某茅台自动申购(part-1)

文章仅限于学习使用

本文目的是为本人自己写个自动申购脚本

工具=>ida, frida(未去任何特征) lsposed ,so文件arm64-v8a

抓包

MT-K:1695709652297
MT-V:939dfa68ffca7b27a8d74ef90ak
MT-Token:
User-Agent:""
MT-Device-ID:clips_KxIgEiZFcRAnE3cRJEUnQXUWJkUjQnVDdhIkESBDdQ==
MT-APP-Version:1.4.7
MT-Request-ID:4464accc-5945-4d91-a385-fdc6ca1c6bb2
MT-Network-Type:4G
MT-R:clips_OlU6TmFRag5rCXwbNAQ/Tz1SKlN8THcecBp/HGhHdw==
MT-Bundle-ID:com.xx.mall
MT-USER-TAG:0
MT-SN:clips_ehwpSC0fLBggRnJAdxYgFiAYLxl9Si5PfEl/TC0afkw=
MT-DTIME:Thu Feb 09 11:49:42 GMT+08:00 2099
MT-RS:1080*2230
MT-Lng:11111
MT-Lat:22222
BS-DVID:8_lNVOMEiEaCgDe4LbQ1qxWx2J6gvlqGYn-THKQLsXq2TMQBTkITqdTZexieOYtWQeNpnklr4kwdcAq-MVLGBBQ
MT-DOUBLE:0
MT-SIM:0
MT-ACBE:1
MT-ACB:1
MT-ACBM:0
Content-Type:application/json; charset=UTF-8
Content-Length:65
Host:app.xxx.com.cn
Connection:Keep-Alive
Accept-Encoding:gzip

可以看到很多参数都是clips_xxx的形式，那么应该是同一个函数生成的，

MT-V盲猜md5?

反检测

想掏出frida去hook时，发现还是闪退，这个应该和patch某哩frida检测差不多，先看下是哪个so在作怪

function hook_dlopen() {
    Interceptor.attach(Module.findExportByName(null, "android_dlopen_ext"),
        {
            onEnter: function (args) {
                var pathptr = args[0];
                if (pathptr !== undefined && pathptr != null) {
                    var path = ptr(pathptr).readCString();
                    console.log(path)
                }
            }
        }
    );
}

android_dlopen_ext=> libwalkstack.so
android_dlopen_ext=> libstats_jni.so
android_dlopen_ext=> /system/framework/oat/arm64/org.apache.http.legacy.odex
android_dlopen_ext=> /data/app/~~ihvoegmu2xy8soMC5G20dg==/com.xxx.mall-RW8qb9WZaGAbaHrJU9xaQQ==/oat/arm64/base.odex
android_dlopen_ext=> libframework-connectivity-jni.so
android_dlopen_ext=> libforcedarkimpl.so
android_dlopen_ext=> /data/app/~~ihvoegmu2xy8soMC5G20dg==/com.xxx.mall-RW8qb9WZaGAbaHrJU9xaQQ==/lib/arm64/libbaiduprotect.so
Process terminated

libbaiduprotect.so分析

hook下pthread_create

function hook_pthread_create() {
    var libcModule = Process.findModuleByName('libc.so');
    if (libcModule) {
        var pthread_create = new NativeFunction(
            libcModule.findExportByName('pthread_create'),
            'int', ['pointer', 'pointer', 'pointer', 'pointer']
        );
        Interceptor.attach(pthread_create, {
            onEnter: function (args) {
                var libmsaoaidsecModule = Process.findModuleByName('libbaiduprotect.so');
                if (libmsaoaidsecModule) {
                    // 在进入 pthread_create 之前
                    console.log("pthread_create called with arguments:");
                    console.log("attr:", args[0]);
                    console.log("attr:", (args[0] - libmsaoaidsecModule.base).toString(16));
                    console.log("start_routine:", args[1]);
                    console.log("arg:", args[2]);
                    console.log("function at=>0x"+(args[2] - libmsaoaidsecModule.base).toString(16));
                    console.log("pid:", args[3]);
                    console.log('----------------------------------------\n')
                }
            },
            onLeave: function (retval) {

            }
        });
    }
}
function hook_dlopen() {
    var android_dlopen_ext = Module.findExportByName(null, "android_dlopen_ext");
    Interceptor.attach(android_dlopen_ext, {
        onEnter: function (args) {
            this.call_hook = false;
            var so_name = ptr(args[0]).readCString();
            // console.log("android_dlopen_ext=>", so_name)
            if(so_name!=null){
                hook_pthread_create()
            }

        }, onLeave: function (retval) {

        }
    });
}
setImmediate(hook_dlopen);

掏出ida看一下0x4a448，满屏幕的垃圾指令，按F5无法查看伪代码，难道本文就要到此结束了吗

掏出这个，lsp注入后修复一下

https://github.com/F8LEFT/SoFixer

修复后就直接shift+f12搜索gmain

然后就非常清楚了，直接patch掉2BA40就行，直接上代码

function patch_pthread_create() {
    var pthread_create_addr = Module.findExportByName(null, "pthread_create");
    var pthread_create = new NativeFunction(pthread_create_addr, "int", ["pointer", "pointer", "pointer", "pointer"]);
    Interceptor.replace(pthread_create_addr, new NativeCallback((Thread, attr, start_routine, pid) => {
        var module = Process.findModuleByAddress(start_routine);
        var ret = 0;
        if (module) {
            var so_name = module.name
            var so_base = Module.getBaseAddress(so_name);
            var offset = start_routine - so_base;
            if (so_name.indexOf("libbaiduprotect.so") !=-1) {
                if (offset.toString(16) == "2ba40") {
                    console.log("patch at=> 0x"+offset.toString(16));
                }
                else {
                    ret = pthread_create(Thread, attr, start_routine, pid);
                }
            } else {
                ret = pthread_create(Thread, attr, start_routine, pid);
            }
        }
        return ret;
    }, "int", ["pointer", "pointer", "pointer", "pointer"]));
}
function hook_pthread_create() {
    var libcModule = Process.findModuleByName('libc.so');
    if (libcModule) {
        var pthread_create = new NativeFunction(
            libcModule.findExportByName('pthread_create'),
            'int', ['pointer', 'pointer', 'pointer', 'pointer']
        );
        Interceptor.attach(pthread_create, {
            onEnter: function (args) {
                var libmsaoaidsecModule = Process.findModuleByName('libbaiduprotect.so');
                if (libmsaoaidsecModule) {
                    // 在进入 pthread_create 之前
                    console.log("pthread_create called with arguments:");
                    console.log("attr:", args[0]);
                    console.log("attr:", (args[0] - libmsaoaidsecModule.base).toString(16));
                    console.log("start_routine:", args[1]);
                    console.log("arg:", args[2]);
                    console.log("function at=>0x"+(args[2] - libmsaoaidsecModule.base).toString(16));
                    console.log("pid:", args[3]);
                    console.log('----------------------------------------\n')
                }
            },
            onLeave: function (retval) {

            }
        });
    }
}
function hook_dlopen() {
    var android_dlopen_ext = Module.findExportByName(null, "android_dlopen_ext");
    Interceptor.attach(android_dlopen_ext, {
        onEnter: function (args) {
            this.call_hook = false;
            var so_name = ptr(args[0]).readCString();
            // console.log("android_dlopen_ext=>", so_name)
            if(so_name!=null){
                hook_pthread_create()
            }

        }, onLeave: function (retval) {

        }
    });
}
// setImmediate(hook_dlopen);
setImmediate(patch_pthread_create)

part-2部分看了一下，感觉挺繁琐的有时间再写