Sigma rule: File Download From IP Based URL Via CertOC.EXE

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-fa5ad4b304bf, updated 2023-10-18T00:00:00.000Z.

Rule

Title
File Download From IP Based URL Via CertOC.EXE
Status
test
Level
high
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-10-18
File
rules/windows/process_creation/proc_creation_win_certoc_download_direct_ip.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when a user downloads a file from an IP based URL using CertOC.exe

Log source

product
windows
category
process_creation

Detection

selection_img:
    - Image|endswith: '\certoc.exe'
    - OriginalFileName: 'CertOC.exe'
selection_ip:
    CommandLine|re: '://[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
selection_cli:
    CommandLine|contains: '-GetCACAPS'
condition: all of selection*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.command-and-control
  • attack.execution
  • attack.t1105

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_certoc_download_direct_ip.yml

Sources and licences

  • SigmaHQ

    "File Download From IP Based URL Via CertOC.EXE" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_certoc_download_direct_ip.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: File Download From IP Based URL Via CertOC.EXE",
entity page, dataset version ref-fa5ad4b304bf, updated 2023-10-18T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/b86f6dea-0b2f-41f5-bdcc-a057bd19cd6a (accessed 2026-11-03).
Underlying source: SigmaHQ rule b86f6dea-0b2f-41f5-bdcc-a057bd19cd6a, 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.