夜幕-第9课练习题使用多种混淆对Javascript 代码进行保护

2025-04-20 08:19:59 +08:00 · 2022-08-30 16:17:04 +08:00 · 2022-08-30 16:17:04 +08:00 · c7c7ff133c
commit c7c7ff133c
parent ea6bb13354
2 changed files with 544 additions and 0 deletions
--- a/代码进行保护/key测试.js
+++ b/代码进行保护/key测试.js
@ -0,0 +1,240 @@
+_0x8dea = [
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+    "wqsVw6rCnMOF",
+    "wo3DrBpqPA==",
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+    "CcO9TsO5w64=",
+    "N8OqO8O5wo7ClAjDpUN4O8OQ"
+]
+
+var _0x527a = function (_0x3534de, _0x8dea7) {
+    _0x3534de = _0x3534de - 0x0;
+    var _0x527ab9 = _0x8dea[_0x3534de];
+    if (_0x527a['jQaApf'] === undefined) {
+        (function () {
+            var _0x40fe46;
+            try {
+                var _0x2b1b6d = Function('return\x20(function()\x20' + '{}.constructor(\x22return\x20this\x22)(\x20)' + ');');
+                _0x40fe46 = _0x2b1b6d();
+            } catch (_0x419bdd) {
+                _0x40fe46 = window;
+            }
+            var _0x376ef4 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+            _0x40fe46['atob'] || (_0x40fe46['atob'] = function (_0x3f6455) {
+                    var _0x4ffe5b = String(_0x3f6455)['replace'](/=+$/, '');
+                    var _0x498e90 = '';
+                    for (var _0x12ebdc = 0x0, _0x92dd35, _0xf30a7b, _0x5a2241 = 0x0; _0xf30a7b = _0x4ffe5b['charAt'](_0x5a2241++); ~_0xf30a7b && (_0x92dd35 = _0x12ebdc % 0x4 ? _0x92dd35 * 0x40 + _0xf30a7b : _0xf30a7b,
+                    _0x12ebdc++ % 0x4) ? _0x498e90 += String['fromCharCode'](0xff & _0x92dd35 >> (-0x2 * _0x12ebdc & 0x6)) : 0x0) {
+                        _0xf30a7b = _0x376ef4['indexOf'](_0xf30a7b);
+                    }
+                    return _0x498e90;
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+            var _0x50d13c = [], _0x288d35 = 0x0, _0x279a70, _0x4742a4 = '', _0x44f24b = '';
+            _0x2d4b23 = atob(_0x2d4b23);
+            for (var _0x36a341 = 0x0, _0x26eb97 = _0x2d4b23['length']; _0x36a341 < _0x26eb97; _0x36a341++) {
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+            }
+            _0x2d4b23 = decodeURIComponent(_0x44f24b);
+            var _0x1db914;
+            for (_0x1db914 = 0x0; _0x1db914 < 0x100; _0x1db914++) {
+                _0x50d13c[_0x1db914] = _0x1db914;
+            }
+            for (_0x1db914 = 0x0; _0x1db914 < 0x100; _0x1db914++) {
+                _0x288d35 = (_0x288d35 + _0x50d13c[_0x1db914] + _0x40621d['charCodeAt'](_0x1db914 % _0x40621d['length'])) % 0x100;
+                _0x279a70 = _0x50d13c[_0x1db914];
+                _0x50d13c[_0x1db914] = _0x50d13c[_0x288d35];
+                _0x50d13c[_0x288d35] = _0x279a70;
+            }
+            _0x1db914 = 0x0;
+            _0x288d35 = 0x0;
+            for (var _0x5821d7 = 0x0; _0x5821d7 < _0x2d4b23['length']; _0x5821d7++) {
+                _0x1db914 = (_0x1db914 + 0x1) % 0x100;
+                _0x288d35 = (_0x288d35 + _0x50d13c[_0x1db914]) % 0x100;
+                _0x279a70 = _0x50d13c[_0x1db914];
+                _0x50d13c[_0x1db914] = _0x50d13c[_0x288d35];
+                _0x50d13c[_0x288d35] = _0x279a70;
