Sigma rule: Cisco Sniffing

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-ead3443bf1b8, updated 2023-01-04T00:00:00.000Z.

Rule

Title
Cisco Sniffing
Status
test
Level
medium
Author
Austin Clark
Date
2019-08-11
Modified
2023-01-04
File
rules/network/cisco/aaa/cisco_cli_net_sniff.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Show when a monitor or a span/rspan is setup or modified

Log source

product
cisco
service
aaa

Detection

keywords:
    - 'monitor capture point'
    - 'set span'
    - 'set rspan'
condition: keywords

False positives (as the rule lists them)

  • Admins may setup new or modify old spans, or use a monitor for troubleshooting

Tags

  • attack.credential-access
  • attack.discovery
  • attack.t1040

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/rules/network/cisco/aaa/cisco_cli_net_sniff.yml

Sources and licences

  • SigmaHQ

    "Cisco Sniffing" by Austin Clark (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/network/cisco/aaa/cisco_cli_net_sniff.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: Cisco Sniffing",
entity page, dataset version ref-ead3443bf1b8, updated 2023-01-04T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/b9e1f193-d236-4451-aaae-2f3d2102120d (accessed 2026-11-03).
Underlying source: SigmaHQ rule b9e1f193-d236-4451-aaae-2f3d2102120d, 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.