PHP c99shell Backdoor Script Detection

High Nessus Network Monitor Plugin ID 6925

Synopsis

The remote web server may contain a PHP backdoor script.

Description

The remote web server may contain a PHP script that acts as a backdoor and provides a convenient set of tools for attacking the affected host. At least one instance of 'c99shell' (or a derivative, such as c100 or Locus7Shell) is hosted on the remote web server.

Solution

Remove any instances of the script and conduct a forensic examination to determine how it was installed as well as whether other unauthorized changes were made.

See Also

http://bartblaze.blogspot.com/2015/03/c99shell-not-dead.html

http://vil.nai.com/vil/content/v_136948.htm

http://www.nessus.org/u?12540cda

Plugin Details

Severity: High

ID: 6925

File Name: 6925.prm

Family: Backdoors

Published: 2013/07/09

Modified: 2015/06/01

Dependencies: 5565

Nessus ID: 46349

Risk Information

Risk Factor: High

Vulnerability Information

CPE: cpe:/a:php:php