Cisco Discovery — Sigma Rule

Rule metadata and linked tags

Author: Austin Clark. Source status: test; severity: low. Source dates: 2019-08-12 / 2023-01-04.

{
  "product": "cisco",
  "service": "aaa"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: caaf3675e5ff8db73bd2525f340d7e992209401a7e5f13dd34014d4b3f8cefb5

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Cisco Discovery
id: 9705a6a1-6db6-4a16-a987-15b7151e299b
status: test
description: Find information about network devices that is not stored in config files
references:
    - https://www.cisco.com/c/en/us/td/docs/server_nw_virtual/2-5_release/command_reference/show.html
author: Austin Clark
date: 2019-08-12
modified: 2023-01-04
tags:
    - attack.discovery
    - attack.t1083
    - attack.t1201
    - attack.t1057
    - attack.t1018
    - attack.t1082
    - attack.t1016
    - attack.t1049
    - attack.t1033
    - attack.t1124
logsource:
    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
falsepositives:
    - Commonly used by administrators for troubleshooting
level: low

Original YAML and metadata in JSON

False positives

• Commonly used by administrators for troubleshooting

Source references

• https://www.cisco.com/c/en/us/td/docs/server_nw_virtual/2-5_release/command_reference/show.html