Web Spider 常见混淆EVAL、AA、JJ、JSFUCK

news2024/11/27 19:57:10

在这里插入图片描述

文章目录

  • 一、EVAL & constructor
  • 二、AA混淆
  • 三、JJ混淆
  • 四、JSFUCK
  • 五、针对混淆的方法
    • 简单hook
  • 总结

混淆的原理：就是把原本清晰的代码故意搞得花里胡哨，让局外人看不懂；
混淆的目的：让逆向者很难理解代码的意图，无法读懂混淆之后的代码；
一般混淆的对象为

  • 1、混淆常量的值和名称
  • 2、混淆逻辑，混淆代码的执行流程

JavaScript支持多个国家的语言

  • 1、可以使用其他国家的语言来写JS代码并且正常运行；
  • 2、可以将写好的JS代码，使用其他国家的语言进行转译后拿来运行；
  • 3、目的：是让逆向者很难理解代码的意图

一、EVAL & constructor

eval介绍：V8引擎定义的方法，具有执行JS代码的功能，一般用于隐藏真实代码，嵌套很多个eval；
案例一：eval(“function xx(){return 10} xx()”) # 可以将JS代码写成文本类型；
案例二嵌套eval：eval(“eval(‘function xx(){return 10} xx()’)”) # 一般会将文本代码进行加密；
案例二拓展：eval(atob(‘ZXZhbCgiZnVuY3Rpb24geHgoKXtyZXR1cm4gMTB9IHh4KCkiKQ==’))# 将文本代码进行base64编码；
通过constructor运行JS代：[0].constructor.constructor("return 1+3")()
通过constructor运行JS代：[0]['constructor']['constructor']("return 1+3")()

