Successful Application SSO from Rare Unknown Client Device
editSuccessful Application SSO from Rare Unknown Client Device
editDetects successful single sign-on (SSO) events to Okta applications from an unrecognized or "unknown" client device, as identified by the user-agent string. This activity may be indicative of exploitation of a vulnerability in Okta’s Classic Engine, which could allow an attacker to bypass application-specific sign-on policies, such as device or network restrictions. The vulnerability potentially enables unauthorized access to applications using only valid, stolen credentials, without requiring additional authentication factors.
Rule type: new_terms
Rule indices:
- filebeat-*
- logs-okta*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Domain: SaaS
- Data Source: Okta
- Use Case: Threat Detection
- Use Case: Identity and Access Audit
- Tactic: Initial Access
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editevent.dataset: "okta.system" and event.action: "user.authentication.sso" and event.outcome: "success" and okta.client.device: ("Unknown" or "unknown")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
-
Technique:
- Name: Valid Accounts
- ID: T1078
- Reference URL: https://attack.mitre.org/techniques/T1078/