一、访问网站

二、寻找js

在Events.js里找到flag的字样

三、分析js

在后面找到一个解密函数mota，分析后是unicode+base64解码

function mota() {
  var a = ['\x59\x55\x64\x6b\x61\x47\x4a\x58\x56\x6a\x64\x61\x62\x46\x5a\x31\x59\x6d\x35\x73\x53\x31\x6c\x59\x57\x6d\x68\x6a\x4d\x6b\x35\x35\x59\x56\x68\x43\x4d\x45\x70\x72\x57\x6a\x46\x69\x62\x54\x55\x31\x56\x46\x52\x43\x4d\x46\x6c\x56\x59\x7a\x42\x69\x56\x31\x59\x35'];
  (function (b, e) {
    var f = function (g) {
      while (--g) {
        b['push'](b['shift']());
      }
    };
    f(++e);
  }(a, 0x198));
  var b = function (c, d) {
    c = c - 0x0;
    var e = a[c];
    if (b['CFrzVf'] === undefined) {
      (function () {
        var g;
        try {
          var i = Function('return\x20(function()\x20' + '{}.constructor(\x22return\x20this\x22)(\x20)' + ');');
          g = i();
        } catch (j) {
          g = window;
        }
        var h = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
        g['atob'] || (g['atob'] = function (k) {
          var l = String(k)['replace'](/=+$/, '');
          var m = '';
          for (var n = 0x0, o, p, q = 0x0; p = l['charAt'](q++); ~p && (o = n % 0x4 ? o * 0x40 + p : p, n++ % 0x4) ? m += String['fromCharCode'](0xff & o >> (-0x2 * n & 0x6)) : 0x0) {
            p = h['indexOf'](p);
          }
          return m;
        });
      }());
      b['fqlkGn'] = function (g) {
        var h = atob(g);
        var j = [];
        for (var k = 0x0, l = h['length']; k < l; k++) {
          j += '%' + ('00' + h['charCodeAt'](k)['toString'](0x10))['slice'](-0x2);
        }
        return decodeURIComponent(j);
      };
      b['iBPtNo'] = {};
      b['CFrzVf'] = !![];
    }
    var f = b['iBPtNo'][c];
    if (f === undefined) {
      e = b['fqlkGn'](e);
      b['iBPtNo'][c] = e;
    } else {
      e = f;
    }
    return e;
  };
  alert(atob(b('\x30\x78\x30')));
}

四、获取flag

直接在控制台调用

直接解码

总结

• js分析
• unicode+base64解码