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2022的腾讯游戏安全竞赛复盘
发表于: 2024-3-22 11:23 11568

2022的腾讯游戏安全竞赛复盘

2024-3-22 11:23
11568

复盘一下2022的腾讯游戏安全比赛。

这里有一个画了flag的小程序,可好像出了点问题,flag丢失了,需要把它找回来。

题目

找回flag样例:

要求:

评分标准:

根据提交截图和代码文档的时间作为评分依据。

先打开所给的程序,发现输出 ACE 的 LOGO 过一会后会消失。

IDA,打开找到 WinMain 函数,找到消息循环函数,分析主体逻辑

看到主体的函数

有一个初始化的操作,会分配一片可读可写可执行(#define PAGE_EXECUTE_READWRITE 0x40)内存并将代码拷贝过去,主要有 140005040140006350 两个地址的代码。

第一段拷贝完成之后可以发现它 PATCH 了函数开头的几个字节,应该是防静态分析的,而且看字节大概是 PUSH,POP 指令。

下面可以看到记录了当前的时刻,如果发现起始时刻与当前时刻超过了 4000(4000MS)那么执行下面的指令,这里根据开始的运行大概能猜测出来应该就是停止绘制的代码了。

最后调用 shellcode+0x650 的代码作为入口,下面可以尝试跟一下这个函数,这里可以采用静态修改代码为真实代码,也可以动调执行到这里的时候反编译。

直接跟到入口,可以很明显地发现函数入口往后有一段对自身的调用

看地址是 shellcode+0x420,跟过去,重建函数,是一个很标准的虚拟机流程

虚拟机的代码存在于 shellcode+0x1301 的地址,也就是第二次拷贝得到的代码。

根据自己的理解还原了一下虚拟机的流程:

而这里的 v16-v18 大概率也是 op2 和 op3 会操作到的,也算栈中的值。

这里很容易猜测 op5 和 op6 应该是绘制函数的代码。

FFFF00 刚好是黄色的代码,将取色器放置在程序上也能发现蓝色的代码是 2DDBE7,和这里的颜色代码差了一点,但是可以尝试修改一下。

CE 找到这个位置,将代码修改一下

这里我直接把它改成 000000 也就是黑色,直接跳出来。

然后执行完下面的代码,发现输出变成黑色了

那么主要肯定是要分析 shellcode+0 处的函数代码了(看不懂直接放弃)。

虽然看不懂,但是已经知道里面传的一个值是颜色了,去分析分析其他参数的含义就可以了。这里最好的一个办法应该是 hook,去打印它的参数,为了方便可以把它限时输出这点 PATCH 了。

这个直接去找到它的跳转让它永远跳转或者永远不跳转就行了,这里是改成永远跳转,90 加前面,偏移可以不用动。

写一个 DLL 去做 HOOK,主要去 HOOK shellcode,这个地址通过全局变量可以获得(2022游戏安全技术竞赛初赛.exe+0x8308)。

64 位的程序hook一般直接用 inline 或者 hotfix 或者无痕,个人感觉 hotfix 实现起来简单,但是个人更喜欢 inline hook,因为它 windows 消息的机制,会不停地打印数据,因此加全局变量限制输出前 100 次调用的结果。

注入器(基本通用的):

用于 HOOK 的 DLL:

首先是为了输出方便创建一个终端定向标准输出,然后 IO 函数就能往终端打印了。

hook 其实就是覆盖函数头,劫持到自己的函数里面,打印出参数之后把钩子去掉,恢复回原来的样子,再去正常调用,调用结束之后重新挂回钩子,要实现输出前100条的话最后不要重新挂钩子就行。

结果(PS:输出是正常的,但是我强制都改成黄色绘制了):

因为前几个参数是 __int32 类型的,所以直接换 %d 打印一下,这里放一下部分的数据:

可以发现,前两个参数应该是坐标(我猜的),但是出现了负值,也就是打印到了屏幕外面,而且都是黄色的点会出现这种情况,导致了 FLAG 打印不出来,因此尝试在 hook 层面修复这个 bug,把所有的负值翻转,但是发现并没什么用,说明bug应该不止那么简单,还得再分析分析。

首先就是想看看它一轮有多少个点,直接建个 set 去输出就行,把所有点保存下来。

DLL代码:

输出:

