title: Okta User Session Start Via An Anonymising Proxy Service
id: bde30855-5c53-4c18-ae90-1ff79ebc9578
status: test
description: Detects when an Okta user session starts where the user is behind an anonymising proxy service.
references:
- https://developer.okta.com/docs/reference/api/system-log/
- https://sec.okta.com/articles/2023/08/cross-tenant-impersonation-prevention-and-detection
author: kelnage
date: 2023-09-07
modified: 2026-04-27
tags:
- attack.defense-impairment
- attack.t1685
logsource:
product: okta
service: okta
detection:
selection:
eventType: 'user.session.start'
securityContext.isProxy: 'true'
condition: selection
falsepositives:
- If a user requires an anonymising proxy due to valid justifications.
level: high