+                _0x4742a4 += String['fromCharCode'](_0x2d4b23['charCodeAt'](_0x5821d7) ^ _0x50d13c[(_0x50d13c[_0x1db914] + _0x50d13c[_0x288d35]) % 0x100]);
+            }
+            return _0x4742a4;
+        };
+        _0x527a['RKFJQb'] = _0x5a0787;
+        _0x527a['nARypd'] = {};
+        _0x527a['jQaApf'] = !![];
+    }
+    var _0x333a1d = _0x527a['nARypd'][_0x3534de];
+    if (_0x333a1d === undefined) {
+        if (_0x527a['iDRAGI'] === undefined) {
+            _0x527a['iDRAGI'] = !![];
+        }
+        _0x527ab9 = _0x527a['RKFJQb'](_0x527ab9, _0x8dea7);
+        _0x527a['nARypd'][_0x3534de] = _0x527ab9;
+    } else {
+        _0x527ab9 = _0x333a1d;
+    }
+    return _0x527ab9;
+};
+
+function uuid() {
+    var _0xf23abd = {
+        '\x78\x77\x51\x64\x4b': function (_0x3294c8, _0x831900) {
+            return _0x3294c8 * _0x831900;
+        },
+        '\x74\x7a\x4f\x65\x5a': function (_0x118fa7, _0x2e59cd) {
+            return _0x118fa7 & _0x2e59cd;
+        }
+    };
+    var _0x6ad99b = _0x527a('\x30\x78\x36\x35', '\x65\x4e\x23\x4b')[_0x527a('\x30\x78\x33\x30', '\x63\x6d\x75\x30')]('\x7c');
+    var _0x3c62bb = 0x0;
+    while (!![]) {
+        switch (_0x6ad99b[_0x3c62bb++]) {
+            case '\x30':
+                var _0x4972bd = _0x4b603f[_0x527a('\x30\x78\x35\x66', '\x4b\x43\x48\x63')]('');
+                continue;
+            case '\x31':
+                _0x4b603f[0xe] = '\x34';
+                continue;
+            case '\x32':
+                for (var _0x335e05 = 0x0; _0x335e05 < 0x24; _0x335e05++) {
+                    _0x4b603f[_0x335e05] = _0xebcd0a[_0x527a('\x30\x78\x35\x30', '\x31\x58\x65\x5d')](Math['\x66\x6c\x6f\x6f\x72'](_0xf23abd[_0x527a('\x30\x78\x34\x34', '\x73\x75\x43\x42')](Math[_0x527a('\x30\x78\x34\x66', '\x31\x58\x65\x5d')](), 0x10)), 0x1);
+                }
+                continue;
+            case '\x33':
+                _0x4b603f[0x8] = _0x4b603f[0xd] = _0x4b603f[0x12] = _0x4b603f[0x17] = '\x2d';
+                continue;
+            case '\x34':
+                var _0xebcd0a = _0x527a('\x30\x78\x34\x31', '\x52\x39\x66\x55');
+                continue;
+            case '\x35':
+                return _0x4972bd;
+            case '\x36':
+                var _0x4b603f = [];
+                continue;
+            case '\x37':
+                _0x4b603f[0x13] = _0xebcd0a[_0x527a('\x30\x78\x31', '\x5d\x42\x62\x71')](_0xf23abd[_0x527a('\x30\x78\x35\x36', '\x72\x4a\x24\x34')](_0x4b603f[0x13], 0x3) | 0x8, 0x1);
+                continue;
+        }
+        break;
+    }
+}
+
+uuid_res = uuid();
+
+console.log(uuid_res);
--- a/代码进行保护/readme1.md
+++ b/代码进行保护/readme1.md
@ -0,0 +1,304 @@
+在JS逆向系列课的第9课《一击即中 处理常见代码混淆的方法》中，我们见到了5种看起来很厉害的混淆字符串，也学会了如何轻松干掉它们。 那么现在，请运用你在第9课第6节中学到的知识，尝试做一下这道题吧~
+
+请问：
+
+第2个帖子（以1为起始）的HTML中id为content的部分中一共有多少个br标签？
+
+找到请求地址
+
+    https://js-crack-course-9-5.crawler-lab.com/detail/15807?key=426b51bc-97ed-48a5-85de-7aef4bc4f872&time=16786268081&sign=83aa78beb61928f703cac0e355a81b7ac6866270
+    
+请求的参数
+
+key=426b51bc-97ed-48a5-85de-7aef4bc4f872&
+time=16786268081&
+sign=83aa78beb61928f703cac0e355a81b7ac6866270