一共是 42 个点,而数了一下它题目给的正确的点数刚好也是42个,黄点是有 11 个, 蓝点有 31 个。

但是稍微改了一下第一个第二个参数发现点会直接消失,看样子是跟第三个第四个参数会有关系。

通过左右参数的比对观察一下,正确调用时的这些局部变量分别是多少,看看能不能找到点关系(放弃)。

还是选择自己写一个虚拟机去跑。

代码太长了不放了,可以自己去 dump,我写一下我自己的虚拟机调试流程:

运行之后发现了一点:

第三个和第四个参数分别为用 opcode==4 时候的 x 和 y 的坐标运算得到的值。

试试看利用 opcode=4 的流程能否让程序任意位置输出色块。

因为每次的这个操作数都不同,这里选取第一个错误坐标 -950 50 来绘制,利用这里的逻辑去做。

DLL代码:

注入之后,在指定的位置输出了黄色方块

说明修复思路是没有问题的,接下来可以用虚拟机流程把错误的坐标和对应的该操作数 dump 出来,hook 的时候进行替换。

后面用截图工具比了一下,发现它们水平距离都一样的,所以可以用已有的正确坐标参考,从上到下坐标分别为 50,110,170,230... 就是每隔一个查了 60 的距离,水平距离也同样是 60,那么最靠左的正确的方块是 (410,290),肉眼分析下来,最左边的坐标是 50,y 坐标因为对对齐的也是 50,所以第一个色块是完美还原的。

那么最左边 6 个就是

对角线延伸出去三个就是

最后两个补齐 FLAG是

最后的DLL:

最终结果也是完美实现了

今天试试复盘这个决赛

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这里有一个在屏幕上画flag的小程序,可好像出了点问题,flag丢失了,需要把它找回来,并尝试截图留念。

找回flag样例:

P.S.,在做复现的时候发现虚拟机无法正常绘制,且自己 Win11 的物理机运行会蓝屏,因此本次复现不含动态调试部分,一切只停留于静态分析和理论阶段,刷它指定的系统成本过高了接受不了。

IDA 打开,

sub_140001150 函数很像是注册的驱动卸载函数。

sub_140001188 函数应该就是获取了一下系统信息,没什么东西。

sub_140001414 函数往下跟到 sub_1400014A0 函数有大东西,不过这个函数不是直接调用的,像是注册了某种回调,三环程序应该是处罚这个回调的。

开头通过调用 sub_140001318 函数获得了 dwm.exeEPROCESS 结构。

对于接下来调用的函数

sub_140001000 比较像是获取指定进程的某个 DLL,具体也跟进来看看

对于这些API,网上找到了一些说法:

GetUserModuleBaseAddress(): 实现取进程中模块基址,该功能在《驱动开发:内核取应用层模块基地址》中详细介绍过原理,这段代码核心原理如下所示,此处最需要注意的是如果是32位进程则我们需要得到PPEB32 Peb32结构体,该结构体通常可以直接使用PsGetProcessWow64Process()这个内核函数获取到,而如果是64位进程则需要将寻找PEB的函数替换为PsGetProcessPeb()

这个地方也不难判断,就是获取 PEB 结构体,只不过多了一个 32 位和 64 位的判断,以 32 位的为例,中间有类似遍历链表的写法,如果找到了那么把某个结果保存到第二个参数指向的位置然后返回。

这里且当 sub_140001264(v24, "D3DCompile"); 函数是获取了某个函数的地址作为返回值出去的,随后是比较关键的点

调用了两次 ZwAllocateVirtualMemory 函数给进程申请内存,然后拷贝 shellcode 并进行了一定的异或混淆,最关键它把 D3DCompile 的地址和第二次申请内存的地址保存在第一次申请的内存后方,应该是方便 shellcode 找到虚拟代码,剩下的大概没有什么了,虽然没有运行成功大概也能猜测这个 shellcode 应该就是直接在屏幕绘制的代码了。

三环程序比较大,先用火绒剑分析一下行为,主要是排除 exe 有跟内核做直接数据交互。

然而并没有,但是发现它也打开了 D3DCompiler_47.dll,于是从这里开始交叉引用,通过DLL路径交叉是一个比较好的思路,不管动态加载或者是运行时直接导入,都是可以大概分析到主逻辑的。

里面就进行了一个 NtQuerySystemInformation,外面是创建线程调用的这个函数,这里应该是触发回调的一个函数,为了验证也是准备去调试,但是它根本不触发这个回调,如图所见。

之前配置环境的时候一直以为是虚拟机没有 dwm.exe 这个进程,结果没想到是回调没有办法调用,于是我选择自己运行一个 dwm.exe 进程(我直接拿初赛的三环程序去改名然后运行,可以在第一个函数成功被获取),然后自己写一个驱动手动调用那个回调写shellcode。

