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High Number of Okta User Password Reset or Unlock Attempts

Identifies a high number of Okta user password reset or account unlock attempts. An adversary may attempt to obtain unauthorized access to Okta user accounts using these methods and attempt to blend in with normal activity in their target's environment and evade detection.

Rule type: threshold
Rule indices:

  • filebeat-*
  • logs-okta*

Rule Severity: medium
Risk Score: 47
Runs every:
Searches indices from: now-60m
Maximum alerts per execution: ?
References:

Tags:

  • Use Case: Identity and Access Audit
  • Data Source: Okta
  • Tactic: Defense Evasion
  • Resources: Investigation Guide

Version: ?
Rule authors:

  • Elastic
  • @BenB196
  • Austin Songer

Rule license: Elastic License v2

This rule is designed to detect a suspiciously high number of password reset or account unlock attempts in Okta. Excessive password resets or account unlocks can be indicative of an attacker's attempt to gain unauthorized access to an account.

  • Identify the actor associated with the excessive attempts. The okta.actor.alternate_id field can be used for this purpose.
  • Determine the client used by the actor. You can look at okta.client.device, okta.client.ip, okta.client.user_agent.raw_user_agent, okta.client.ip_chain.ip, and okta.client.geographical_context.
  • Review the okta.outcome.result and okta.outcome.reason fields to understand the outcome of the password reset or unlock attempts.
  • Review the event actions associated with these attempts. Look at the event.action field and filter for actions related to password reset and account unlock attempts.
  • Check for other similar patterns of behavior from the same actor or IP address. If there is a high number of failed login attempts before the password reset or unlock attempts, this may suggest a brute force attack.
  • Also, look at the times when these attempts were made. If these were made during off-hours, it could further suggest an adversary's activity.
  • This alert might be a false positive if there are legitimate reasons for a high number of password reset or unlock attempts. This could be due to the user forgetting their password or account lockouts due to too many incorrect attempts.
  • Check the actor's past behavior. If this is their usual behavior and they have a valid reason for it, then it might be a false positive.
  • If unauthorized attempts are confirmed, initiate the incident response process.
  • Reset the user's password and enforce MFA re-enrollment, if applicable.
  • Block the IP address or device used in the attempts, if they appear suspicious.
  • If the attack was facilitated by a particular technique, ensure your systems are patched or configured to prevent such techniques.
  • Consider a security review of your Okta policies and rules to ensure they follow security best practices.

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

event.dataset:okta.system and
  event.action:(system.email.account_unlock.sent_message or system.email.password_reset.sent_message or
                system.sms.send_account_unlock_message or system.sms.send_password_reset_message or
                system.voice.send_account_unlock_call or system.voice.send_password_reset_call or
                user.account.unlock_token)

Framework: MITRE ATT&CK

Framework: MITRE ATT&CK

Framework: MITRE ATT&CK