T1505.003 Web Shell

Adversaries may backdoor web servers with web shells to establish persistent access to systems. A Web shell is a Web script that is placed on an openly accessible Web server to allow an adversary to use the Web server as a gateway into a network. A Web shell may provide a set of functions to execute or a command-line interface on the system that hosts the Web server.

In addition to a server-side script, a Web shell may have a client interface program that is used to talk to the Web server (ex: China Chopper Web shell client).(Citation: Lee 2013)

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VERIS Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
action.hacking.variety.Use of backdoor or C2 Use of Backdoor or C2 channel related-to T1505.003 Server Software Component: Web Shell
action.hacking.vector.Backdoor or C2 Backdoor or command and control channel related-to T1505.003 Server Software Component: Web Shell
action.malware.variety.Backdoor Backdoor (enable remote access). Child of 'RAT' when combined with 'Trojan' related-to T1505.003 Server Software Component: Web Shell