Sigma rule: Cisco Discovery

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-f9a86007b9b0, updated 2023-01-04T00:00:00.000Z.

Rule

Title
Cisco Discovery
Status
test
Level
low
Author
Austin Clark
Date
2019-08-12
Modified
2023-01-04
File
rules/network/cisco/aaa/cisco_cli_discovery.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Find information about network devices that is not stored in config files

Log source

product
cisco
service
aaa

Detection

keywords:
    - 'dir'
    - 'show arp'
    - 'show cdp'
    - 'show clock'
    - 'show ip interface'
    - 'show ip route'
    - 'show ip sockets'
    - 'show processes'
    - 'show ssh'
    - 'show users'
    - 'show version'
condition: keywords

False positives (as the rule lists them)

  • Commonly used by administrators for troubleshooting

Tags

  • attack.discovery
  • attack.t1083
  • attack.t1201
  • attack.t1057
  • attack.t1018
  • attack.t1082
  • attack.t1016
  • attack.t1049
  • attack.t1033
  • attack.t1124

MITRE ATT&CK ids this rule names

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/network/cisco/aaa/cisco_cli_discovery.yml

Sources and licences

  • SigmaHQ

    "Cisco Discovery" by Austin Clark (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/network/cisco/aaa/cisco_cli_discovery.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 Discovery",
entity page, dataset version ref-f9a86007b9b0, updated 2023-01-04T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/9705a6a1-6db6-4a16-a987-15b7151e299b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 9705a6a1-6db6-4a16-a987-15b7151e299b, 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.