吓一跳，还以为被挂马了！该死的115.238.20.86

晚上打开碎碎念，浏览器等了好久才开始载入页面。当时我以为是服务商的带宽问题，也没多想慢就慢吧，总比打不开强。

打开后，问题就来了，我看到在右下角弹出了一个600px的广告框，说的是某国内厂商的空调。

打开firebug进行调试，发现页面被改写成了框架结构，网站首页和广告部分用框架分离了。

松了口气，从代码的特征看，这不是挂马，而是浙江电信的广告推送干的好事。

之前抓马的时候也遇到过推送广告干扰日志的事情，但因为推送的频率不固定，往往很难收集到样本，今天居然给我遇上了，趁机分析一下。

浙江电信此次的推送广告工作方式很简单。

第一步：确保用户使用他们的dns服务器:

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202.101.172.46
202.101.172.47
202.101.172.48
202.101.172.35
当然，还有更多。

第二步：通过dns,将地址改写为你要访问的网站地址，例如访问本站就这样改写：

1	http://115.238.20.86/hangzmidea/index.html?url=http://www.alexblair.org

当然，由于js的原因，用户在地址栏上看到的还是https://www.alexblair.org

这样就造成了广告是由网站提供的，而不是电信强制推送的假象（真TMD邪恶，典型的强奸了别人还赖对方主动。）

第三步：广告必定要有统计。电信这次很聪明，不再单独使用cnzz或者yahoo这些公共统计商的服务了，而是采用北京IZP的广告发布管理系统配合cnzz来进行统计。统计代码也从js改为了image格式，这样就排除了浏览器差异化。

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<img src="http://d.izptec.com/t/count/count.com.php?website=100088&image=countlogo1.gif" alt="IZPSTAT 统计" style="border:0" />


<script src="http://s24.cnzz.com/stat.php?id=1799301&web_id=1799301&show=pic1" language="JavaScript" charset="gb2312"></script>

如果说本次广告推送仅仅是丢出一个弹框，那也太小看电信了。

接下来，如果用户点击了广告，那么就会跳转到：http://115.238.20.86/hangzmidea/clicked.htm这个页面，然后由这个页面转跳到目标客户的网页。

别小瞧了这个0.1秒的小页面。关键就在这里！

我们先看页面内容：

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< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


<img src="http://d.izptec.com/t/count/count.com.php?website=100088&image=countlogo1.gif" alt="IZPSTAT 统计" style="border:0" />



<script language="JavaScript" type="text/javascript"> var _PCSWebSite="100088"; var _PCSImage="countlogo1.gif";</script>

<script language="JavaScript" type="text/javascript" src="http://d.izptec.com/t/count/count.js" ></script>


<script language=javascript> window.location="http://www.zjmdkt.com.cn/Shownews.asp?ID=248"; </script>

<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>clicked</title></meta></head><body></body></html>

大家可以注意到这点：

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<img src="http://d.izptec.com/t/count/count.com.php?website=100088&image=countlogo1.gif" alt="IZPSTAT 统计" style="border:0" />

点击和弹窗的统计是同一个，也就是说，电信将最终用户转化数和广告曝光率混在一起统计了。果然流氓！

最后，公布一下本次拦截跳转程序的源代码：比较长，大家将就着看~

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<html>

<head>

<title>PV</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<style type="text/css">



</style>

<script language="javascript">

function QueryString(fieldName)

{

var urlString = document.location.search;

if(urlString != null)

{

var typeQu = fieldName+"=";

var urlEnd = urlString.indexOf(typeQu);

if(urlEnd != -1)

{

var paramsUrl = urlString.substring(urlEnd+typeQu.length);

var isEnd = paramsUrl.indexOf('&');

if(isEnd != -1)

{

return paramsUrl.substring(0, isEnd);

}

else

{

return paramsUrl;

}

}

else

return null;

}

else

return null;

}

var url = QueryString("url");

</script>

</meta></head>

<body onload='implement();setTimeout("hideDiv()",120000)'>

<iframe id="fulliframe" LANG="utf-8" name="fulliframe" src="" width="100%" height="100%" marginheight="0" marginwidth="0" frameborder="0"></iframe>



<script language="JavaScript" type="text/javascript">

frames['fulliframe'].location = url;

