C/C++ Inline Hook 钩子编写技巧

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2023-02-12
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Hook 技术通常被称为钩子技术，Hook技术是Windows系统用于替代中断机制的具体实现，钩子的含义就是在程序还没有调用系统函数之前，钩子捕获调用消息并获得控制权，在执行系统调用之前执行自身程序，简单来说就是函数劫持，本笔记将具体介绍应用层Hook的实现机制。

X86 手动完成 HOOK

首先我们来实现一个小功能，这里有一个小程序，当我们点击弹窗时会自动的弹出一个MessageBox提示，我们的目标是通过注入DLL的方式Hook来实现去除这个弹窗，先来看一下Hook的思路：

1.调用 GetModuleHandle 来获取到模块的基址(user32.dll) 2.调用 GetProcAddress 获取到MessageBoxA弹窗的基址 3.调用 VirtualProtect 来修改MsgBox前5个字节内存属性 4.计算 Dest - MsgBox - 5 重定位跳转地址，并Jmp跳转 5.计算 Dest + Offset + 5 = MsgBox +5 跳转回来的位置

1.首先我们载入这个程序，输入MessageBoxA 找到我们需要Hook的地方，如下我们只需要在函数开头写入【jmp xxxx】该指令占用5字节，我们还需要记下被覆盖的这三条指令，在我们自己的中转函数中补齐它否则会导致堆栈不平衡。

img

我们还需要计算出程序的返回地址，只需要用【772A1f8A - 772A1F70 = 1A】返回地址就是基址加上1A

img

直接附上代码：

#include <Windows.h>
#include <stdio.h>

DWORD jump = 0;

__declspec(naked) void Transfer(){
	__asm{
		mov edi, edi
		push ebp
		mov ebp, esp
		mov ebx, jump
		jmp ebx
	}
}

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	HMODULE hwnd = GetModuleHandle(TEXT("user32.dll"));
	DWORD base = (DWORD)GetProcAddress(hwnd, "MessageBoxA");
	DWORD oldProtect = 0;

	if (VirtualProtect((LPVOID)base, 5, PAGE_EXECUTE_READWRITE, &oldProtect))
	{
		DWORD value = (DWORD)Transfer - base - 5;
		jump = base + 0x1a;
		__asm{
			mov eax, base
			mov byte ptr[eax], 0xe9
			inc eax
			mov ebx, value
			mov dword ptr[eax], ebx
		}
		VirtualProtect((LPVOID)base, 5, oldProtect, &oldProtect);
	}
	return true;
}

编译上方代码，然后使用注入工具注入到程序中，当我们点击弹窗时，已经Hook成功。

Hook改标题： 通常情况下，程序设置标题会调用 SetWindowTextA 这个API函数，我们可以拦截这个函数，并传进不同的窗口名称，从而实现修改指定窗口的标题，其实先代码只是在上面代码的基础上稍微改一下就能实现效果。

#include <Windows.h>
#include <stdio.h>

DWORD jump = 0;

__declspec(naked) bool _stdcall Transfer(HWND hwnd, LPCSTR lpString){
	__asm{
		mov edi, edi
		push ebp
		mov ebp, esp
		mov ebx, jump
		jmp ebx
	}
}
bool __stdcall MySetWindowTextA(HWND hwnd, LPCSTR lpString){
	char * lpText = "LyShark 破解版";
	return Transfer(hwnd, lpText);
}

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	HMODULE hwnd = GetModuleHandle(TEXT("user32.dll"));
	DWORD base = (DWORD)GetProcAddress(hwnd, "SetWindowTextA");
	DWORD oldProtect = 0;

	if (VirtualProtect((LPVOID)base, 5, PAGE_EXECUTE_READWRITE, &oldProtect))
	{
		DWORD value = (DWORD)MySetWindowTextA - base - 5;
		jump = base + 5;
		__asm{
			mov eax, base
			mov byte ptr[eax], 0xe9
			inc eax
			mov ebx, value
			mov dword ptr[eax], ebx
		}
		VirtualProtect((LPVOID)base, 5, oldProtect, &oldProtect);
	}
	return true;
}

