Sigma rule: Okta User Session Start Via An Anonymising Proxy Service

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-2112f0dede1d, updated 2026-04-27T00:00:00.000Z.

Rule

Title
Okta User Session Start Via An Anonymising Proxy Service
Status
test
Level
high
Author
kelnage
Date
2023-09-07
Modified
2026-04-27
File
rules/identity/okta/okta_user_session_start_via_anonymised_proxy.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when an Okta user session starts where the user is behind an anonymising proxy service.

Log source

product
okta
service
okta

Detection

selection:
    eventType: 'user.session.start'
    securityContext.isProxy: 'true'
condition: selection

False positives (as the rule lists them)

  • If a user requires an anonymising proxy due to valid justifications.

Tags

  • attack.defense-impairment
  • attack.t1685

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/identity/okta/okta_user_session_start_via_anonymised_proxy.yml

Sources and licences

  • SigmaHQ

    "Okta User Session Start Via An Anonymising Proxy Service" by kelnage (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/identity/okta/okta_user_session_start_via_anonymised_proxy.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: Okta User Session Start Via An Anonymising Proxy Service",
entity page, dataset version ref-2112f0dede1d, updated 2026-04-27T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/bde30855-5c53-4c18-ae90-1ff79ebc9578 (accessed 2026-11-03).
Underlying source: SigmaHQ rule bde30855-5c53-4c18-ae90-1ff79ebc9578, 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.