Name:Okta Phishing Detection with FastPass Origin Check id:f4ca0057-cbf3-44f8-82ea-4e330ee901d3 version:3 date:2024-10-17 author:Okta, Inc, Michael Haag, Splunk status:experimental type:TTP Description:The following analytic identifies failed user authentication attempts in Okta due to FastPass declining a phishing attempt. It leverages Okta logs, specifically looking for events where multi-factor authentication (MFA) fails with the reason "FastPass declined phishing attempt." This activity is significant as it indicates that attackers are targeting users with real-time phishing proxies, attempting to capture credentials. If confirmed malicious, this could lead to unauthorized access to user accounts, potentially compromising sensitive information and furthering lateral movement within the organization. Data_source:
-Okta
search:`okta` eventType="user.authentication.auth_via_mfa" AND result="FAILURE" AND outcome.reason="FastPass declined phishing attempt" | stats count min(_time) as firstTime max(_time) as lastTime values(displayMessage) by user eventType client.userAgent.rawUserAgent client.userAgent.browser outcome.reason | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `okta_phishing_detection_with_fastpass_origin_check_filter`
how_to_implement:This search is specific to Okta and requires Okta logs to be ingested in your Splunk deployment. known_false_positives:Fidelity of this is high as Okta is specifying malicious infrastructure. Filter and modify as needed. References: -https://sec.okta.com/fastpassphishingdetection drilldown_searches:
: tags: analytic_story: - 'Okta Account Takeover' asset_type:Infrastructure confidence:100 impact:100 message:Okta FastPass has prevented $user$ from authenticating to a malicious site. mitre_attack_id: - 'T1078' - 'T1078.001' - 'T1556' observable: name:'user' type:'User' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - '_time' - 'eventType' - 'client.userAgent.rawUserAgent' - 'client.userAgent.browser' - 'outcome.reason' - 'displayMessage' risk_score:100 security_domain:access
