Finding AWS keys across regions and accounts at the org level.

Question

Suppose a customer has multiple AWS accounts, and their keys are sprawling across multiple regions and he wants to provide an org level service account credentials which has access to AWS KMS for all regions and accounts. 
Can we discover all AWS keys across regions and accounts at the org level using the single parent credential?

Answer

UPDATE - specifically regarding KMS Keys - there is no ability to use the kms:ListKeys action from another AWS Account. I'm not aware of anything similar to the IAM credential report for KMS.

The following helps with IAM credentials:

You can generate a credential report for a single AWS account which will list out all credentials in a specific account: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_getting-report.html

To do this at scale we have a blog post with corresponding templates to generate this across all your accounts: https://aws.amazon.com/blogs/infrastructure-and-automation/automate-iam-credential-reports-at-scale-across-aws/

This will also include details of when a key was last used – you’re likely also interested in where it was last used. Querying CloudTrail with Athena is a good next step for digging deeper: https://aws.amazon.com/premiumsupport/knowledge-center/athena-tables-search-cloudtrail-logs/

Finding AWS keys across regions and accounts at the org level.

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