运行结果如下,用初赛的exe改名为dwm成功被这个函数获取到EProcess。

随后使用静态分析去解一下 shellcode,用下面的IDC脚本即可

解密后的 shellcode 可以被直接反编译

看起来跟初赛是差不多的,相同的配方,相同的味道。

再往下看

就连这个ACE都是一样的,这里大概是一个全新的虚拟机了。

然后本来是打算搜字节码去看看shellcode有没有写成功的,但是发现还是搜不到,突然想到好像这个回调最后会 free 这片内存,所以决定直接改 sys 去把原来的 free 给 jmp 掉(还是失败,想复现太难了 qwq)。

还是老老实实分析虚拟机代码吧,看到 unk_140004030,它被放到了 BaseAddress + 0x16E6 的位置上,这里的代码在我们看来是在 0x140005A00,而直接分析可得,代码实际在 &qword_140009600[136]=0x140009600+136*8=0x140009a40 的位置上。

然而这里没找到对应的数据,确实也不太会分析了,按理来说如果能直接调试运行到这的话是肯定可以定位shellcode找到位置dump出来的。

这里还原一下虚拟机的流程吧

对比起来这个虚拟机的流程也是更大更难去分析了,但是根据已有的资料看来,似乎出的问题与初赛一致,最好的办法就是做 hook 然后替换坐标。据说决赛是卷方法数,当然其他的方法也可以有,这里可以说一些理论可行的方案:

脑子有限,只能想那么多了,希望有时间那个旧电脑退役了刷个系统再去实现这些操作把。

#include<windows.h>
#include<iostream>
#include<time.h>
#include<stdlib.h>
#include<TlHelp32.h>
#define EXEFILEW L"2022游戏安全技术竞赛初赛.exe"
#define EXEFILE "2022游戏安全技术竞赛初赛.exe"
DWORD old;
SIZE_T written;
DWORD FindProcess() {
    HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    PROCESSENTRY32 pe32;
    pe32 = { sizeof(pe32) };
    BOOL ret = Process32First(hSnap, &pe32);
    while (ret)
    {
        if (!wcsncmp(pe32.szExeFile,  EXEFILEW, lstrlen(EXEFILEW))) {
            printf("找到程序 %s ,PID=%d\n", EXEFILE, pe32.th32ProcessID);
            return pe32.th32ProcessID;
        }
        ret = Process32Next(hSnap, &pe32);
    }
    return 0;
}
void InjectModule(DWORD ProcessId, const char* szPath)
{
    HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, ProcessId);
    printf("进程句柄:%p\n", hProcess);
    LPVOID lpAddress = VirtualAllocEx(hProcess, NULL, 0x100, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
    SIZE_T dwWriteLength = 0;
    WriteProcessMemory(hProcess, lpAddress, szPath, strlen(szPath), &dwWriteLength);
    HANDLE hThread = CreateRemoteThread(hProcess, NULL, NULL, (LPTHREAD_START_ROUTINE)LoadLibraryA, lpAddress, NULL, NULL);
    WaitForSingleObject(hThread, -1);
    VirtualFreeEx(hProcess, lpAddress, 0, MEM_RELEASE);
    CloseHandle(hProcess);
    CloseHandle(hThread);
}
int main() {
    DWORD ProcessId = FindProcess();
    while (!ProcessId) {
        printf("未找到%s程序,等待两秒中再试\n",EXEFILE);
        Sleep(2000);
        ProcessId = FindProcess();
    }
    InjectModule(ProcessId, "C:\\Users\\xia0ji233\\source\\repos\\T2022Pre\\x64\\Debug\\hack.dll");
}
#include<windows.h>
#include<iostream>
#include<time.h>
#include<stdlib.h>
#include<TlHelp32.h>
#define EXEFILEW L"2022游戏安全技术竞赛初赛.exe"
#define EXEFILE "2022游戏安全技术竞赛初赛.exe"
DWORD old;
SIZE_T written;
DWORD FindProcess() {
    HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    PROCESSENTRY32 pe32;
    pe32 = { sizeof(pe32) };
    BOOL ret = Process32First(hSnap, &pe32);
    while (ret)
    {
        if (!wcsncmp(pe32.szExeFile,  EXEFILEW, lstrlen(EXEFILEW))) {
            printf("找到程序 %s ,PID=%d\n", EXEFILE, pe32.th32ProcessID);
            return pe32.th32ProcessID;
        }
        ret = Process32Next(hSnap, &pe32);
    }
    return 0;
}
void InjectModule(DWORD ProcessId, const char* szPath)
{
    HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, ProcessId);
    printf("进程句柄:%p\n", hProcess);
    LPVOID lpAddress = VirtualAllocEx(hProcess, NULL, 0x100, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
    SIZE_T dwWriteLength = 0;
    WriteProcessMemory(hProcess, lpAddress, szPath, strlen(szPath), &dwWriteLength);
    HANDLE hThread = CreateRemoteThread(hProcess, NULL, NULL, (LPTHREAD_START_ROUTINE)LoadLibraryA, lpAddress, NULL, NULL);
    WaitForSingleObject(hThread, -1);
    VirtualFreeEx(hProcess, lpAddress, 0, MEM_RELEASE);
    CloseHandle(hProcess);
    CloseHandle(hThread);
}
int main() {
    DWORD ProcessId = FindProcess();
    while (!ProcessId) {
        printf("未找到%s程序,等待两秒中再试\n",EXEFILE);
        Sleep(2000);
        ProcessId = FindProcess();
    }
    InjectModule(ProcessId, "C:\\Users\\xia0ji233\\source\\repos\\T2022Pre\\x64\\Debug\\hack.dll");
}
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include <Windows.h>
#include <stdio.h>
#include <math.h>
typedef __int64 (*Func)(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10);
__int64 GetBaseAddr() {
    HMODULE hMode = GetModuleHandle(nullptr);
    return (__int64)hMode;
}
void* shellcode = 0;
BYTE HookCode[] = {
    0x48,0xB8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //mov rax,xxx
    0xFF,0xE0                                           //jmp rax
};
BYTE OriginCode[0x50];
size_t HookLen = 12;
__int64 times = 100;
__int64 HackShellcode(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10) {
    memcpy(shellcode, OriginCode,HookLen);              //unhook
    //
    int x = a1, y = a2;
    __int64 ret=(*(Func)shellcode)(x, y, a3, a4, 0xFFFF0000, a6, a7, a8, a9, a10);
    times--;
    if (times>0) {
        printf("call shellcode(%d,%d,%d,%d,%d,%p,%p,%p,%p,%p)\n",x, y, a3, a4, a5, a6, a7, a8, a9, a10);         
 
