OpenCanary - NMAP NULL Scan

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

title: OpenCanary - NMAP NULL Scan
id: 68b8547b-107f-43f3-97fb-900a7d63c190
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
tags:
    - attack.discovery
    - attack.t1046
logsource:
    category: application
    product: opencanary
detection:
    selection:
        logtype: 5003
    condition: selection
falsepositives:
    - Unlikely
level: high

• T1046Network Service Discovery

• https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration↗
• https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52↗