Boss 检测点(浏览器环境)-浅谈

守护式等待 / 2023-07-24 / 原文

1-注意点

cookie的有效长度是145，但是不代表 145长度就可以用
cookie长度145之后，分段比较， 一般是中间一两段不同
调试的时候一定要固定 [随机数种子, 时间戳], 便于比较结果
在Boss里面注意下 window， top... ，我在环境里面有提到
检测了是否格式化
ua, canvas, location, cookie这些值替换为自己浏览器的, 有参与到加密里面，我就被坑了，有三个值对不上，最后发现是ua不一致，所以，尽量和自己的环境保持一致

bd73eGnpoFgR+NzIlAF4DFR5ICANuWGdLNCUlNSNRZy58S0JtZUUPB38nc2EjACg4Tx90dFkMFhlJemQf FS ddIwwd ODMeTB4MdXEjUH AQYRp2eDR7GQM7IBZJCl9ia0d3DSZGfSR3fGR1IT4=   正确

bd73eGnpoFgR+NzIlAF4DFR5ICANuWGdLNCUlNSNRZy58S0JtZUUPB38nc2EjACg4Tx90dFkMFhlJemQf FS ddIwwd azMeTB4MdXEjUH AQYRp2eDR7GQM7IBZJCl9ia0d3DSZGfSR3fGR1IT4=   Object.keys(window).length < 150

2- 检测点(相对比较隐晦的检测)

检测了window是否挂代理
检测了 Object.keys(window).length 是不是大于 150
OfflineAudioContext需要完善，快速定位搜1,44100,44100) 单步跟一下，把没补的地方补全，应该就可以跑通了，我是用的框架跑，对比之后发现是OfflineAudioContext没有补全
大概也许应该， OfflineAudioContext补全之后就能用了，如果没有的话，自己单步调一下吧，成品我就不发了，这个残次品应该是补了 80%了，差也差不多了

3- 固定随机数种子，时间戳

有时候function尾部的 ; 也很重要，不要忘了

Date.now = function now() { return 1661986251253 };
Date.parse = function () { return 1661986251253 };
Date.prototype.valueOf = function () { return 1661986251253 };
Date.prototype.getTime = function () { return 1661986251253 };
Date.prototype.toString = function () { return 1661986251253 };

Math.random = function random() { return 0.08636862211354912 };

4- 检测梳理

检测了 sele, top, 有大佬说在boss里面， top != window，如果相等的话，生成出来的值是错误的，我尝试了一下，确实不相等，但是相等的话也不会强校验，不知道是不是我测试的样本少了
检测了canvas, 2d 类型，有这些方法就好了，最后把浏览器生成的结果return
有一堆的Object.getOwnPropertyDescriptors 对象描述符检测，感觉这个检测不严格
然后就是常规的检测， Proxy 给window挂上代理，把常规的环境补好，cookie的长度应该就是145了
长度145之后，可以单步调试，记得取消window代理， boss有一个特点, 在代码开始之前，会有一个变量储存会走的分支，这些地方需要注意, 可以快速的跳到关键点
如：let branch = Object.keys(window).length > 150? true : false; if(branch){}else()
检测Object.keys(window).length > 150

检测parent

检测window是否挂代理

效果：

5-boss环境

Date.now = function now() { return 1661986251253 };
Date.parse = function () { return 1661986251253 };
Date.prototype.valueOf = function () { return 1661986251253 };
Date.prototype.getTime = function () { return 1661986251253 };
Date.prototype.toString = function () { return 1661986251253 };
Math.random = function random() { return 0.08636862211354912 };

; (() => {
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window =  global;



var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
function atob(input) {
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window.Path2D = Path2D;

CDATASection = function CDATASection() { };
window.safefunction(CDATASection, 'CDATASection');
window.CDATASection = CDATASection;

SVGGraphicsElement = function SVGGraphicsElement() { };
window.safefunction(SVGGraphicsElement, 'SVGGraphicsElement');
window.SVGGraphicsElement = SVGGraphicsElement;

