Web-Spa is a Java web knocking tool for sending a single HTTP/S request to your web server in order to authorize the execution of a premeditated operating system (O/S) command on it.
You can download it from the following link: https://packetstormsecurity.com/files/download/123700/webspa-05.zip
Source: https://packetstormsecurity.com/files/123700/Web-Spa-0.5.html

