Sigma rule: OpenCanary - NMAP FIN Scan

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-45b3d36283e4, updated 2026-01-06T00:00:00.000Z.

Rule

Title: OpenCanary - NMAP FIN Scan
Status: experimental
Level: high
Author: Marco Pedrinazzi (@pedrinazziM)
Date: 2026-01-06
File: rules/application/opencanary/opencanary_portscan_nmap_fin_scan.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects instances where an OpenCanary node has been targeted by a NMAP FIN Scan

Log source

product: opencanary
category: application

Detection

selection:
    logtype: 5005
condition: selection

False positives (as the rule lists them)

Unlikely

MITRE ATT&CK ids this rule names

T1046

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/application/opencanary/opencanary_portscan_nmap_fin_scan.yml

Sources and licences

SigmaHQ
"OpenCanary - NMAP FIN Scan" by Marco Pedrinazzi (@pedrinazziM) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/application/opencanary/opencanary_portscan_nmap_fin_scan.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: OpenCanary - NMAP FIN Scan",
entity page, dataset version ref-45b3d36283e4, updated 2026-01-06T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/eae8c0c8-e5da-450a-9d7d-66aa56cd26b6 (accessed 2026-11-03).
Underlying source: SigmaHQ rule eae8c0c8-e5da-450a-9d7d-66aa56cd26b6, 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.