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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Elastic Docs ›Elastic Security Solution [7.16] ›Detections and alerts ›Prebuilt rule reference

AWS IAM Deactivation of MFA Device

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AWS IAM Deactivation of MFA Device

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Identifies the deactivation of a specified multi-factor authentication (MFA) device and removes it from association with the user name for which it was originally enabled. In AWS Identity and Access Management (IAM), a device must be deactivated before it can be deleted.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-aws*

Severity: medium

Risk score: 47

Runs every: 10 minutes

Searches indices from: now-60m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • AWS
  • Continuous Monitoring
  • SecOps
  • Monitoring

Version: 5 (version history)

Added (Elastic Stack release): 7.9.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Potential false positives

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A MFA device may be deactivated by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. MFA device deactivations from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guide

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## Config

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

Rule query

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event.dataset:aws.cloudtrail and event.provider:iam.amazonaws.com and
event.action:(DeactivateMFADevice or DeleteVirtualMFADevice) and
event.outcome:success

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 5 (7.13.0 release)

  • Updated query, changed from:

    event.action:DeactivateMFADevice and event.dataset:aws.cloudtrail and
event.provider:iam.amazonaws.com and event.outcome:success
Version 4 (7.12.0 release)
  • Formatting only
Version 3 (7.11.2 release)
  • Formatting only
Version 2 (7.10.0 release)
  • Formatting only
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