X64 手动完成 Hook

64位与32位系统之间无论从寻址方式，还是语法规则都与x86架构有着本质的不同，所以上面的使用技巧只适用于32位程序，注入32位进程使用，下面的内容则是64位下手动完成hook挂钩的一些骚操作，由于64位编译器无法直接内嵌汇编代码，导致我们只能调用C库函数来实现Hook的中转。

简单的HookAPI例子：

#include <stdio.h>
#include <Windows.h>

#define HOOK_LEN 0xC
void HookMessageBox();
BYTE Ori_Code[HOOK_LEN] = { 0x00 };
BYTE HookCode[HOOK_LEN] = { 0x48, 0xB8, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0xFF, 0xE0 };
/*
MOV RAX, 0x9090909090909090
JMP RAX
*/
static int (WINAPI *OldMessageBoxW)(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType) = MessageBoxW;
int WINAPI MyMessageBoxW(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType)
{
	memcpy(OldMessageBoxW, &Ori_Code, sizeof(HookCode));                       // 恢复hook原始代码
	int ret = OldMessageBoxW(hWnd, TEXT("hello lyshark"), lpCaption, uType);   // 调用原函数
	HookMessageBox();                                                          // 继续hook
	return ret;
}
VOID HookMessageBox()
{
	DWORD OldProtect;
	if (VirtualProtect(OldMessageBoxW, HOOK_LEN, PAGE_EXECUTE_READWRITE, &OldProtect))
	{
		memcpy(Ori_Code, OldMessageBoxW, HOOK_LEN);         // 拷贝原始机器码指令
		*(PINT64)(HookCode + 2) = (INT64)&MyMessageBoxW;    // 填充90为指定跳转地址
	}
	memcpy(OldMessageBoxW, &HookCode, sizeof(HookCode));    // 拷贝Hook机器指令
}
int main()
{
	HookMessageBox();
	MessageBoxW(NULL, TEXT("hello"), TEXT("标题"), MB_OK);
	return 0;
}

应用于DLL注入的Hook

#include <stdio.h>
#include <Windows.h>

BYTE OldCode[12] = { 0x00 };
BYTE HookCode[12] = { 0x48, 0xB8, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0xFF, 0xE0 };
DWORD_PTR base;

int WINAPI MyMessageBoxW(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType)
{
	return 1;
}

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	HMODULE hwnd = GetModuleHandle(TEXT("user32.dll"));
	DWORD_PTR base = (DWORD_PTR)GetProcAddress(hwnd, "MessageBoxW");
	DWORD OldProtect;

	if (VirtualProtect((LPVOID)base, 12, PAGE_EXECUTE_READWRITE, &OldProtect))
	{
		memcpy(OldCode, (LPVOID)base, 12);                  // 拷贝原始机器码指令
		*(PINT64)(HookCode + 2) = (INT64)&MyMessageBoxW;    // 填充90为指定跳转地址
	}
	memcpy((LPVOID)base, &HookCode, sizeof(HookCode));      // 拷贝Hook机器指令
	return true;
}

完善这个Hook代码： 经过本人的不断尝试，最终写出了完整的注入代码，不容易啊，苍天鸭！

// By: lyshark
// http://blib.cn
#include <stdio.h>
#include <Windows.h>

BYTE OldCode[12] = { 0x00 };
BYTE HookCode[12] = { 0x48, 0xB8, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0xFF, 0xE0 };

void HookFunction64(LPCWSTR lpModule, LPCSTR lpFuncName, LPVOID lpFunction)
{
	DWORD_PTR FuncAddress = (UINT64)GetProcAddress(GetModuleHandle(lpModule), lpFuncName);
	DWORD OldProtect = 0;

