Sigma rule: Potential CVE-2023-36884 URL Request Pattern Traffic

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-e217065ddaf3, updated 2026-06-14T00:00:00.000Z.

Rule

Title
Potential CVE-2023-36884 URL Request Pattern Traffic
Status
test
Level
high
Author
X__Junior
Date
2023-07-12
Modified
2026-06-14
File
rules-emerging-threats/2023/Exploits/CVE-2023-36884/proxy_exploit_cve_2023_36884_office_windows_html_rce_extenstion_ip_pattern_traffic.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a specific URL pattern containing a specific extension and parameters pointing to an IP address. This pattern was seen being used by RomCOM potentially exploiting CVE-2023-36884

Log source

category
proxy

Detection

# Examples:
#   hxxp://74.50[.]94[.]156/MSHTML_C7/zip_k.asp?d=99.99.99.99.
#   104.234[.]239[.]26/share1/MSHTML_C7/1/99.99.99.99_a15fa_file001.htm?d=99.99.99.99_ a15fa_
selection:
    cs-method: 'GET'
    c-uri|re: '\.(zip|asp|htm|url|xml|chm|mht|vbs|search-ms)\?d=[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.command-and-control
  • cve.2023-36884
  • detection.emerging-threats

CVEs 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-emerging-threats/2023/Exploits/CVE-2023-36884/proxy_exploit_cve_2023_36884_office_windows_html_rce_extenstion_ip_pattern_traffic.yml

Sources and licences

  • SigmaHQ

    "Potential CVE-2023-36884 URL Request Pattern Traffic" by X__Junior (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2023/Exploits/CVE-2023-36884/proxy_exploit_cve_2023_36884_office_windows_html_rce_extenstion_ip_pattern_traffic.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: Potential CVE-2023-36884 URL Request Pattern Traffic",
entity page, dataset version ref-e217065ddaf3, updated 2026-06-14T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/d9365e39-febd-4a4b-8441-3ca91bb9d333 (accessed 2026-11-03).
Underlying source: SigmaHQ rule d9365e39-febd-4a4b-8441-3ca91bb9d333, 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.