Sigma rule: UtilityFunctions.ps1 Proxy Dll

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-e6d930026d94, updated 2022-05-28T00:00:00.000Z.

Rule

Title
UtilityFunctions.ps1 Proxy Dll
Status
test
Level
medium
Author
frack113
Date
2022-05-28
File
rules/windows/process_creation/proc_creation_win_lolbin_utilityfunctions.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of a Microsoft signed script executing a managed DLL with PowerShell.

Log source

product
windows
category
process_creation

Detection

selection:
    CommandLine|contains:
        - 'UtilityFunctions.ps1'
        - 'RegSnapin '
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1216

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_lolbin_utilityfunctions.yml

Sources and licences

  • SigmaHQ

    "UtilityFunctions.ps1 Proxy Dll" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_lolbin_utilityfunctions.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: UtilityFunctions.ps1 Proxy Dll",
entity page, dataset version ref-e6d930026d94, updated 2022-05-28T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0403d67d-6227-4ea8-8145-4e72db7da120 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0403d67d-6227-4ea8-8145-4e72db7da120, 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.