Amazon EC2 is pleased to announce the release of new Amazon Machine Images (AMIs) for Microsoft Windows Server to help you meet the compliance standards of the Security Technical Implementation Guide (STIG). These AMIs are pre-configured with a number of STIG standards to help you quickly get started with your deployments while meeting STIG compliance requirements.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/09/introducing-new-amazon-ec2-windows-server-amis-for-disa-stig-compliance/