Classification:

attack

Tactic:

TA0007-discovery

VIEW RULE IN DATADOG VIEW SIGNALS

Goal

Detect when a user has attempted to assume an anomalous number of unique roles.

Strategy

This rule sets a baseline for user activity for the AssumeRole API call, and enables detection of potentially anomalous activity.

An attacker may attempt this for the following reasons:

• To identify which roles the user account has access to.
• To identify what AWS services are being used internally.
• To identify third party integrations and internal software.

Triage and response

1. Investigate activity for the following ARN {{@userIdentity.arn}} using {{@userIdentity.session_name}}.
2. Review any other security signals for {{@userIdentity.arn}}.
3. If the activity is deemed malicious:
   • Rotate user credentials.
   • Determine what other API calls were made by the user.
   • Begin your organization’s incident response process and investigate.