</script>





<script language="JavaScript" type="text/javascript">

var msgWinTop,msgWinLeft,msgWinWidth,msgWinHeight,mainWinHeight,mainWinWidth;

var oTimer;

var isFF = (navigator.userAgent.indexOf("Firefox")>0);

var DEFAULT_MSGTITLE = "提示";

var DEFAULT_MSGICON = "";

var DEFAULT_MSGCONTENT = "ad_con1.html";

var DEFAULT_MSGTIME =3000;

var browserName = navigator.appName;

var tipTime;

var control=false;

var cnc=true;

var cnc1=true;

var dW; // dest window object

var dWDoc; // dest window document object

function resizeMainWin()

{

if (browserName == "Microsoft Internet Explorer")

{

msgWinHeight = parseInt(dWDoc.getElementById("msgWin").offsetHeight,10);

msgWinWidth = parseInt(dWDoc.getElementById("msgWin").offsetWidth,10);

mainWinWidth = dWDoc.body.clientWidth;

mainWinHeight = dWDoc.body.clientHeight;

dWDoc.getElementById("msgWin").style.top = mainWinHeight - msgWinHeight + parseInt(dWDoc.body.scrollTop,10);

dWDoc.getElementById("msgWin").style.left = mainWinWidth - msgWinWidth + parseInt(dWDoc.body.scrollLeft,10);

}

if(browserName=="Netscape")

{

// alert("Netscape");

}

}

function moveUpMsgWin()

{

try

{

if (parseInt(dWDoc.getElementById("msgWin").style.top,10) < = (mainWinHeight - msgWinHeight + parseInt(dWDoc.body.scrollTop,10)))

{

window.clearInterval(oTimer);

oTimer = window.setTimeout("holdOnMsgWin()", tipTime);

control=true;

if (!cnc)

{

delMove();

cnc=true;

}

}

msgWinTop = parseInt(dWDoc.getElementById("msgWin").style.top,10);

dWDoc.getElementById("msgWin").style.top = msgWinTop - 2;

//inframe=setInterval("intervalframe()",10);

intervalframe();

}

catch (e)

{

/// do nothing

}

}

function moveDownMsgWin()

{

try

{

if(parseInt(dWDoc.getElementById("msgWin").style.top,10) >= (mainWinHeight + parseInt(dWDoc.body.scrollTop,10)))

{

closeMsgWin();

dWDoc.getElementById("msgWin").removeNode(true);

}

msgWinTop = parseInt(dWDoc.getElementById("msgWin").style.top,10);

dWDoc.getElementById("msgWin").style.top = msgWinTop + 2;

control=false;

}

catch (e)

{

/// do nothing

}

}

function intervalframe()

{

GetObj("msgWin").onmouseover=new Function("delMove()");

GetObj("msgWin").onmouseout=new Function("holdOnMsgWin()");

}

function holdOnMsgWin()

{

//oTimer = window.setInterval("moveDownMsgWin()",1);

}

function closeMsgWin()

{

try

{

if(oTimer)

{

window.clearInterval(oTimer);

dWDoc.body.removeChild(dWDoc.getElementById('msgWin'));

}

}

catch(e)

{

/// do nothing

}

}

function popUp(dstWin, msgTitle, msgTime)

{

try

{

var objWin = eval(dstWin);

if (isFF)

{

if (objWin.document.body==null)

{

oTimer = window.setTimeout("popUp("" + dstWin + "", "" + msgTitle + "", " + msgTime + ")", 5);

return;

}

}

else

{

if (objWin.document.readyState!="complete")

{

oTimer = window.setTimeout("popUp("" + dstWin + "", "" + msgTitle + "", " + msgTime + ")", 5);

return;

}

}

if(oTimer)

{

window.clearTimeout(oTimer);

}

dstWin = eval(dstWin);

if (dstWin==null)

{

return;

}

dW = dstWin.window;

dWDoc = dW.document;

dWDoc.body.onresize = resizeMainWin;

if (msgTitle=="")

{

tipTime = (msgTime==null)?DEFAULT_MSGTIME:msgTime;

}

var mw = dWDoc.createElement("div");

mw.id = "msgWin";

mw.style.position = "absolute";

