PHP.C99Shell.

Name: Backdoor.PHP.C99Shell
Threat Level: High

Description: Backdoor.PHP.C99Shell is a malicious PHP script that allows an attacker to gain complete contol over the compromised server.
Type: TT_Backdoor
Also known as: Backdoor.PHP.C99Shell.d [Kaspersky], Mal/PHPShell-A [Sophos], PHP/BackDoor.gen [McAfee]
Threat analysis: Search ThreatExpert to view reports
Removal: This infection can be removed using Spyware Doctor.

These Trojans are usually designed to steal confidential data from your computer. This confidential information may include your bank information or your login ID or password. If your current antivirus software is not able to remove this trojan PHP.C99Shell.an your computer, change your antivirus software.

r57 shell viewer

Shell viewing script that can be used to compromise the server security by reading details that normal accounts cannot obtain such as paths and other account usernames. Such scripts are inherently harmful to protecting your server.