Sigma rule: Renamed Rundll32.exe Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0bcf8a32aaef, updated 2023-01-18T00:00:00.000Z.

SigmaHQ marks this rule as deprecated.

Rule

Title
Renamed Rundll32.exe Execution
Status
deprecated
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022/06/08
Modified
2023/01/18
File
deprecated/windows/proc_creation_win_renamed_rundll32.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the execution of rundll32.exe that has been renamed to a different name to avoid detection

Log source

product
windows
category
process_creation

Detection

selection:
    OriginalFileName: 'RUNDLL32.EXE'
filter:
    Image|endswith: '\rundll32.exe'
condition: selection and not filter

False positives (as the rule lists them)

  • Unknown

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/proc_creation_win_renamed_rundll32.yml

Sources and licences

  • SigmaHQ

    "Renamed Rundll32.exe Execution" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/proc_creation_win_renamed_rundll32.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: Renamed Rundll32.exe Execution",
entity page, dataset version ref-0bcf8a32aaef, updated 2023-01-18T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/d4d2574f-ac17-4d9e-b986-aeeae0dc8fe2 (accessed 2026-11-03).
Underlying source: SigmaHQ rule d4d2574f-ac17-4d9e-b986-aeeae0dc8fe2, 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.