Security researchers urge AWS customers running EC2 instances based on community Amazon Machine Images (AMIs) to check for potentially malicious embedded code. An AMI is a template with a software configuration an operating system, application server, and applications needed to launch a virtual machine. Users can launch multiple instances from one AMI when they need multiple instances with the same configuration, or they can use different AMIs to launch instances when different configurations are needed. Unlike Marketplace AMIs, community AMIs are not verified by Amazon and can only be published by preapproved users.”]
Source: https://www.darkreading.com/cloud/cryptominer-found-embedded-in-aws-community-ami