+
+打断点定位加密位置
+
+![debugger](../img/112.png)
+
+其中 _0x1753d8 是 sign 加密参数
+
+    _0x5bd2b2[_0x527a('\x30\x78\x63', '\x65\x28\x33\x4b')](md5, _0x5bd2b2['\x51\x54\x47\x49\x5a'](_0x1830f4, _0x40501b[_0x527a('\x30\x78\x31\x38', '\x56\x46\x34\x76')](_0x56ad16)) + _0x5bd2b2[_0x527a('\x30\x78\x32\x37', '\x49\x33\x59\x7a')]);
+
+改写
+
+    _0x5bd2b2["tKlYA"](md5, _0x5bd2b2['\x51\x54\x47\x49\x5a'](_0x1830f4, _0x40501b[_0x527a('\x30\x78\x31\x38', '\x56\x46\x34\x76')]("16786301071")) + "jscrackcourse95");
+
+这段代码 _0x5bd2b2["tKlYA"] 调用的是
+
+    '\x74\x4b\x6c\x59\x41': function(_0x554ec2, _0x10e10c) {
+                return _0x554ec2(_0x10e10c);
+            }
+
+改写
+    
+    md5(_0x5bd2b2['\x51\x54\x47\x49\x5a'](_0x1830f4, _0x40501b[_0x527a('\x30\x78\x31\x38', '\x56\x46\x34\x76')]("16786301071")) + "jscrackcourse95")
+    
+这段代码 _0x5bd2b2['\x51\x54\x47\x49\x5a'] 调用的是
+
+        '\x51\x54\x47\x49\x5a': function(_0x2f6f63, _0x53b774) {
+            return _0x2f6f63 + _0x53b774;
+        },
+        
+改写
+    
+    md5(_0x1830f4 + _0x40501b[_0x527a('\x30\x78\x31\x38', '\x56\x46\x34\x76')]("16786301071")) + "jscrackcourse95")
+    
+这段代码 _0x527a('\x30\x78\x31\x38', '\x56\x46\x34\x76') 调用的是 'encode'
+
+    md5(_0x1830f4 + _0x40501b['encode']("16786301071")) + "jscrackcourse95")
+    
+定位 _0x40501b 发现这事 base64
+
+![debugger](../img/113.png)
+
+接下来要解决 _0x1830f4 就是 key 的值
+
+扣代码，本着缺啥🙈补啥的原则
+
+    _0x8dea = [
+        "w5PCg8KJVcOPw7TCsn9ATU43SMKpw4kFfEwr",
+        "wqbDrcKyGcKrwqk=",
+        "wqUhX8OXfg==",
+        "C0LDh8KDwqBX",
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+        "VzTCgSYm",
+        "woUacMOM",
+        "VGQbfFXCoFU=",
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+        "wqZdwqZSw7pjLjQIwrI=",
+        "eDvCth4j",
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+        "wrDDu8Ktw6bCgw==",
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+        "w5ARDMKpw6w=",
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+        "wpN6KELDig==",
+        "CFPDrX7Dgw==",
+        "w5LCqMOxMG4=",
+        "w53CpsOzFHR8w4k=",
+        "wrpTFHzDkQ==",
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+        "w7vCvsOPJVg=",
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+        "b8OnasKYw7g=",
+        "wrJdwq5Mw5wsYiU7wrNyw5Qdw5bDlQ==",
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+        "wrVGw6xIF8OW",
+        "w5XCnMKyRcOn",
+        "wo8bd8OLfyvDgg==",
+        "D00ffsKbGzo=",
+        "Y3R6w7XDkg==",
+        "w53CocO8FVh/w4giw4HCng==",
+        "wovCpcK3wofCgQ==",
+        "w6vCrsOXDHRGw6BzXyHCgMOM",
+        "w60zDRPCuj4=",
+        "w6DCpMK+ZMO4w5zDlR9vcmsYccKOw6k7BTdYUHfCrMKrw7gDQMKeenXDisOZCcOtY8OGwoIPw5LCoEPDmW/CsMOEMEzChMOZIsK+RMO9Ykt2wopHdUgzEAdDwofCpA==",
+        "w7A2EcOB",
+        "wpvDshVsLMKQ",
+        "LsOYbMOMw6gC",
+        "wrwMw43CnMOXDcK7TMOfw7LDqA==",
+        "OsORf8OQ",
+        "egPCjxHDvA==",
+        "PMOpLMKLwrhHRQvCtxvCgGcXw7Zm",
+        "YsOuwp7DlMKt",
+        "SMOBJR4CRMOeNMOPwqo=",
+        "XgDClw/DmkjCm2lIw6g=",
+        "wopiJcKaw5FbPsK1w6o/w4ge",
+        "En1SbAbCvwjDjcOOHMOjw4nDocKDwrcSw6tRwqc=",
+        "YW5Nw44=",
