Somebody knows a tool or service.
In General, I don't know what... Maybe formulate my question properly to Google more.
What to when the site has a virus or hacking or some crap, immediately came the email notification type you have one and that.
Clarabelle_Brown answered on July 12th 19 at 17:22
Put some chrootkit on periodic execution of tasks from sending reports by mail.
Or some samhain to monitor the file changes.
Or IDS/IPS type OSSEC or Snort, which will pour you alerts when a suspicious activity.