App Service has added support for anti-virus scans which can send logs to Storage account, Log Analytics, and Event Hubs for better application monitoring.
The new log support, available in Diagnostic settings as "AppServiceAntiVirusScanLogs" helps you better monitor the site content of your web app. This anti-virus log uses Microsoft Defender to scan the site contents and will provide you the results of the scan. Should there be any infected files detected, the log will provide a list of those files as well.
This logging feature will be available for both Windows and Linux based web apps using our Premium and Isolated App Service plans.
Learn more.