    }
    memcpy(shellcode, HookCode, HookLen);               //rehook
    return ret;
}
 
 
void HookShellcode() {
    __int64 base = GetBaseAddr();
    __int64 Ptr = base + 0x8308;
 
    shellcode = (void*)(*(__int64*)Ptr);
    while (!shellcode) {
        shellcode = (void*)(*(__int64*)Ptr);
        printf("Find shellcode Fail\n");
        Sleep(200);
    }
    printf("shellcode addr=%p\n", shellcode);
    memcpy(OriginCode, shellcode,HookLen);              //saved
    Func FuncPtr = HackShellcode;
    *(__int64*)(HookCode + 2) = (__int64)FuncPtr;       //construct
    memcpy(shellcode, HookCode, HookLen);               //hook
 
}
 
 
BOOL APIENTRY DllMain( HMODULE hModule,
                      DWORD  ul_reason_for_call,
                      LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
        case DLL_PROCESS_ATTACH:
            AllocConsole();
            freopen("CONOUT$", "w", stdout);
            HookShellcode();
        case DLL_THREAD_ATTACH:
        case DLL_THREAD_DETACH:
        case DLL_PROCESS_DETACH:
            break;
    }
    return TRUE;
}
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include <Windows.h>
#include <stdio.h>
#include <math.h>
typedef __int64 (*Func)(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10);
__int64 GetBaseAddr() {
    HMODULE hMode = GetModuleHandle(nullptr);
    return (__int64)hMode;
}
void* shellcode = 0;
BYTE HookCode[] = {
    0x48,0xB8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //mov rax,xxx
    0xFF,0xE0                                           //jmp rax
};
BYTE OriginCode[0x50];
size_t HookLen = 12;
__int64 times = 100;
__int64 HackShellcode(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10) {
    memcpy(shellcode, OriginCode,HookLen);              //unhook
    //
    int x = a1, y = a2;
    __int64 ret=(*(Func)shellcode)(x, y, a3, a4, 0xFFFF0000, a6, a7, a8, a9, a10);
    times--;
    if (times>0) {
        printf("call shellcode(%d,%d,%d,%d,%d,%p,%p,%p,%p,%p)\n",x, y, a3, a4, a5, a6, a7, a8, a9, a10);         
 
