    Image: 'C:\Windows\System32\ComputerDefaults.exe'
filter:
    ParentImage|contains:
        - ':\Windows\System32'
        - ':\Program Files'
condition: selection and not filter

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.t1548.002

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_uac_bypass_computerdefaults.yml

Sources and licences

  • SigmaHQ

    "UAC Bypass Tools Using ComputerDefaults" by Christian Burkard (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_uac_bypass_computerdefaults.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: UAC Bypass Tools Using ComputerDefaults",
entity page, dataset version ref-ff7181eb1526, updated 2024-12-01T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/3c05e90d-7eba-4324-9972-5d7f711a60a8 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 3c05e90d-7eba-4324-9972-5d7f711a60a8, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.