JavaScript常用的Hook脚本

headers hook 当header中包含Authorization时，则插入断点

var code = function(){
var org = window.XMLHttpRequest.prototype.setRequestHeader;
window.XMLHttpRequest.prototype.setRequestHeader = function(key,value){
    if(key=='Authorization'){
        debugger;
    }
    return org.apply(this,arguments);
}
}
var script = document.createElement('script');
script.textContent = '(' + code + ')()';
(document.head||document.documentElement).appendChild(script);
script.parentNode.removeChild(script);

请求hook 当请求的url里包含MmEwMD时，则插入断点

var code = function(){
var open = window.XMLHttpRequest.prototype.open;
window.XMLHttpRequest.prototype.open = function (method, url, async){
    if (url.indexOf("MmEwMD")>-1){
        debugger;
    }
    return open.apply(this, arguments);
};
}
var script = document.createElement('script');
script.textContent = '(' + code + ')()';
(document.head||document.documentElement).appendChild(script);
script.parentNode.removeChild(script);

过debugger—1 constructor 构造器构造出来的

var _constructor = constructor;
Function.prototype.constructor = function(s) {
    if (s == "debugger") {
        console.log(s);
        return null;
    }
    return _constructor(s);
}

过debugger—2 eval的

(function() {
    'use strict';
    var eval_ = window.eval;
    window.eval = function(x) {
        eval_(x.replace("debugger;", "  ; "));
    }
    ;
    window.eval.toString = eval_.toString;
}
)();

JSON HOOK

var my_stringify = JSON.stringify;
JSON.stringify = function (params) {
    //这里可以添加其他逻辑比如 debugger
    console.log("json_stringify params:",params);
    return my_stringify(params);
};

var my_parse = JSON.parse;
JSON.parse = function (params) {
    //这里可以添加其他逻辑比如 debugger
    console.log("json_parse params:",params);
    return my_parse(params);
};

对象属性hook 属性自定义,hook cookie操作

(function(){
    // 严格模式，检查所有错误
    'use strict'
    // document 为要hook的对象 ,属性是cookie
    Object.defineProperty(document,'cookie',{
        // hook set方法也就是赋值的方法，get就是获取的方法
        set: function(val){
            // 这样就可以快速给下面这个代码行下断点，从而快速定位设置cookie的代码
            debugger;  // 在此处自动断下
            console.log('Hook捕获到set-cookie ->',val);
            return val;
        }
    })
})();

eval/Function

window.__cr_eval = window.eval;
var myeval = function(src) {
    // src就是eval运行后 最终返回的值
    console.log(src);
    console.log("========= eval end ===========");
    return window.__cr_eval;
}

var _myeval = myeval.bind(null);
_myeval.toString = window.__cr_eval.toString;
Object.defineProperty(window, 'eval',{value: _myeval});

window._cr_fun = window.Function
var myfun = function(){
    var args = Array.prototype.slice.call(arguments, 0, -1).join(","), src = arguments[arguments.lenght -1];
    console.log(src);
    console.log("======== Function end =============");
    return window._cr_fun.apply(this, arguments)
}

myfun.toString = function() {return window._cr_fun + ""} //小花招，这里防止代码里检测原生函数
Object.defineProperty(window, "Function",{value: myfun})

eval 取返回值

_eval = eval;
eval = (res)=>{
    res1 = res // 返回值
    return _eval(res)
}

eval(xxxxxxxxx)

websocket hook

 // 1、webcoket 一般都是json数据格式传输，那么发生之前需要JSON.stringify  
var my_stringify = JSON.stringify;
JSON.stringify = function (params) {
    //这里可以添加其他逻辑比如 debugger
    console.log("json_stringify params:",params);
    return my_stringify(params);
};

var my_parse = JSON.parse;
JSON.parse = function (params) {
    //这里可以添加其他逻辑比如 debugger
    console.log("json_parse params:",params);
    return my_parse(params);
};

// 2  webScoket 绑定在windows对象，上，根据浏览器的不同，websokcet名字可能不一样 
//chrome window.WebSocket  firfox window.MozWebSocket;
window._WebSocket = window.WebSocket;

// hook send
window._WebSocket.prototype.send = function (data) {
    console.info("Hook WebSocket", data);
    return this.send(data)
}

Object.defineProperty(window, "WebSocket",{value: WebSocket})

hook canvas (定位图片生成的地方)

(function() {
    'use strict';
    let create_element = document.createElement.bind(doument);

    document.createElement = function (_element) {
        console.log("create_element:",_element);
        if (_element === "canvas") {
            debugger;
        }
        return create_element(_element);
    }
})();

setInterval 定时器

(function() {
    setInterval_ = setInterval;
    console.log("原函数已被重命名为setInterval_")
    setInterval = function() {}
    ;
    setInterval.toString = function() {
        console.log("有函数正在检测setInterval是否被hook");
        return setInterval_.toString();
    }
    ;
}
)();

setInterval 循环清除定时器

for(var i = 0; i < 9999999; i++) window.clearInterval(i)