    }
    memcpy(shellcode, HookCode, HookLen);               //rehook
    return ret;
}
 
 
void HookShellcode() {
    __int64 base = GetBaseAddr();
    __int64 Ptr = base + 0x8308;
 
    shellcode = (void*)(*(__int64*)Ptr);
    while (!shellcode) {
        shellcode = (void*)(*(__int64*)Ptr);
        printf("Find shellcode Fail\n");
        Sleep(200);
    }
    printf("shellcode addr=%p\n", shellcode);
    memcpy(OriginCode, shellcode,HookLen);              //saved
    Func FuncPtr = HackShellcode;
    *(__int64*)(HookCode + 2) = (__int64)FuncPtr;       //construct
    memcpy(shellcode, HookCode, HookLen);               //hook
 
}
 
 
BOOL APIENTRY DllMain( HMODULE hModule,
                      DWORD  ul_reason_for_call,
                      LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
        case DLL_PROCESS_ATTACH:
            AllocConsole();
            freopen("CONOUT$", "w", stdout);
            HookShellcode();
        case DLL_THREAD_ATTACH:
        case DLL_THREAD_DETACH:
        case DLL_PROCESS_DETACH:
            break;
    }
    return TRUE;
}
shellcode addr=000001C5654B0000
call shellcode(-950,50,-14703700,1248208,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(50,-390,1822057,-1524539,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-950,170,-7425437,14227863,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(50,230,1897472,15215384,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-950,-210,3743658,7267794,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(50,350,966258,14122466,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-890,-270,463184,7666472,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(170,-270,-2474473,12856971,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-770,230,3460907,-13492529,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(110,-390,-5989351,14280177,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-830,170,-3514649,12856715,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(650,50,15384343,11002795,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(590,110,12856715,13307703,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(530,170,14096303,2054931,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(470,230,12869865,15314261,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(410,290,13085065,12188981,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(470,290,11235584,6581496,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(530,290,12847529,3263901,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(710,50,14122635,3090291,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(770,50,14265601,10052917,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(830,50,3793238,14305830,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(710,110,1253500,3434568,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(770,170,13177867,745383,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
shellcode addr=000001C5654B0000
call shellcode(-950,50,-14703700,1248208,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(50,-390,1822057,-1524539,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-950,170,-7425437,14227863,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(50,230,1897472,15215384,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-950,-210,3743658,7267794,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(50,350,966258,14122466,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-890,-270,463184,7666472,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(170,-270,-2474473,12856971,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-770,230,3460907,-13492529,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(110,-390,-5989351,14280177,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(-830,170,-3514649,12856715,ffffff00,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(650,50,15384343,11002795,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(590,110,12856715,13307703,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(530,170,14096303,2054931,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(470,230,12869865,15314261,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(410,290,13085065,12188981,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(470,290,11235584,6581496,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(530,290,12847529,3263901,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(710,50,14122635,3090291,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(770,50,14265601,10052917,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(830,50,3793238,14305830,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(710,110,1253500,3434568,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
call shellcode(770,170,13177867,745383,ff2ddbe7,000001C56640AC28,000001C5701C78B0,000001C5665CA4D8,000001C5704025C8,000001C570402D88)
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include <Windows.h>
#include <set>
#include <stdio.h>
#include <math.h>
std::set<std::pair<int, int>>s;
 
typedef __int64 (*Func)(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10);
__int64 GetBaseAddr() {
    HMODULE hMode = GetModuleHandle(nullptr);
    return (__int64)hMode;
}
void* shellcode = 0;
BYTE HookCode[] = {
    0x48,0xB8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //mov rax,xxx
    0xFF,0xE0                                           //jmp rax
};
BYTE OriginCode[0x50];
size_t HookLen = 12;
__int64 times = 100;
void printset() {
    for (auto k : s) {
        printf("(%d,%d)\n", k.first, k.second);
    }
}
__int64 HackShellcode(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10) {
    static int flag = 1;
    memcpy(shellcode, OriginCode,HookLen);              //unhook
    //
    int x = a1, y = a2;
    __int64 ret=(*(Func)shellcode)(x, y, a3, a4, a5, a6, a7, a8, a9, a10);
    times--;
    if (times>0) {
        printf("call shellcode(%d,%d,%d,%d,%x,%p,%p,%p,%p,%p)\n",x, y, a3, a4, a5, a6, a7, a8, a9, a10);         
    }
    int presize = s.size();
    s.insert({ x,y });
    if (s.size() == presize) {
        if (flag) {
            printset();
            flag = 0;
        }
    }
    memcpy(shellcode, HookCode, HookLen);               //rehook
    return ret;
}
 