二、AA混淆

在线加密网址：https://www.sojson.com/aaencode.html
明文：var xiaozhou = "1024"
下面是AA混淆后的代码

ﾟωﾟﾉ = /｀ｍ´）ﾉ ~┻━┻   //*´∇｀sojson.com*/
['_'];
o = (ﾟｰﾟ) = _ = 3;
c = (ﾟΘﾟ) = (ﾟｰﾟ) - (ﾟｰﾟ);
(ﾟДﾟ) = (ﾟΘﾟ) = (o ^ _ ^ o) / (o ^ _ ^ o);
(ﾟДﾟ) = {
    ﾟΘﾟ: '_',
    ﾟωﾟﾉ: ((ﾟωﾟﾉ == 3) + '_')[ﾟΘﾟ],
    ﾟｰﾟﾉ: (ﾟωﾟﾉ + '_')[o ^ _ ^ o - (ﾟΘﾟ)],
    ﾟДﾟﾉ: ((ﾟｰﾟ == 3) + '_')[ﾟｰﾟ]
};
(ﾟДﾟ)[ﾟΘﾟ] = ((ﾟωﾟﾉ == 3) + '_')[c ^ _ ^ o];
(ﾟДﾟ)['c'] = ((ﾟДﾟ) + '_')[(ﾟｰﾟ) + (ﾟｰﾟ) - (ﾟΘﾟ)];
(ﾟДﾟ)['o'] = ((ﾟДﾟ) + '_')[ﾟΘﾟ];
(ﾟoﾟ) = (ﾟДﾟ)['c'] + (ﾟДﾟ)['o'] + (ﾟωﾟﾉ + '_')[ﾟΘﾟ] + ((ﾟωﾟﾉ == 3) + '_')[ﾟｰﾟ] + ((ﾟДﾟ) + '_')[(ﾟｰﾟ) + (ﾟｰﾟ)] + ((ﾟｰﾟ == 3) + '_')[ﾟΘﾟ] + ((ﾟｰﾟ == 3) + '_')[(ﾟｰﾟ) - (ﾟΘﾟ)] + (ﾟДﾟ)['c'] + ((ﾟДﾟ) + '_')[(ﾟｰﾟ) + (ﾟｰﾟ)] + (ﾟДﾟ)['o'] + ((ﾟｰﾟ == 3) + '_')[ﾟΘﾟ];
(ﾟДﾟ)['_'] = (o ^ _ ^ o)[ﾟoﾟ][ﾟoﾟ];
(ﾟεﾟ) = ((ﾟｰﾟ == 3) + '_')[ﾟΘﾟ] + (ﾟДﾟ).ﾟДﾟﾉ + ((ﾟДﾟ) + '_')[(ﾟｰﾟ) + (ﾟｰﾟ)] + ((ﾟｰﾟ == 3) + '_')[o ^ _ ^ o - ﾟΘﾟ] + ((ﾟｰﾟ == 3) + '_')[ﾟΘﾟ] + (ﾟωﾟﾉ + '_')[ﾟΘﾟ];
(ﾟｰﾟ) += (ﾟΘﾟ);
(ﾟДﾟ)[ﾟεﾟ] = '\\';
(ﾟДﾟ).ﾟΘﾟﾉ = (ﾟДﾟ + ﾟｰﾟ)[o ^ _ ^ o - (ﾟΘﾟ)];
(oﾟｰﾟo) = (ﾟωﾟﾉ + '_')[c ^ _ ^ o];
(ﾟДﾟ)[ﾟoﾟ] = '\"';
(ﾟДﾟ)['_']((ﾟДﾟ)['_'](ﾟεﾟ + (ﾟДﾟ)[ﾟoﾟ] + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((o ^ _ ^ o) + (o ^ _ ^ o)) + ((o ^ _ ^ o) + (o ^ _ ^ o)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + (ﾟｰﾟ) + (ﾟΘﾟ) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((o ^ _ ^ o) + (o ^ _ ^ o)) + ((o ^ _ ^ o) - (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟｰﾟ) + (c ^ _ ^ o) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((ﾟｰﾟ) + (o ^ _ ^ o)) + (c ^ _ ^ o) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((ﾟｰﾟ) + (ﾟΘﾟ)) + (ﾟΘﾟ) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + (ﾟｰﾟ) + (ﾟΘﾟ) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((ﾟｰﾟ) + (ﾟΘﾟ)) + ((ﾟｰﾟ) + (o ^ _ ^ o)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((ﾟｰﾟ) + (o ^ _ ^ o)) + ((o ^ _ ^ o) - (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((ﾟｰﾟ) + (ﾟΘﾟ)) + (c ^ _ ^ o) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((ﾟｰﾟ) + (ﾟΘﾟ)) + ((ﾟｰﾟ) + (o ^ _ ^ o)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟΘﾟ) + ((o ^ _ ^ o) + (o ^ _ ^ o)) + ((ﾟｰﾟ) + (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟｰﾟ) + (c ^ _ ^ o) + (ﾟДﾟ)[ﾟεﾟ] + ((ﾟｰﾟ) + (o ^ _ ^ o)) + ((ﾟｰﾟ) + (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟｰﾟ) + (c ^ _ ^ o) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟｰﾟ) + ((o ^ _ ^ o) - (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟεﾟ] + ((o ^ _ ^ o) + (o ^ _ ^ o)) + (ﾟΘﾟ) + (ﾟДﾟ)[ﾟεﾟ] + ((o ^ _ ^ o) + (o ^ _ ^ o)) + (c ^ _ ^ o) + (ﾟДﾟ)[ﾟεﾟ] + ((o ^ _ ^ o) + (o ^ _ ^ o)) + ((o ^ _ ^ o) - (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟεﾟ] + ((o ^ _ ^ o) + (o ^ _ ^ o)) + (ﾟｰﾟ) + (ﾟДﾟ)[ﾟεﾟ] + (ﾟｰﾟ) + ((o ^ _ ^ o) - (ﾟΘﾟ)) + (ﾟДﾟ)[ﾟoﾟ])(ﾟΘﾟ))((ﾟΘﾟ) + (ﾟДﾟ)[ﾟεﾟ] + ((ﾟｰﾟ) + (ﾟΘﾟ)) + (ﾟΘﾟ) + (ﾟДﾟ)[ﾟoﾟ]);

