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Attempt to Deactivate an Okta Network Zone

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Attempt to Deactivate an Okta Network Zone

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Detects attempts to deactivate an Okta network zone. Okta network zones can be configured to limit or restrict access to a network based on IP addresses or geolocations. An adversary may attempt to modify, delete, or deactivate an Okta network zone in order to remove or weaken an organization’s security controls.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-okta*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: None (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Use Case: Identity and Access Audit
  • Data Source: Okta
  • Use Case: Network Security Monitoring
  • Tactic: Defense Evasion

Version: 208

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

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Triage and analysis

Investigating Attempt to Deactivate an Okta Network Zone

The Okta network zones can be configured to restrict or limit access to a network based on IP addresses or geolocations. Deactivating a network zone in Okta may remove or weaken the security controls of an organization, which might be an indicator of an adversary’s attempt to evade defenses.

Possible investigation steps

  • Identify the actor related to the alert by reviewing the okta.actor.id, okta.actor.type, okta.actor.alternate_id, or okta.actor.display_name fields.
  • Examine the event.action field to confirm the deactivation of a network zone.
  • Check the okta.target.id, okta.target.type, okta.target.alternate_id, or okta.target.display_name to identify the network zone that was deactivated.
  • Investigate the event.time field to understand when the event happened.
  • Review the actor’s activities before and after the event to understand the context of this event.

False positive analysis

  • Check the okta.client.user_agent.raw_user_agent field to understand the device and software used by the actor. If these match the actor’s normal behavior, it might be a false positive.
  • Check if the actor is a known administrator or part of the IT team who might have a legitimate reason to deactivate a network zone.
  • Verify the actor’s actions with any known planned changes or maintenance activities.

Response and remediation

  • If unauthorized access or actions are confirmed, immediately lock the affected actor account and require a password change.
  • Re-enable the deactivated network zone if it was deactivated without authorization.
  • Review and update the privileges of the actor who initiated the deactivation.
  • Check the security policies and procedures to identify any gaps and update them as necessary.
  • Implement additional monitoring and logging of Okta events to improve visibility of user actions.
  • Communicate and train the employees about the importance of following proper procedures for modifying network zone settings.

Setup

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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:zone.deactivate

Framework: MITRE ATT&CKTM

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