 
void HookShellcode() {
    __int64 base = GetBaseAddr();
    __int64 Ptr = base + 0x8308;
     
    shellcode = (void*)(*(__int64*)Ptr);
    while (!shellcode) {
        shellcode = (void*)(*(__int64*)Ptr);
        printf("Find shellcode Fail\n");
        Sleep(200);
    }
    printf("shellcode addr=%p\n", shellcode);
    memcpy(OriginCode, shellcode,HookLen);              //saved
    Func FuncPtr = HackShellcode;
    *(__int64*)(HookCode + 2) = (__int64)FuncPtr;       //construct
    memcpy(shellcode, HookCode, HookLen);               //hook
 
}
 
 
BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
        AllocConsole();
        freopen("CONOUT$", "w", stdout);
        HookShellcode();
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include <Windows.h>
#include <set>
#include <stdio.h>
#include <math.h>
std::set<std::pair<int, int>>s;
 
typedef __int64 (*Func)(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10);
__int64 GetBaseAddr() {
    HMODULE hMode = GetModuleHandle(nullptr);
    return (__int64)hMode;
}
void* shellcode = 0;
BYTE HookCode[] = {
    0x48,0xB8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //mov rax,xxx
    0xFF,0xE0                                           //jmp rax
};
BYTE OriginCode[0x50];
size_t HookLen = 12;
__int64 times = 100;
void printset() {
    for (auto k : s) {
        printf("(%d,%d)\n", k.first, k.second);
    }
}
__int64 HackShellcode(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10) {
    static int flag = 1;
    memcpy(shellcode, OriginCode,HookLen);              //unhook
    //
    int x = a1, y = a2;
    __int64 ret=(*(Func)shellcode)(x, y, a3, a4, a5, a6, a7, a8, a9, a10);
    times--;
    if (times>0) {
        printf("call shellcode(%d,%d,%d,%d,%x,%p,%p,%p,%p,%p)\n",x, y, a3, a4, a5, a6, a7, a8, a9, a10);         
    }
    int presize = s.size();
    s.insert({ x,y });
    if (s.size() == presize) {
        if (flag) {
            printset();
            flag = 0;
        }
    }
    memcpy(shellcode, HookCode, HookLen);               //rehook
    return ret;
}
 
 
void HookShellcode() {
    __int64 base = GetBaseAddr();
    __int64 Ptr = base + 0x8308;
     
    shellcode = (void*)(*(__int64*)Ptr);
    while (!shellcode) {
        shellcode = (void*)(*(__int64*)Ptr);
        printf("Find shellcode Fail\n");
        Sleep(200);
    }
    printf("shellcode addr=%p\n", shellcode);
    memcpy(OriginCode, shellcode,HookLen);              //saved
    Func FuncPtr = HackShellcode;
    *(__int64*)(HookCode + 2) = (__int64)FuncPtr;       //construct
    memcpy(shellcode, HookCode, HookLen);               //hook
 
}
 
 
BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
        AllocConsole();
        freopen("CONOUT$", "w", stdout);
        HookShellcode();
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}
(-950,-210)
(-950,50)
(-950,170)
(-890,-270)
(-830,170)
(-770,230)
(50,-390)
(50,230)
(50,350)
(110,-390)
(170,-270)
(410,290)
(470,230)
(470,290)
(530,170)
(530,290)
(590,110)
(650,50)
(710,50)
(710,110)
(770,50)
(770,170)
(830,50)
(830,230)
(890,290)
(950,50)
(950,290)
(1010,50)
(1010,110)
(1010,290)
(1070,50)
(1070,170)
(1070,290)
(1130,50)
(1130,170)
(1130,230)
(1190,170)
(1190,290)
(1250,170)
(1250,290)
(1310,290)
(1370,290)
(-950,-210)
(-950,50)
(-950,170)
(-890,-270)
(-830,170)
(-770,230)
(50,-390)
(50,230)
(50,350)
(110,-390)
(170,-270)
(410,290)
(470,230)
(470,290)
(530,170)
(530,290)
(590,110)
(650,50)
(710,50)
(710,110)
(770,50)
(770,170)
(830,50)
(830,230)
(890,290)
(950,50)
(950,290)
(1010,50)
(1010,110)
(1010,290)
(1070,50)
(1070,170)
(1070,290)
(1130,50)
(1130,170)
(1130,230)
(1190,170)
(1190,290)
(1250,170)
(1250,290)
(1310,290)
(1370,290)
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int code[1855];     //...
int main(){
    int RIP=0;
    int reg;
    int Stack[50];
    int v13,v14;
    printf("start\n");
    memset(Stack,0,sizeof(Stack));
    Stack[8]=Stack[9]=50;//截图中忘了这一句,不要忘了加上
    while(RIP<=0x1301){
        //printf("execute opcode=%d RIP=%d\n",code[RIP],RIP);
        int opcode=code[RIP];
        RIP++;
        switch (opcode) {
 