//mw.style.visibility = "hidden";

mw.style.zIndex = "100";

mw.style.top = "0px";

mw.style.left = "0px";

mw.style.width = "260";

mw.style.height = "80px";

mw.style.filter="alpha(opacity=100)";

var ostr="<div id='sd' style='z-index:1000;margin-left:243px;margin-top:1px;position:absolute;width:17px;height:17px;'>";

ostr+="<a href='javascript: hideDiv()' title='关闭' onclick="javascript:openone()"><img src='close.gif' onmouseover=javascript:{this.src='close.gif';} onmouseout=javascript:{this.src='close.gif';} width='16px' height='16px' border='0px'/></a>";

ostr+="</div>";

ostr += "<table border=0 cellpadding=0 cellspacing=0 width='262px' height='192px'>";

ostr += "<tr>";

ostr += "<td width='262px' height='192px' align=center>";

ostr += "<iframe src="+DEFAULT_MSGCONTENT+" frameborder=0 scrolling=no width='262px' height='192px'></iframe>";

ostr += "</td>";

ostr += "</tr>";

ostr += "</table>";

mw.innerHTML = ostr;

dWDoc.body.appendChild(mw);

if (browserName == "Microsoft Internet Explorer")

{

msgWinTop = parseInt(mw.style.top,10);

msgWinLeft = parseInt(mw.style.left,10);

msgWinHeight = parseInt(mw.offsetHeight,10);

msgWinWidth = parseInt(mw.offsetWidth,10);

mainWinWidth = dWDoc.body.clientWidth;

mainWinHeight = dWDoc.body.clientHeight;

mw.style.top = parseInt(dWDoc.body.scrollTop,10) + mainWinHeight + 10;// msgWinHeight

mw.style.left = parseInt(dWDoc.body.scrollLeft,10) + mainWinWidth - msgWinWidth-20;

mw.style.visibility="visible";

beginMove();

}

if (browserName=="Netscape")

{

msgWinTop = parseInt(mw.style.top,10);

msgWinLeft = parseInt(mw.style.left,10);

msgWinHeight = parseInt(mw.offsetHeight,10)+100;

msgWinWidth = parseInt(mw.offsetWidth,10);

mainWinWidth = window.innerWidth;

mainWinHeight =window.innerHeight;

mw.style.top = document.documentElement.scrollTop + window.innerHeight-document.getElementById("msgWin").offsetHeight+"px";// msgWinHeight

mw.style.left = window.innerWidth -document.getElementById("msgWin").offsetWidth-20+"px";

mw.style.visibility="visible";

beginMove();

}

}

catch(e)

{

/// do nothing

}

}

function GetObj(objName)

{

if(document.getElementById)

{

return eval('document.getElementById("' + objName + '")');

}

else if(document.layers)

{

return eval("document.layers['" + objName +"']");

}

else

{

return eval('document.all.' + objName);

}

}

function hideDiv()

{

closemsgWin();

}

function openone()

{

window.open('clicked.htm','colortext2');

}

function delMove()

{

if(control)

{

clearInterval(oTimer);

window.clearTimeout(oTimer);

}

cnc=false;

}

function closemsgWin()

{

document.getElementById("msgWin").style.visibility="hidden";

document.getElementById("msgWin").removeNode(true);

}

var alpha_show = null;

var step = 10;

var cur_type = 100;

function hide(the_layer)

{

clearTimeout(alpha_show);

cur_type-=step;

if(cur_type<0)

{

cur_type = 0;

the_layer.filters.alpha.opacity = cur_type;

alpha_show = null;

the_layer.removeNode(true);

}

else

{

the_layer.filters.alpha.opacity = cur_type;

alpha_show = setTimeout("hide("+the_layer.id+")",100)

}

}

function beginMove()

{

if (!control)

{

oTimer=window.setInterval("moveUpMsgWin()",1);

}

}

var bubbles = 0;

function implement()

{

if (bubbles==0)

{

popUp("window", "", 3000);

bubbles = 1;

}

}

</script>


<img src="http://d.izptec.com/t/count/count.com.php?website=100088&image=countlogo1.gif" alt="IZPSTAT 统计" style="border:0" />


<script src="http://s24.cnzz.com/stat.php?id=1799301&web_id=1799301&show=pic1" language="JavaScript" charset="gb2312"></script>



</body>

</html>

吓一跳，还以为被挂马了！该死的115.238.20.86

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