IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Potential Abuse of Repeated MFA Push Notifications

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Potential Abuse of Repeated MFA Push Notifications

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Detects when an attacker abuses the Multi-Factor authentication mechanism by repeatedly issuing login requests until the user eventually accepts the Okta push notification. An adversary may attempt to bypass the Okta MFA policies configured for an organization to obtain unauthorized access.

Rule type: eql

Rule indices:

filebeat-*
logs-okta*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://www.mandiant.com/resources/russian-targeting-gov-business

Tags:

Elastic
Identity
Okta
Continuous Monitoring
SecOps
Identity and Access

Version: 100 (version history)

Added (Elastic Stack release): 8.1.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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sequence by user.email with maxspan=10m [any where event.module ==
"okta" and event.action == "user.mfa.okta_verify.deny_push"] [any
where event.module == "okta" and event.action ==
"user.mfa.okta_verify.deny_push"] [any where event.module == "okta"
and event.action == "user.authentication.sso"]

Threat mapping

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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/

Rule version history

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Version 100 (8.5.0 release)

Formatting only

Version 4 (8.4.0 release)

Formatting only

Version 2 (8.2.0 release)

Formatting only

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