	if (VirtualProtect((LPVOID)FuncAddress, 12, PAGE_EXECUTE_READWRITE, &OldProtect))
	{
		memcpy(OldCode, (LPVOID)FuncAddress, 12);                   // 拷贝原始机器码指令
		*(PINT64)(HookCode + 2) = (UINT64)lpFunction;               // 填充90为指定跳转地址
	}
	memcpy((LPVOID)FuncAddress, &HookCode, sizeof(HookCode));       // 拷贝Hook机器指令
	VirtualProtect((LPVOID)FuncAddress, 12, OldProtect, &OldProtect);
}
void UnHookFunction64(LPCWSTR lpModule, LPCSTR lpFuncName)
{
	DWORD OldProtect = 0;
	UINT64 FuncAddress = (UINT64)GetProcAddress(GetModuleHandle(lpModule), lpFuncName);
	if (VirtualProtect((LPVOID)FuncAddress, 12, PAGE_EXECUTE_READWRITE, &OldProtect))
	{
		memcpy((LPVOID)FuncAddress, OldCode, sizeof(OldCode));
	}
	VirtualProtect((LPVOID)FuncAddress, 12, OldProtect, &OldProtect);
}

int WINAPI MyMessageBoxW(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType)
{
	UnHookFunction64(L"user32.dll", "MessageBoxW");
	int ret = MessageBoxW(0, L"hello lyshark", lpCaption, uType);
	HookFunction64(L"user32.dll", "MessageBoxW", (PROC)MyMessageBoxW);
	return ret;
}
bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	switch (dword)
	{
	case DLL_PROCESS_ATTACH:
		HookFunction64(L"user32.dll", "MessageBoxW", (PROC)MyMessageBoxW);
		break;
	case DLL_PROCESS_DETACH:
	case DLL_THREAD_DETACH:
		break;
	}
	return true;
}

Detours 库的使用（32位）

前面的内容我们是自己实现的Hook代码，在生产环境中一般都会使用Hook库，常用的Hook库有免费开源的MinHook和商业的Detours Hook 这里我就默认使用Detours来测试32位下的Hook挂钩，Detours的64位是商业版，这里我们只用他的32位。

Detours 库在4.x开始就已经基于MIT许可开源了，GitHub地址： https://github.com/Microsoft/Detours

首先在Git上下载，下载好以后直接解压到指定磁盘，然后使用VS的命令行工具并进入Detours目录，直接数据命令 nmak 等待编译完成，然后配置VS项目，在【调试】->【属性】->【VC目录】将include和lib目录包含到项目中。

img

修改弹窗： 实现Hook MsgBox弹窗，该库的原理与我们上面手动实现的方式是相同的，不过它这个库更加的健壮。

#include <Windows.h>
#include <detours.h>
#pragma comment(lib,"detours.lib")

static int(WINAPI *OldMessageBoxA)(HWND, LPCSTR, LPCSTR, UINT) = MessageBoxA;

int WINAPI MyMessageBoxA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)
{
	return OldMessageBoxA(hWnd, TEXT("hello lyshark"), lpCaption, uType);
}

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	int Error = DetourTransactionBegin();
	if (Error == NO_ERROR)
	{
		DetourUpdateThread(GetCurrentThread());                 // 执行线程准备
		DetourAttach(&(PVOID&)OldMessageBoxA, MyMessageBoxA);   // 挂钩
		DetourTransactionCommit();
	}
	return true;
}

简单实现修改标题： 修改窗体标题，也可以使用这个库，代码非常简洁，如下：

#include <Windows.h>
#include <detours.h>
#include <stdio.h>
#pragma comment(lib,"detours.lib")

static BOOL(WINAPI* Old_SetWindowTextA)(HWND hWnd, LPCSTR lpString) = SetWindowTextA;

BOOL WINAPI MySetWindowTextA(HWND hWnd, LPCSTR lpString){
	return Old_SetWindowTextA(hWnd, "已破解");
}

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	int Error = DetourTransactionBegin(); 
	if (Error == NO_ERROR)
	{
		DetourUpdateThread(GetCurrentThread());
		DetourAttach(&(PVOID&)Old_SetWindowTextA, MySetWindowTextA);
		DetourTransactionCommit();
	}
	return true;
}

