Using ClamAV, scan files uploaded to your application for viruses. In the event of a virus learn how to gracefully handle the infected file and notify the user. https://www.driftingruby.com/episodes/antivirus-uploads-with-clamby
I wrote a similar tool for those cases where you do file uploads directly to S3. Our S3 virus scanner can run in an EB container and scans files after they are uploaded and alerts you (over SNS) whenever a virus is detected.
Really cool! Thanks for sharing @kofno