Web Spider 常见混淆EVAL、AA、JJ、JSFUCK

文章目录

• 一、资源推荐
• 二、EVAL & constructor
• 三、AA混淆
• 四、JJ混淆
• 五、JSFUCK
• 六、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、资源推荐

        Web Spider案例 AAEncode加密 练习：https://blog.csdn.net/EXIxiaozhou/article/details/129304630

        Web Spider案例 JJEncode加密 练习：https://blog.csdn.net/EXIxiaozhou/article/details/129256968

        Web Spider案例 JSFuck加密 练习：https://blog.csdn.net/EXIxiaozhou/article/details/129315912

        二、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")()

        三、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]);

        四、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；

        五、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

        • 2、打断点单步调试

          六、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；

              总结