在这里插入图片描述在这里插入图片描述

三、JJ混淆

在线加密网址：https://www.sojson.com/aaencode.html
加密明文：console.log("xiaozhou")
下面是AA混淆后的代码

sojson = ~[];
/*sojson.com*/
sojson = {
    ___: ++sojson,
    /*sojson.com*/
    $$$$: (![] + "")[sojson],
    __$: ++sojson,
    $_$_: (![] + "")[sojson],
    _$_: ++sojson,
    $_$$: ({} + "")[sojson],
    $$_$: (sojson[sojson] + "")[sojson],
    _$$: ++sojson,
    $$$_: (!"" + "")[sojson],
    $__: ++sojson,
    $_$: ++sojson,
    $$__: ({} + "")[sojson],
    $$_: ++sojson,
    $$$: ++sojson,
    $___: ++sojson,
    $__$: ++sojson
};
sojson.$_ = (sojson.$_ = sojson + "")[sojson.$_$] + (sojson._$ = sojson.$_[sojson.__$]) + (sojson.$$/*sojson.com*/
= (sojson.$ + "")[sojson.__$]) + ((!sojson) + "")[sojson._$$] + (sojson.__ = sojson.$_[sojson.$$_]) + (sojson.$ = (!"" + "")[sojson.__$]) + (sojson._ = (!"" + "")[sojson._$_]) + sojson.$_[sojson.$_$] + sojson.__ + sojson._$ + sojson.$;
/*sojson.com*/
sojson.$$ = sojson.$ + (!"" + "")[sojson._$$] + sojson.__ + sojson._ + sojson.$ + sojson.$$/*sojson.com*/
;
sojson.$ = (sojson.___)[sojson.$_][sojson.$_];
sojson.$(sojson.$(sojson.$$ + "\"" + sojson.$$__ + sojson._$ + "\\" + sojson.__$ + sojson.$_$ + sojson.$$_ + "\\" + sojson.__$ + sojson.$$_ + sojson._$$ + sojson._$ + (![] + "")[sojson._$_] + sojson.$$$_ + "." + (![] + "")[sojson._$_] + sojson._$ + "\\" + sojson.__$ + sojson.$__ + sojson.$$$ + "(\\\"\\" + sojson.__$ + sojson.$$$ + sojson.___ + "\\" + sojson.__$ + sojson.$_$ + sojson.__$ + sojson.$_$_ + sojson._$ + "\\" + sojson.__$ + sojson.$$$ + sojson._$_ + "\\" + sojson.__$ + sojson.$_$ + sojson.___ + sojson._$ + sojson._ + "\\\")" + "\"")())(sojson = {
    ___: ++sojson,
    $$$$: (![] + "")[sojson]
});

在28行处拼成了console.log(“xiaozhou”)，并且调用执行；
在这里插入图片描述

四、JSFUCK

在线加密网址：https://www.sojson.com/aaencode.html
加密明文：console.log("3+3")
下面是AA混淆后的代码

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针对JSFUCK有两种方式

  • 1、使用解密工具直接解密分析
    JSFUCK解密工具：https://lelinhtinh.github.io/de4js/
    JSFUCK解密工具：http://codertab.com/JsUnFuck
    推荐资源：http://www.manongjc.com/detail/61-bbcwpooudjtlvnz.html
    在这里插入图片描述
  • 2、打断点单步调试
    在这里插入图片描述

五、针对混淆的方法

混淆提示

  • 1、点号(.)是无法混淆的；
  • 2、冒号(:)是无法混淆的；

简单hook

在控制台编写JS运行：
eval = function(){debugger;}
Function = function(){debugger;}
指定方法名进行hook：sojson.$ = function(){debugger;}
当function被调用时则会断住

  • 1、通过控制台打印arguments参数进行分析；
  • 2、通过二次断点进入function跟值进行分析；

在JJ混淆的案例基础上，进行hook扩展；
在这里插入图片描述

总结

以上就是今天要讲的内容，本文仅介绍了简单的JS混淆，后续会发布实际的案例博文，请关注我的主页；

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