Okta FastPass Phishing Detection — Sigma Rule

Rule metadata and linked tags

Author: Austin Songer @austinsonger. Source status: test; severity: high. Source dates: 2023-05-07 / 2026-04-27.

{
  "product": "okta",
  "service": "okta"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a7c61e315409fa83b78ce37dbee2debd26cdcb88048abd540a8c10d7408eda09

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: Okta FastPass Phishing Detection
id: ee39a9f7-5a79-4b0a-9815-d36b3cf28d3e
status: test
description: Detects when Okta FastPass prevents a known phishing site.
references:
    - https://sec.okta.com/fastpassphishingdetection
    - https://developer.okta.com/docs/reference/api/system-log/
    - https://developer.okta.com/docs/reference/api/event-types/
author: Austin Songer @austinsonger
date: 2023-05-07
modified: 2026-04-27
tags:
    - attack.initial-access
    - attack.t1566
logsource:
    product: okta
    service: okta
detection:
    selection:
        outcome.reason: 'FastPass declined phishing attempt'
        outcome.result: FAILURE
        eventType: user.authentication.auth_via_mfa
    condition: selection
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://sec.okta.com/fastpassphishingdetection
• https://developer.okta.com/docs/reference/api/system-log/
• https://developer.okta.com/docs/reference/api/event-types/