+        "wo7DqcO4UcK8",
+        "w5LCpsO6",
+        "wr7DrcKsw6HChcKmWwHDmFQuw4tuwrRh",
+        "wrJLw69PMQ==",
+        "BMKlBErClA==",
+        "wqsRw4LCjMOG",
+        "w4MXC8K3",
+        "wqsVw6rCnMOF",
+        "wo3DrBpqPA==",
+        "WBrChBLDqw==",
+        "w67Cs8OWEkNcw7RiaCHClg==",
+        "CcO9TsO5w64=",
+        "N8OqO8O5wo7ClAjDpUN4O8OQ"
+    ]
+    
+    var _0x527a = function (_0x3534de, _0x8dea7) {
+        _0x3534de = _0x3534de - 0x0;
+        var _0x527ab9 = _0x8dea[_0x3534de];
+        if (_0x527a['jQaApf'] === undefined) {
+            (function () {
+                var _0x40fe46;
+                try {
+                    var _0x2b1b6d = Function('return\x20(function()\x20' + '{}.constructor(\x22return\x20this\x22)(\x20)' + ');');
+                    _0x40fe46 = _0x2b1b6d();
+                } catch (_0x419bdd) {
+                    _0x40fe46 = window;
+                }
+                var _0x376ef4 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+                _0x40fe46['atob'] || (_0x40fe46['atob'] = function (_0x3f6455) {
+                        var _0x4ffe5b = String(_0x3f6455)['replace'](/=+$/, '');
+                        var _0x498e90 = '';
+                        for (var _0x12ebdc = 0x0, _0x92dd35, _0xf30a7b, _0x5a2241 = 0x0; _0xf30a7b = _0x4ffe5b['charAt'](_0x5a2241++); ~_0xf30a7b && (_0x92dd35 = _0x12ebdc % 0x4 ? _0x92dd35 * 0x40 + _0xf30a7b : _0xf30a7b,
+                        _0x12ebdc++ % 0x4) ? _0x498e90 += String['fromCharCode'](0xff & _0x92dd35 >> (-0x2 * _0x12ebdc & 0x6)) : 0x0) {
+                            _0xf30a7b = _0x376ef4['indexOf'](_0xf30a7b);
+                        }
+                        return _0x498e90;
+                    }
+                );
+            }());
+            var _0x5a0787 = function (_0x2d4b23, _0x40621d) {
+                var _0x50d13c = [], _0x288d35 = 0x0, _0x279a70, _0x4742a4 = '', _0x44f24b = '';
+                _0x2d4b23 = atob(_0x2d4b23);
+                for (var _0x36a341 = 0x0, _0x26eb97 = _0x2d4b23['length']; _0x36a341 < _0x26eb97; _0x36a341++) {
+                    _0x44f24b += '%' + ('00' + _0x2d4b23['charCodeAt'](_0x36a341)['toString'](0x10))['slice'](-0x2);
+                }
+                _0x2d4b23 = decodeURIComponent(_0x44f24b);
+                var _0x1db914;
+                for (_0x1db914 = 0x0; _0x1db914 < 0x100; _0x1db914++) {
+                    _0x50d13c[_0x1db914] = _0x1db914;
+                }
+                for (_0x1db914 = 0x0; _0x1db914 < 0x100; _0x1db914++) {
+                    _0x288d35 = (_0x288d35 + _0x50d13c[_0x1db914] + _0x40621d['charCodeAt'](_0x1db914 % _0x40621d['length'])) % 0x100;
+                    _0x279a70 = _0x50d13c[_0x1db914];
+                    _0x50d13c[_0x1db914] = _0x50d13c[_0x288d35];
+                    _0x50d13c[_0x288d35] = _0x279a70;
+                }
+                _0x1db914 = 0x0;
+                _0x288d35 = 0x0;
+                for (var _0x5821d7 = 0x0; _0x5821d7 < _0x2d4b23['length']; _0x5821d7++) {
+                    _0x1db914 = (_0x1db914 + 0x1) % 0x100;
+                    _0x288d35 = (_0x288d35 + _0x50d13c[_0x1db914]) % 0x100;
