Web Reverse Shell

On a Kali distribution see

• /usr/share/webshells - Preinstalled by default on a Kali distribution.
• /usr/share/seclists/Web-Shells - The seclist (package) has mainly wordlist files but also web shells installed in /usr/share/seclists/Web-Shells. See also the SecList GitHub repository. See also this dedicated page in the Kali documenntation with with the Seclist contains.

Create your own reverse shell

Weevely

You can also create your reverse shell with the tool weevely.