AWS IAM User Addition to Groupedit

Identifies the addition of a user to a specific group in AWS Identity and Access Management (IAM).

Rule type: query

Rule indices:

  • filebeat-*
  • logs-aws*

Severity: low

Risk score: 21

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
  • Identity and Access

Version: 2 (version history)

Added (Elastic Stack release): 7.9.0

Last modified (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Potential false positivesedit

Adding users to a specific group may be done by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. User additions from unfamiliar users or hosts should be investigated. If a known behavior is causing false positives, it can be excluded from the rule.

Investigation guideedit

The AWS Filebeat module must be enabled to use this rule.

Rule queryedit

event.action:AddUserToGroup and event.dataset:aws.cloudtrail and
event.provider:iam.amazonaws.com and event.outcome:success

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 2 (7.10.0 release)
  • Formatting only