Gecko Backdoor is a most powerful web php backdoor.

Bypass 403
Bypass 404
Bypass 500
Bypass litespeed
Bypass blankphp
Bypass downloaded
Features:
Linux Exploit Suggester
Backdoor Destroyer
Auto Root > Pwnkit
Lock File
Lock Shell
Add UserName > ROOT EDITION
Add UNLOCK SHELL
Add Backconnect
Add Hash identifier
Add adminer
Add Cpanel RESET
WordPress add admin user