+                    _0x279a70 = _0x50d13c[_0x1db914];
+                    _0x50d13c[_0x1db914] = _0x50d13c[_0x288d35];
+                    _0x50d13c[_0x288d35] = _0x279a70;
+                    _0x4742a4 += String['fromCharCode'](_0x2d4b23['charCodeAt'](_0x5821d7) ^ _0x50d13c[(_0x50d13c[_0x1db914] + _0x50d13c[_0x288d35]) % 0x100]);
+                }
+                return _0x4742a4;
+            };
+            _0x527a['RKFJQb'] = _0x5a0787;
+            _0x527a['nARypd'] = {};
+            _0x527a['jQaApf'] = !![];
+        }
+        var _0x333a1d = _0x527a['nARypd'][_0x3534de];
+        if (_0x333a1d === undefined) {
+            if (_0x527a['iDRAGI'] === undefined) {
+                _0x527a['iDRAGI'] = !![];
+            }
+            _0x527ab9 = _0x527a['RKFJQb'](_0x527ab9, _0x8dea7);
+            _0x527a['nARypd'][_0x3534de] = _0x527ab9;
+        } else {
+            _0x527ab9 = _0x333a1d;
+        }
+        return _0x527ab9;
+    };
+    
+    function uuid() {
+        var _0xf23abd = {
+            '\x78\x77\x51\x64\x4b': function (_0x3294c8, _0x831900) {
+                return _0x3294c8 * _0x831900;
+            },
+            '\x74\x7a\x4f\x65\x5a': function (_0x118fa7, _0x2e59cd) {
+                return _0x118fa7 & _0x2e59cd;
+            }
+        };
+        var _0x6ad99b = _0x527a('\x30\x78\x36\x35', '\x65\x4e\x23\x4b')[_0x527a('\x30\x78\x33\x30', '\x63\x6d\x75\x30')]('\x7c');
+        var _0x3c62bb = 0x0;
+        while (!![]) {
+            switch (_0x6ad99b[_0x3c62bb++]) {
+                case '\x30':
+                    var _0x4972bd = _0x4b603f[_0x527a('\x30\x78\x35\x66', '\x4b\x43\x48\x63')]('');
+                    continue;
+                case '\x31':
+                    _0x4b603f[0xe] = '\x34';
+                    continue;
+                case '\x32':
+                    for (var _0x335e05 = 0x0; _0x335e05 < 0x24; _0x335e05++) {
+                        _0x4b603f[_0x335e05] = _0xebcd0a[_0x527a('\x30\x78\x35\x30', '\x31\x58\x65\x5d')](Math['\x66\x6c\x6f\x6f\x72'](_0xf23abd[_0x527a('\x30\x78\x34\x34', '\x73\x75\x43\x42')](Math[_0x527a('\x30\x78\x34\x66', '\x31\x58\x65\x5d')](), 0x10)), 0x1);
+                    }
+                    continue;
+                case '\x33':
+                    _0x4b603f[0x8] = _0x4b603f[0xd] = _0x4b603f[0x12] = _0x4b603f[0x17] = '\x2d';
+                    continue;
+                case '\x34':
+                    var _0xebcd0a = _0x527a('\x30\x78\x34\x31', '\x52\x39\x66\x55');
+                    continue;
+                case '\x35':
+                    return _0x4972bd;
+                case '\x36':
+                    var _0x4b603f = [];
+                    continue;
+                case '\x37':
+                    _0x4b603f[0x13] = _0xebcd0a[_0x527a('\x30\x78\x31', '\x5d\x42\x62\x71')](_0xf23abd[_0x527a('\x30\x78\x35\x36', '\x72\x4a\x24\x34')](_0x4b603f[0x13], 0x3) | 0x8, 0x1);
+                    continue;
+            }
+            break;
+        }
+    }
+    
+    uuid_res = uuid();
+    
+    console.log(uuid_res);
+    
+key的结果
+
+    d305d345-465a-43ba-af70-805c7e57d9c9