AWS IAM Role Trust Policy Modification to External Account
Detects the creation or modification of an IAM Role trust policy that grants assume-role permissions to an AWS account that is not part of the organization. This action creates a backdoor for an external entity to gain persistent access to your environment, often used by attackers to maintain unauthorized access. This rule relies on an `aws_org_accounts.csv` lookup table to identify accounts belonging to the organization. If this lookup is not established, manual filtering of AWS accounts will be required. Service Accounts may need to be filtered.
Splunk (SPL)