PerformancePaintTiming = function PerformancePaintTiming() { };
window.safefunction(PerformancePaintTiming, 'PerformancePaintTiming');
window.PerformancePaintTiming = PerformancePaintTiming;

setInterval = function setInterval() { };
window.safefunction(setInterval, 'setInterval');
window.setInterval = setInterval;


window.scrollBy = function () { };
window.scrollTo = function () { };
window.alert = function () { };

localStorage = {};
window.localStorage = localStorage;
sessionStorage = {};
window.sessionStorage = sessionStorage;
window.safefunction(localStorage, 'localStorage');
history = function history() { };
window.history = history;
window.safefunction(history, 'history');

location = {
    hash: "",
    host: "www.zhipin.com",
    hostname: "www.zhipin.com",
    href: "https://www.zhipin.com/web/geek/job?query=&city=101210100&position=100101&page=2",
    origin: "https://www.zhipin.com",
    pathname: "/web/geek/job",
    port: "",
    protocol: "https:"
};
location.toString = function () { return location.href };
window.safefunction(location, 'location');
window.location = location;

onmessage = null;
window.outerHeight = 1067;
window.innerHeight = 963;
window.outerWidth = 1707;
window.innerWidth = 1707;
window.onmessage = onmessage;
window.RegExp = RegExp;
window.Date = Date;
window.Math = Math;
window.decodeURI = decodeURI;
window.length = 0;
window.scrollX = 0;
window.screenY = 0;
window.pageXOffset = 0;
window.pageYOffset = 0;
window.visualViewport = {};
window.screenX = 0;
window.screenY = 0;
window.devicePixelRatio = 1;
window.screenLeft = 0;
window.screenTop = 0;
window.defaultStatus = "";
window.styleMedia = {};
window.onsearch = null;
window.isSecureContext = true;
window.performance = {};
window.onappinstalled = null;
window.onbeforeinstallprompt = null;
window.originAgentCluster = false;
window.crypto = {};
window.indexedDB = {};
window.webkitStorageInfo = {};
window.onbeforexrselect = null;
window.webkitStorageInfo = {};
window.onbeforexrselect = null;
window.onabort = null;
window.onblur = null;
window.oncancel = null;
window.oncanplay = null;
window.oncanplaythrough = null;
window.onchange = null;
window.onclick = null;
window.onclose = null;
window.oncontextmenu = null;
window.oncuechange = null;
window.ondblclick = null;
window.ondrag = null;
window.ondragend = null;
window.ondragenter = null;
window.ondragleave = null;
window.ondragover = null;
window.ondragstart = null;
window.ondrop = null;
window.ondurationchange = null;
window.onemptied = null;
window.onended = null;
window.onerror = null;
window.onfocus = null;
window.onformdata = null;
window.oninput = null;
window.oninvalid = null;
window.onkeydown = null;
window.onkeypress = null;
window.onkeyup = null;
window.onload = null;
window.onloadeddata = null;
window.onloadedmetadata = null;
window.onloadstart = null;
window.onmousedown = null;
window.onmouseenter = null;
window.onmouseleave = null;
window.onmousemove = null;
window.onmouseout = null;
window.onmouseover = null;
window.onmouseup = null;
window.onmousewheel = null;
window.onpause = null;
window.onplay = null;
window.onplaying = null;
window.onprogress = null;
window.onratechange = null;
window.onreset = null;
window.onresize = null;
window.onscroll = null;
window.onseeked = null;
window.onseeking = null;
window.onselect = null;
window.onstalled = null;
window.onsubmit = null;
window.onsuspend = null;
window.ontimeupdate = null;
window.ontoggle = null;
window.onvolumechange = null;
window.onwaiting = null;
window.onwebkitanimationend = null;
window.onwebkitanimationiteration = null;
window.onwebkitanimationstart = null;
window.onwebkittransitionend = null;
window.onwheel = null;
window.onauxclick = null;
window.ongotpointercapture = null;
window.onlostpointercapture = null;
window.onpointerdown = null;
window.onpointermove = null;
window.onpointerup = null;
window.onpointercancel = null;
window.onpointerover = null;
window.onpointerout = null;
window.onpointerleave = null;
window.onselectstart = null;
window.onselectionchange = null;
window.onanimationend = null;
window.onanimationiteration = null;
window.onanimationstart = null;
window.ontransitionrun = null;
window.ontransitionstart = null;
window.ontransitionend = null;
window.ontransitioncancel = null;
window.onafterprint = null;
window.onafterprint = null;
window.onbeforeprint = null;
window.onbeforeunload = null;
window.onhashchange = null;
window.onlanguagechange = null;
window.onmessage = null;
window.onmessageerror = null;
window.onoffline = null;
window.ononline = null;
window.onpagehide = null;
window.onpageshow = null;
window.onpopstate = null;
window.onrejectionhandled = null;
window.onstorage = null;
window.onunhandledrejection = null;
window.onunload = null;
window.toString = function () {
    return '[object Window]'
}

delete module;
delete process;
delete __filename;
delete Buffer;
delete Thread
delete SharedArrayBuffer
delete GLOBAL
delete root
delete VMError
delete KNBCore

// 需要注意的地方
top = myproxy(window);
parent = top;
window.top = top;
window.parent = parent;

setTimeout = function setTimeout(){};