            case 0:
                Stack[0]+=Stack[1];
                printf("stack[0]=%d+%d\n",Stack[0],Stack[1]);
                break;
            case 1:
                Stack[0]-=Stack[1];
                printf("stack[0]=%d-%d\n",Stack[0],Stack[1]);
                break;
            case 2:
                Stack[code[RIP+1]]=Stack[code[RIP]];
                printf("Stack[%d]=Stack[%d]=%d\n",code[RIP+1],code[RIP],Stack[code[RIP]]);
                RIP+=2;
                break;
            case 3:
                Stack[code[RIP+1]]=code[RIP];
                printf("Stack[%d]=%d\n",code[RIP+1],code[RIP]);
                RIP+=2;
                break;
            case 4:
                v13=Stack[0];
                v14=Stack[0]*(Stack[1]+1);
                printf("Origin: Stack[0]=%d Stack[1]=%d ",Stack[0],Stack[1]);
                Stack[0]=code[RIP]^0x414345;
                Stack[1]=((Stack[0] ^ (Stack[1] + v13)) % 256+ (((Stack[0] ^ (v13 * Stack[1])) % 256 + (((Stack[0] ^ (Stack[1] + v14)) % 256) << 8)) << 8));
                printf("Target: Stack[0]=%d Stack[1]=%d\n",Stack[0],Stack[1]);
                RIP+=1;
                break;
            case 5:
                printf("paint(%d,%d,%d,%d,0xFFFFFF00);\n",Stack[4],Stack[5],Stack[6],Stack[7]);
                break;
            case 6:
                printf("paint(%d,%d,%d,%d,0xFF2DDBE7);\n",Stack[4],Stack[5],Stack[6],Stack[7]);
                break;
            case 7:
                printf("exit\n");
                exit(0);
            default:
                exit(0);
                break;
 
        }
    }
}
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int code[1855];     //...
int main(){
    int RIP=0;
    int reg;
    int Stack[50];
    int v13,v14;
    printf("start\n");
    memset(Stack,0,sizeof(Stack));
    Stack[8]=Stack[9]=50;//截图中忘了这一句,不要忘了加上
    while(RIP<=0x1301){
        //printf("execute opcode=%d RIP=%d\n",code[RIP],RIP);
        int opcode=code[RIP];
        RIP++;
        switch (opcode) {
 
            case 0:
                Stack[0]+=Stack[1];
                printf("stack[0]=%d+%d\n",Stack[0],Stack[1]);
                break;
            case 1:
                Stack[0]-=Stack[1];
                printf("stack[0]=%d-%d\n",Stack[0],Stack[1]);
                break;
            case 2:
                Stack[code[RIP+1]]=Stack[code[RIP]];
                printf("Stack[%d]=Stack[%d]=%d\n",code[RIP+1],code[RIP],Stack[code[RIP]]);
                RIP+=2;
                break;
            case 3:
                Stack[code[RIP+1]]=code[RIP];
                printf("Stack[%d]=%d\n",code[RIP+1],code[RIP]);
                RIP+=2;
                break;
            case 4:
                v13=Stack[0];
                v14=Stack[0]*(Stack[1]+1);
                printf("Origin: Stack[0]=%d Stack[1]=%d ",Stack[0],Stack[1]);
                Stack[0]=code[RIP]^0x414345;
                Stack[1]=((Stack[0] ^ (Stack[1] + v13)) % 256+ (((Stack[0] ^ (v13 * Stack[1])) % 256 + (((Stack[0] ^ (Stack[1] + v14)) % 256) << 8)) << 8));
                printf("Target: Stack[0]=%d Stack[1]=%d\n",Stack[0],Stack[1]);
                RIP+=1;
                break;
            case 5:
                printf("paint(%d,%d,%d,%d,0xFFFFFF00);\n",Stack[4],Stack[5],Stack[6],Stack[7]);
                break;
            case 6:
                printf("paint(%d,%d,%d,%d,0xFF2DDBE7);\n",Stack[4],Stack[5],Stack[6],Stack[7]);
                break;
            case 7:
                printf("exit\n");
                exit(0);
            default:
                exit(0);
                break;
 