实现拦截文件创建： 文件的创建离不开CreateFileA函数，我们可以Hook这个函数，来拦截程序创建文件，此方法可用于对抗恶意代码，一些杀软也会通过Hook的方式监控文件的创建。

#include <Windows.h>
#include <detours.h>
#include <stdio.h>
#pragma comment(lib,"detours.lib")

static HANDLE(WINAPI* Old_CreateFileA)(LPCSTR lpFileName, DWORD dwDesiredAccess, 
	DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes, 
	DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, 
	HANDLE hTemplateFile) = CreateFileA;

HANDLE WINAPI MyCreateFileA(LPCSTR lpFileName, DWORD dwDesiredAccess,
	DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes,
	DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes,
	HANDLE hTemplateFile)
{
	char *temp = "c://test.txt";
	if (strcmp(lpFileName, temp)){
		MessageBoxA(0, TEXT("拦截到创建文件请求"), 0, 0);
		lpFileName = "";
		return Old_CreateFileA(lpFileName, dwDesiredAccess,dwShareMode, lpSecurityAttributes,
			dwCreationDisposition, dwFlagsAndAttributes,hTemplateFile);
	}
	return Old_CreateFileA(lpFileName, dwDesiredAccess,
		dwShareMode, lpSecurityAttributes,
		dwCreationDisposition, dwFlagsAndAttributes,hTemplateFile);
}
bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	int Error = DetourTransactionBegin();
	if (Error == NO_ERROR)
	{
		DetourUpdateThread(GetCurrentThread());
		DetourAttach(&(PVOID&)Old_CreateFileA, MyCreateFileA);
		DetourTransactionCommit();
	}
	return true;
}

实现Hook多个API：

#include <Windows.h>
#include <detours.h>
#include <stdio.h>
#pragma comment(lib,"detours.lib")

static BOOL(WINAPI* Old_SetWindowTextA)(HWND hWnd, LPCSTR lpString) = SetWindowTextA;
static int(WINAPI* Old_MessageBoxA)(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)=MessageBoxA;

BOOL WINAPI MySetWindowTextA(HWND hWnd, LPCSTR lpString){
	return Old_SetWindowTextA(hWnd, "已破解");
}
int WINAPI MyMessageBoxA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)
{
	return Old_MessageBoxA(hWnd, TEXT("弹窗已被重定向"), lpCaption, uType);
}
bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	int Error = DetourTransactionBegin();
	if (Error == NO_ERROR)
	{
		DetourUpdateThread(GetCurrentThread());
		DetourAttach(&(PVOID&)Old_SetWindowTextA, MySetWindowTextA);
		DetourAttach(&(PVOID&)Old_MessageBoxA, MyMessageBoxA);
		DetourTransactionCommit();
	}
	return true;
}

获取程序OEP：

#include <Windows.h>
#include <detours.h>
#pragma comment(lib,"detours.lib")

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	DWORD ep = (DWORD)DetourGetEntryPoint(GetModuleHandle(0));
	char str[10];
	itoa(ep, str, 10);
	MessageBoxA(0, str, 0, 0);
	return true;
}

拦截DLL注入： 当本DLL被加载后，我们就无法向程序中注入DLL了，起到了简单保护进程的目的。

#include <Windows.h>
#include <detours.h>
#include <stdio.h>
#pragma comment(lib,"detours.lib")

static HMODULE(WINAPI* Old_LoadLibraryA)(LPCSTR lpFileName) = LoadLibraryA;
static FARPROC(WINAPI* Old_GetProcAddress)(HMODULE hModule, LPCSTR lpProcName) = GetProcAddress;

