YAPS

YAPS is a lightweight PHP reverse shell that operates as a single file, allowing users to execute commands on remote systems through a TCP listener. It features customizable password protection, enumeration capabilities for gathering system information, and the ability to manage concurrent connections and execute PHP code remotely. Notably, it can auto-download enumeration tools, exploit known vulnerabilities like CVE-2021-4034, and send shellcode to the target host while supporting operations on both Linux and Windows in future updates.