IAM User added to an IAM group

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	AWS Audit Log
Detection Modules	Cloud
ATT&CK Tactic	Privilege Escalation (TA0004), Persistence (TA0003)
ATT&CK Technique	Valid Accounts: Cloud Accounts (T1078.004), Account Manipulation: Additional Cloud Roles (T1098.003)
Severity	Informational

Description

An IAM user was added to an IAM group.

Attacker's Goals

Add a user to a group to establish persistence or escalate privileges within a cloud account.

Investigative actions

• Identify the identity that executed the API call.
• Determine which IAM user was added to the group.
• Evaluate the group's permissions to determine their applicability to the IAM user.