Attempts to Brute Force an Okta User Account

Identifies when an Okta user account is locked out 3 times within a 3 hour window. An adversary may attempt a brute force or password spraying attack to obtain unauthorized access to user accounts. The default Okta authentication policy ensures that a user account is locked out after 10 failed authentication attempts.

Rule type: threshold

Rule indices:

filebeat-*
logs-okta*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-180m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Identity
Okta
Continuous Monitoring
SecOps
Identity and Access

Version: 8

Rule authors:

Elastic
@BenB196
Austin Songer

Rule license: Elastic License v2

Investigation guide

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## Setup

The Okta Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

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event.dataset:okta.system and event.action:user.account.lock

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Brute Force
- ID: T1110
- Reference URL: https://attack.mitre.org/techniques/T1110/

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