AWS IAM Principal Enumeration

Classification:

attack

Tactic:

TA0007-discovery

Technique:

T1069-permission-groups-discovery

Overview

Goal

Detect when an attacker is enumerating IAM principals.

Strategy

This rule lets you leverage GuardDuty to detect when an attacker is enumerating IAM principals. The GuardDuty Findings which trigger this signal:

• Recon:IAMUser/NetworkPermissions
• Recon:IAMUser/ResourcePermissions
• Recon:IAMUser/UserPermissions

Triage & Response

1. Determine which user in your organization owns the API key that made this API call.
2. Contact the user to see if they intended to make this API call.
3. If the user did not make the API call:
   • Rotate the credentials.
   • Investigate if the same credentials made other unauthorized API calls.