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AWS IAM User Addition to Group

Identifies the addition of a user to a specified group in AWS Identity and Access Management (IAM). Any user added to a group automatically gains the permissions that are assigned to the group. If the target group…

Description

Identifies the addition of a user to a specified group in AWS Identity and Access Management (IAM). Any user added to a group automatically gains the permissions that are assigned to the group. If the target group carries elevated or admin privileges, this action can instantly grant high-risk permissions useful for credential misuse, lateral movement, or privilege escalation.

Detection logic

Its licence does not clear it for publishing here

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Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
event_index

Known benign triggers

  • Legitimate operations such as new user onboarding, role changes, or service account updates may trigger this event. 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 known behavior is causing false positives, it can be exempted from the rule.

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