Intrusion Prevention

Crystal.PHP.Web.Shell

Description

This indicates an attempt to use Crystal PHP Web Shell.
A web shell is a script that can be uploaded to a web server to enable remote administration of the machine. Installation of a web shell is commonly accomplished through web application vulnerabilities or configuration weaknesses.

Affected Products

Any compromised PHP servers

Impact

System Compromise: Remote attacker can gain control of vulnerable systems.

Recommended Actions

If required, the signature's action can be set to "Block".
Please use Anti-Virus software to scan and clean the system.