HMODULE WINAPI MyLoadLibraryA(LPCSTR lpFileName){
	return Old_LoadLibraryA("");
}
FARPROC WINAPI MyGetProcAddress(HMODULE hModule, LPCSTR lpProcName){
	return Old_GetProcAddress(0, "");
}
bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	int Error = DetourTransactionBegin();
	if (Error == NO_ERROR)
	{
		DetourUpdateThread(GetCurrentThread());
		DetourAttach(&(PVOID&)Old_LoadLibraryA, MyLoadLibraryA);
		DetourAttach(&(PVOID&)Old_GetProcAddress, MyGetProcAddress);
		DetourTransactionCommit();
	}
	return true;
}

自定义Hook函数： 有时候我们需要自定义Hook对象，这时候我们就可以使用本方法，直接在最后写上我们需要Hook的地址即可。

#include <Windows.h>
#include <detours.h>
#pragma comment(lib,"detours.lib")

static int(WINAPI* Old_MessageBoxA)(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType) = (int(WINAPI *)(HWND, LPCSTR, LPCSTR, UINT))0x755A1F70;

int WINAPI MyMessageBoxA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)
{
	return Old_MessageBoxA(hWnd, lpText, lpCaption, uType);
}

bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	int Error = DetourTransactionBegin();
	if (Error == NO_ERROR)
	{
		DetourUpdateThread(GetCurrentThread());
		DetourAttach(&(LPVOID&)Old_MessageBoxA, MyMessageBoxA);
		DetourTransactionCommit();
	}
	return true;
}

MinHook 库的使用（64位）

由于Detours hook库的X64版本是商业版无法直接使用，想要X64挂钩这里推荐使用MinHook，该Hook库是完全开源免费的，使用起来也非常的简单。

MinHook的GitHub地址：https://github.com/TsudaKageyu/minhook

首先在Git上下载，下载好以后直接解压到指定磁盘，然后会看到一下目录结构，选择对应的版本，进行编译即可。

img

编译好后，会生成以下文件，拷贝这两个文件，然后配合头文件使用即可。

img

MinHook入门： 同样是Hook MessageBox 用库就这么简单，自己写很麻烦！

#include <Windows.h>
#include <MinHook.h>
#pragma comment(lib,"libMinHook.x64.lib")

typedef int (WINAPI *MESSAGEBOXW)(HWND, LPCWSTR, LPCWSTR, UINT);
MESSAGEBOXW fpMessageBoxW = NULL;

int WINAPI MyMessageBoxW(HWND hWnd, LPCWSTR lpText, LPCWSTR lpCaption, UINT uType)
{
	return fpMessageBoxW(hWnd, L"hello lyshark", lpCaption, uType);
}
bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
{
	switch (dword)
	{
	case DLL_PROCESS_ATTACH:
		MH_Initialize();
		MH_CreateHook(&MessageBoxW, &MyMessageBoxW, reinterpret_cast<void**>(&fpMessageBoxW));
		MH_EnableHook(&MessageBoxW);
		break;
	case DLL_PROCESS_DETACH:
		MH_DisableHook(&MessageBoxW);
		MH_Uninitialize();
		break;
	}
	return true;
}

img

监控系统进程创建： 将下方DLL注入到explorer.exe进程中，即可监控系统的进程创建，在其中可以做查杀检测等，即可实现简单的主动防御。

#include <Windows.h>
#include <stdio.h>
#include <MinHook.h>
#pragma comment(lib,"libMinHook.x64.lib")

typedef int (WINAPI *CREATEPROCESSW)(LPCWSTR, LPWSTR, LPSECURITY_ATTRIBUTES,
	LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, LPCWSTR, LPSTARTUPINFOW, LPPROCESS_INFORMATION);
CREATEPROCESSW pfnCreateProcessW = NULL;

int WINAPI MyCreateProcessW( LPCWSTR lpApplicationName,
	 LPWSTR lpCommandLine,
	 LPSECURITY_ATTRIBUTES lpProcessAttributes,
	 LPSECURITY_ATTRIBUTES lpThreadAttributes,
	 BOOL bInheritHandles,
	 DWORD dwCreationFlags,
	 LPVOID lpEnvironment,
	 LPCWSTR lpCurrentDirectory,
	 LPSTARTUPINFOW lpStartupInfo,
	 LPPROCESS_INFORMATION lpProcessInformation)
{
		int nRetn = pfnCreateProcessW(lpApplicationName,
			lpCommandLine,
			lpProcessAttributes,
			lpThreadAttributes,
			bInheritHandles,
			dwCreationFlags,
			lpEnvironment,
			lpCurrentDirectory,
			lpStartupInfo,
			lpProcessInformation);
		MessageBoxW(0, lpApplicationName, 0, 0);
	return nRetn;
}

