Sigma rule: Potentially Suspicious Regsvr32 HTTP/FTP Pattern

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-80b79ceca0d6, updated 2023-05-26T00:00:00.000Z.

Rule

Title
Potentially Suspicious Regsvr32 HTTP/FTP Pattern
Status
test
Level
medium
Author
Florian Roth (Nextron Systems)
Date
2023-05-24
Modified
2023-05-26
File
rules/windows/process_creation/proc_creation_win_regsvr32_network_pattern.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects regsvr32 execution to download/install/register new DLLs that are hosted on Web or FTP servers.

Log source

product
windows
category
process_creation

Detection

selection_img:
    - Image|endswith: '\regsvr32.exe'
    - OriginalFileName: 'REGSVR32.EXE'
selection_flag:
    CommandLine|contains:
        - ' /i'
        - ' -i'
selection_protocol:
    CommandLine|contains:
        - 'ftp'
        - 'http'
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1218.010

MITRE ATT&CK ids this rule names

Related rules

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_regsvr32_network_pattern.yml

Sources and licences

  • SigmaHQ

    "Potentially Suspicious Regsvr32 HTTP/FTP Pattern" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_regsvr32_network_pattern.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: Potentially Suspicious Regsvr32 HTTP/FTP Pattern",
entity page, dataset version ref-80b79ceca0d6, updated 2023-05-26T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/867356ee-9352-41c9-a8f2-1be690d78216 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 867356ee-9352-41c9-a8f2-1be690d78216, 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.