        }
    }
}
v13=x;
v14=x*(y+1);
a3=operand^0x414345;
a4=((x ^ (y + v13)) % 256+ (((x ^ (v13 * y)) % 256 + (((x ^ (y + v14)) % 256) << 8)) << 8));
v13=x;
v14=x*(y+1);
a3=operand^0x414345;
a4=((x ^ (y + v13)) % 256+ (((x ^ (v13 * y)) % 256 + (((x ^ (y + v14)) % 256) << 8)) << 8));
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include <Windows.h>
#include <set>
#include <stdio.h>
#include <math.h>
std::set<std::pair<int, int>>s;
 
typedef __int64 (*Func)(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10);
__int64 GetBaseAddr() {
    HMODULE hMode = GetModuleHandle(nullptr);
    return (__int64)hMode;
}
void* shellcode = 0;
BYTE HookCode[] = {
    0x48,0xB8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //mov rax,xxx
    0xFF,0xE0                                           //jmp rax
};
BYTE OriginCode[0x50];
size_t HookLen = 12;
__int64 times = 100;
void printset() {
    for (auto k : s) {
        printf("(%d,%d)\n", k.first, k.second);
    }
}
__int64 HackShellcode(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10) {
    static int flag = 1;
    memcpy(shellcode, OriginCode,HookLen);              //unhook
    //
    int x = a1, y = a2;
    int v13, v14;
    if (x == -950 && y == 50) {
        x = 50;
        y = 50;
        v13=x;
        v14=x*(y+1);
        //printf("Origin: Stack[0]=%d Stack[1]=%d ",Stack[0],Stack[1]);
        //printf("num=0x%x ",code[RIP]);
        a3=0x524895^0x414345;
        a4=(unsigned int)((a3 ^ (y + v13)) % 256
                        + (((a3 ^ (v13 * y)) % 256 + (((a3 ^ (y + v14)) % 256) << 8)) << 8));
    }
    __int64 ret=(*(Func)shellcode)(x, y, a3, a4, a5, a6, a7, a8, a9, a10);
    times--;
    if (times>0) {
        printf("call shellcode(%d,%d,%d,%d,%x) retval=%d\n",x, y, a3, a4, a5, ret);         
    }
    int presize = s.size();
    s.insert({ x,y });
    if (s.size() == presize) {
        if (flag) {
            printset();
            flag = 0;
        }
    }
    memcpy(shellcode, HookCode, HookLen);               //rehook
    return ret;
}
 
 
void HookShellcode() {
    __int64 base = GetBaseAddr();
    __int64 Ptr = base + 0x8308;
     
    shellcode = (void*)(*(__int64*)Ptr);
    while (!shellcode) {
        shellcode = (void*)(*(__int64*)Ptr);
        printf("Find shellcode Fail\n");
        Sleep(200);
    }
    printf("shellcode addr=%p\n", shellcode);
    memcpy(OriginCode, shellcode,HookLen);              //saved
    Func FuncPtr = HackShellcode;
    *(__int64*)(HookCode + 2) = (__int64)FuncPtr;       //construct
    memcpy(shellcode, HookCode, HookLen);               //hook
 
}
 
 
BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
        AllocConsole();
        freopen("CONOUT$", "w", stdout);
        HookShellcode();
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include <Windows.h>
#include <set>
#include <stdio.h>
#include <math.h>
std::set<std::pair<int, int>>s;
 
typedef __int64 (*Func)(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10);
__int64 GetBaseAddr() {
    HMODULE hMode = GetModuleHandle(nullptr);
    return (__int64)hMode;
}
void* shellcode = 0;
BYTE HookCode[] = {
    0x48,0xB8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //mov rax,xxx
    0xFF,0xE0                                           //jmp rax
};
BYTE OriginCode[0x50];
size_t HookLen = 12;
__int64 times = 100;
void printset() {
    for (auto k : s) {
        printf("(%d,%d)\n", k.first, k.second);
    }
}
__int64 HackShellcode(int a1, int a2, int a3, int a4, int a5, __int64 a6, __int64 a7, __int64 a8, __int64 a9, __int64 a10) {

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