BOOL APIENTRY DllMain(HMODULE hModule,DWORD  ul_reason_for_call,LPVOID lpReserved)
{
	if (MH_Initialize() == MH_OK)
	{
		OutputDebugStringW(L"MH_Initialize success");
	}
	if (MH_CreateHook(&CreateProcessW, &MyCreateProcessW, reinterpret_cast<void **>(&pfnCreateProcessW)) == MH_OK)
	{
		OutputDebugStringW(L"MH_CreateHook success");
	}
	if (MH_EnableHook(&CreateProcessW) == MH_OK)
	{
		OutputDebugStringW(L"MH_Initialize success");
	}
	return TRUE;
}

实现禁止结束进程： 通过将DLL注入到系统的任务管理器中，实现禁止QQ进程被强制结束。

#include <Windows.h>
#include <stdio.h>
#include <MinHook.h>
#pragma comment(lib,"libMinHook.x64.lib")

typedef HANDLE(WINAPI *OPENPROCESS)(DWORD, BOOL, DWORD);
OPENPROCESS pfnOpenProcess = NULL;

HANDLE WINAPI MyOpenProcess(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwProcessId)
{
	HWND myhwnd = 0;

	myhwnd = FindWindowW(L"TXGuiFoundation", L"QQ");
	if (myhwnd != NULL)
	{
		HANDLE Retn = pfnOpenProcess(dwDesiredAccess, bInheritHandle, 0);
		return Retn;
	}
	HANDLE Retn = pfnOpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId);
	return Retn;
}
BOOL APIENTRY DllMain(HMODULE hModule,DWORD  ul_reason_for_call,LPVOID lpReserved)
{
	MH_Initialize();
	MH_CreateHook(&OpenProcess, &MyOpenProcess, reinterpret_cast<void **>(&pfnOpenProcess));
	MH_EnableHook(&OpenProcess);
	return TRUE;
}

上方代码需要注意：任务管理器终止进程其实是调用了TerminateProcess函数来执行强杀进程的，正常情况下应该hook该函数，但此处我们Hook了OpenProcess这个打开进程的API，这是因为在我们结束进程时，系统会先打开进程来获取到进程句柄，然后才会调用TerminateProcess并传递句柄来强制杀掉进程，我们只需要让打开进程失效，此时TerminateProcess函数将得不到正确的句柄，从而无法完成结束进程。

32/64 Min Hook (更多案例)

Hook 实现修改弹窗: 实现Hook MsgBox弹窗,该库的原理与我们上面手动实现的方式是相同的.

#include <Windows.h>
#include <MinHook.h>

#pragma comment(lib,"libMinHook.x86.lib")

typedef int (WINAPI *OldMessageBox)(HWND, LPCSTR, LPCSTR, UINT);

OldMessageBox fpMessageBoxA = NULL;

int WINAPI MyMessageBoxA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)
{
	int ret = fpMessageBoxA(hWnd, "Hook Inject", lpCaption, uType);
	return ret;
}

void SetHook()
{
	if (MH_Initialize() == MB_OK)
	{
		MH_CreateHook(&MessageBoxA, &MyMessageBoxA, reinterpret_cast<void**>(&fpMessageBoxA));
		MH_EnableHook(&MessageBoxA);
	}
}

void UnHook()
{
	if (MH_DisableHook(&MessageBoxA) == MB_OK)
	{
		MH_Uninitialize();
	}
}

