Sigma rule: UAC Bypass With Fake DLL

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-20366d934452, updated 2022-12-25T00:00:00.000Z.

Rule

Title
UAC Bypass With Fake DLL
Status
test
Level
high
Author
oscd.community, Dmitry Uchakin
Date
2020-10-06
Modified
2022-12-25
File
rules/windows/image_load/image_load_uac_bypass_via_dism.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Attempts to load dismcore.dll after dropping it

Log source

product
windows
category
image_load

Detection

selection:
    Image|endswith: '\dism.exe'
    ImageLoaded|endswith: '\dismcore.dll'
filter:
    ImageLoaded: 'C:\Windows\System32\Dism\dismcore.dll'
condition: selection and not filter

False positives (as the rule lists them)

  • Actions of a legitimate telnet client

Tags

  • attack.persistence
  • attack.privilege-escalation
  • attack.execution
  • attack.stealth
  • attack.t1548.002
  • attack.t1574.001

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/image_load/image_load_uac_bypass_via_dism.yml

Sources and licences

  • SigmaHQ

    "UAC Bypass With Fake DLL" by oscd.community, Dmitry Uchakin (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/image_load/image_load_uac_bypass_via_dism.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 With Fake DLL",
entity page, dataset version ref-20366d934452, updated 2022-12-25T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/a5ea83a7-05a5-44c1-be2e-addccbbd8c03 (accessed 2026-11-03).
Underlying source: SigmaHQ rule a5ea83a7-05a5-44c1-be2e-addccbbd8c03, 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.