ASP Web Shell Detection (China Chopper)

High Nessus Network Monitor Plugin ID 9489

Synopsis

PVS detected suspicious Command and Control (CnC) activity.

Description

PVS detected suspicious activity that indicates a remote client interacting and issuing commands on the server via a remote web shell. Once uploaded, an attacker can use other techniques to escalate privileges and issue commands remotely. The remote commands issued have the same privilege and functionality available to the web server and may include the ability to add or delete files, run shell commands, and execute additional exploitation methods.

Solution

Search for ASP scripts containing the 'eval()' function and conduct a forensic examination to determine how the vulnerable ASP payload was installed on the server. Also, check for any additional unauthorized changes.

See Also

http://www.nessus.org/u?f8f16a4c

http://www.nessus.org/u?6ced9fad

http://www.nessus.org/u?91bfe369

Plugin Details

Severity: High

ID: 9489

Family: Backdoors

Published: 2016/09/02

Modified: 2016/09/02

Dependencies: 5696, 6244

Risk Information

Risk Factor: High