简易版 对 JavaScript 解混淆

原始代码

_$_=["","\x77\x72\x69\x74\x65","\x6c\x65\x6e\x67\x74\x68","\x63\x68\x61\x72\x43\x6f\x64\x65\x41\x74","\x66\x72\x6f\x6d\x43\x68\x61\x72\x43\x6f\x64\x65","\x73\x75\x62\x73\x74\x72","\x40","\x65"];var a={e:function(__0,__1){var __2,__3,__4,__5=_$_[0];if(__1==0){eval(__5)}else if(__1==1){document[_$_[1]](__0)}else{for(__3=0;__3<__0[_$_[2]];__3++){if(__3!=__4){__2=__0[_$_[3]](__3);if(__2>=33&&__2<=79){__5=__5+String[_$_[4]](__2+47)}else if(__2>=80&&__2<=126){__5=__5+String[_$_[4]](__2-47)}else{__4=__3+1;if(__0[_$_[5]](__4,1)==_$_[6]){__5=__5+String[_$_[4]](__2+5)}else{__5=__5+__0[_$_[5]](__3,1)}}}}a[_$_[7]](__5,1)}}};a.e("k9E>=m\r,\n,");a.e("k9625m\r,\n,");

a.e("kE:E=6m ,k^E:E=6m\r,\n,");a.e("k^9625m\r,\n,");a.e("k7C2>6D6E ,7C2>6DA24:?8lQ_Q ,3@C56ClQ_Q ,C@HDlQ_Q ,7C2>63@C56ClQ_Qm\r,\n,");a.e("k7C2>6 ,?2>6lQ>2:?Q ,DC4lQTegTedTerTerTeuTasTeaTe`TehTecTfdTatTebTeuTesTasTeeTedTfaTedTedTasTatTebTeuTesTatTe`TfbTf_Q ,D4C@==:?8lQ2FE@Q ,?@C6D:K6lQ?@C6D:K6Qm\r,\n,");a.e("k^7C2>6D6Em\r,\n,");a.e("k^9E>=m");

预处理

js16解码
http://tool.leavesongs.com/

自动格式化
http://tool.oschina.net/codeformat/js/

格式化
https://tool.lu/js/

_$_ = ["", "write", "length", "charCodeAt", "fromCharCode", "substr", "@", "e"];
var a = {
    e: function(__0, __1) {
        var __2, __3, __4, __5 = _$_[0];

        if (__1 == 0) {
            eval(__5)
        } else if (__1 == 1) {
            document[_$_[1]](__0)
        } else {
            for (__3 = 0; __3 < __0[_$_[2]]; __3++) {
                if (__3 != __4) {
                    __2 = __0[_$_[3]](__3);
                    if (__2 >= 33 && __2 <= 79) {
                        __5 = __5 + String[_$_[4]](__2 + 47)
                    } else if (__2 >= 80 && __2 <= 126) {
                        __5 = __5 + String[_$_[4]](__2 - 47)
                    } else {
                        __4 = __3 + 1;
                        if (__0[_$_[5]](__4, 1) == _$_[6]) {
                            __5 = __5 + String[_$_[4]](__2 + 5)
                        } else {
                            __5 = __5 + __0[_$_[5]](__3, 1)
                        }
                    }
                }
            }
            a[_$_[7]](__5, 1)
        }
    }
};

a.e("k9E>=m\r,\n,");
a.e("k9625m\r,\n,");
a.e("kE:E=6m ,k^E:E=6m\r,\n,");
a.e("k^9625m\r,\n,");
a.e("k7C2>6D6E ,7C2>6DA24:?8lQ_Q ,3@C56ClQ_Q ,C@HDlQ_Q ,7C2>63@C56ClQ_Qm\r,\n,");
a.e("k7C2>6 ,?2>6lQ>2:?Q ,DC4lQTegTedTerTerTeuTasTeaTe`TehTecTfdTatTebTeuTesTasTeeTedTfaTedTedTasTatTebTeuTesTatTe`TfbTf_Q ,D4C@==:?8lQ2FE@Q ,?@C6D:K6lQ?@C6D:K6Qm\r,\n,");
a.e("k^7C2>6D6Em\r,\n,");
a.e("k^9E>=m");

结果

使用VS Code 右键替换变量名
在console中输出解密结果。

_$_ = ["", "write", "length", "charCodeAt", "fromCharCode", "substr", "@", "e"];
var a = {
    e: function(para1, para2) {
        var i_charcode, i, pre_idx, result = "";
        
        if (para2 == 0) {
            eval(result)
        } else if (para2 == 1) {
            // document["write"](para1)
            document.write(para1)
        } else {
            for (i = 0; i < para1["length"]; i++) {
                if (i != pre_idx) {
                    i_charcode = para1["charCodeAt"](i);
                    if (i_charcode >= 33 && i_charcode <= 79) {
                        result = result + String["fromCharCode"](i_charcode + 47)
                    } else if (i_charcode >= 80 && i_charcode <= 126) {
                        result = result + String["fromCharCode"](i_charcode - 47)
                    } else {
                        pre_idx = i + 1;
                        if (para1["substr"](pre_idx, 1) == "@") {
                            result = result + String["fromCharCode"](i_charcode + 5)
                        } else {
                            result = result + para1["substr"](i, 1)
                        }
                    }
                }
            }
            console.log(result)
            a["e"](result, 1)
        }
    }
};


a.e("k9E>=m\r,\n,");
a.e("k9625m\r,\n,");
a.e("kE:E=6m ,k^E:E=6m\r,\n,");
a.e("k^9625m\r,\n,");
a.e("k7C2>6D6E ,7C2>6DA24:?8lQ_Q ,3@C56ClQ_Q ,C@HDlQ_Q ,7C2>63@C56ClQ_Qm\r,\n,");
a.e("k7C2>6 ,?2>6lQ>2:?Q ,DC4lQTegTedTerTerTeuTasTeaTe`TehTecTfdTatTebTeuTesTasTeeTedTfaTedTedTasTatTebTeuTesTatTe`TfbTf_Q ,D4C@==:?8lQ2FE@Q ,?@C6D:K6lQ?@C6D:K6Qm\r,\n,");
a.e("k^7C2>6D6Em\r,\n,");
a.e("k^9E>=m");