Sigma rule: Network Scans Count By Destination IP

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-f0ad52db238c, updated 2023-03-24T00:00:00.000Z.

Rule

Title
Network Scans Count By Destination IP
Status
unsupported
Level
medium
Author
Thomas Patzke
Date
2017/02/19
Modified
2023/03/24
File
unsupported/network/net_firewall_susp_network_scan_by_ip.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects many failed connection attempts to different ports or hosts

Log source

category
firewall

Detection

selection:
    action: denied
timeframe: 24h
condition: selection | count(dst_ip) by src_ip > 10

False positives (as the rule lists them)

  • Inventarization systems
  • Vulnerability scans

Tags

  • attack.discovery
  • attack.t1046

MITRE ATT&CK ids this rule names

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/unsupported/network/net_firewall_susp_network_scan_by_ip.yml

Sources and licences

  • SigmaHQ

    "Network Scans Count By Destination IP" by Thomas Patzke (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/unsupported/network/net_firewall_susp_network_scan_by_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: Network Scans Count By Destination IP",
entity page, dataset version ref-f0ad52db238c, updated 2023-03-24T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4601eaec-6b45-4052-ad32-2d96d26ce0d8 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4601eaec-6b45-4052-ad32-2d96d26ce0d8, 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.