Sigma rule: OpenCanary - Telnet Login Attempt

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-5ff4f68ca75f, updated 2024-03-08T00:00:00.000Z.

Rule

Title
OpenCanary - Telnet Login Attempt
Status
test
Level
high
Author
Security Onion Solutions
Date
2024-03-08
File
rules/application/opencanary/opencanary_telnet_login_attempt.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects instances where a Telnet service on an OpenCanary node has had a login attempt.

Log source

product
opencanary
category
application

Detection

selection:
    logtype: 6001
condition: selection

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.privilege-escalation
  • attack.persistence
  • attack.initial-access
  • attack.command-and-control
  • attack.stealth
  • attack.t1133
  • attack.t1078

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/application/opencanary/opencanary_telnet_login_attempt.yml

Sources and licences

  • SigmaHQ

    "OpenCanary - Telnet Login Attempt" by Security Onion Solutions (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/application/opencanary/opencanary_telnet_login_attempt.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: OpenCanary - Telnet Login Attempt",
entity page, dataset version ref-5ff4f68ca75f, updated 2024-03-08T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/512cff7a-683a-43ad-afe0-dd398e872f36 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 512cff7a-683a-43ad-afe0-dd398e872f36, 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.