There are 3 repositories under shell-backdoor topic.
🎯 PHP / ASP - Shell Backdoor List 🎯
A webshell that can bypass some system security, all code has been obfuscated to bypass malware scans freely.
Server Scanner detect rootkit and backdoor
Yuki Priv8 Shell Backdoor
Mini Shell Php
it's an alpha shell that I've modified with a few extra features
Scanner Shell Backdoor