Talos has identified an additional 600 or so compromised hosts which contain webshells due to adversaries compromising unpatched JBoss environments. Talos is working to notify victims of these compromised hosts so that appropriate remediation may take place. The notification email contains a link which you can use to view this information. We are sending notifications via email to all listed email addresses as we have found many organizations where the designated abuse contact email listed is no longer valid. By emailing all available contacts we maximize the chances of successful notification.”]
Source: https://blog.talosintelligence.com/2016/05/jboss-notifications.html