OpenCanary - NMAP NULL Scan

Title: OpenCanary - NMAP NULL Scan
Status: experimental
Description:Detects instances where an OpenCanary node has been targeted by a NMAP NULL Scan
References:
  -https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration
  -https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52
Author: Marco Pedrinazzi (@pedrinazziM)
Date: 2026-01-06
modified:None
Tags:

• -'attack.discovery'
• -'attack.t1046'

Logsource:

• category: application
• product: opencanary

Detection:
  selection:
    logtype: '5003'
  condition:selection
Falsepositives:
  -Unlikely
Level: high