BOOL APIENTRY DllMain(HMODULE hModule,DWORD ul_reason_for_call,LPVOID lpReserved)
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		SetHook();
		break;
	case DLL_PROCESS_DETACH:
		UnHook();
		break;
	}
	return TRUE;
}

Hook 实现修改标题:

#include <Windows.h>
#include <MinHook.h>
#pragma comment(lib,"libMinHook.x86.lib")

typedef BOOL (WINAPI *OldSetWindowTextA)(HWND, LPCSTR);

OldSetWindowTextA fpSetWindowTextA = NULL;

BOOL WINAPI MySetWindowTextA(HWND hWnd, LPCSTR lpString)
{
	BOOL ret = fpSetWindowTextA(hWnd, "破解版本");
	return ret;
}

void SetHook()
{
	if (MH_Initialize() == MB_OK)
	{
		MH_CreateHook(&SetWindowTextA, &MySetWindowTextA, reinterpret_cast<void**>(&fpSetWindowTextA));
		MH_EnableHook(&SetWindowTextA);
	}
}

void UnHook()
{
	if (MH_DisableHook(&SetWindowTextA) == MB_OK)
	{
		MH_Uninitialize();
	}
}

BOOL APIENTRY DllMain(HMODULE hModule,DWORD ul_reason_for_call,LPVOID lpReserved)
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		SetHook();
		break;
	case DLL_PROCESS_DETACH:
		UnHook();
		break;
	}
	return TRUE;
}

Hook 实现拦截文件创建: 文件的创建离不开CreateFileA函数，我们可以Hook这个函数，来拦截程序创建文件，此方法可用于对抗恶意代码，一些杀软也会通过Hook的方式监控文件的创建。

#include <Windows.h>
#include <MinHook.h>
#pragma comment(lib,"libMinHook.x86.lib")

typedef HANDLE(WINAPI *OldCreateFileA)(LPCSTR, DWORD, DWORD, LPSECURITY_ATTRIBUTES, DWORD, DWORD, HANDLE);

OldCreateFileA fpCreateFileA = NULL;

// 定义个性化的CreateFileA 并实现过滤功能
HANDLE WINAPI MyCreateFileA(LPCSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode,
	LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile)
{
	char *path = "c://test.txt";
	if (strcmp(lpFileName, path))
	{
		MessageBoxA(NULL, lpFileName, "MsgBox", NULL);
		MessageBoxA(0, TEXT("拦截到创建文件请求"), 0, 0);
		lpFileName = "";
	}
	return fpCreateFileA(lpFileName, dwDesiredAccess, dwShareMode, lpSecurityAttributes, 
		dwCreationDisposition, dwFlagsAndAttributes, hTemplateFile);
}

void SetHook()
{
	if (MH_Initialize() == MB_OK)
	{
		// 参数一: 函数名称 参数二: 自定义函数 参数三: 原始函数指针
		MH_CreateHook(&CreateFileA, &MyCreateFileA, reinterpret_cast<void**>(&fpCreateFileA));
		MH_EnableHook(&CreateFileA);
	}
}

void UnHook()
{
	if (MH_DisableHook(&CreateFileA) == MB_OK)
	{
		MH_Uninitialize();
	}
}

BOOL APIENTRY DllMain(HMODULE hModule,DWORD ul_reason_for_call,LPVOID lpReserved)
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		SetHook();
		break;
	case DLL_PROCESS_DETACH:
		UnHook();
		break;
	}
	return TRUE;
}

Hook 实现监控进程创建: 将下方DLL注入到explorer.exe进程中,即可监控系统的进程创建,在其中可以做查杀检测等,即可实现简单的主动防御.

#include <Windows.h>
#include <stdio.h>
#include <MinHook.h>

#pragma comment(lib,"libMinHook.x64.lib")

typedef int (WINAPI *OldCreateProcessW)(LPCWSTR, LPWSTR, LPSECURITY_ATTRIBUTES,LPSECURITY_ATTRIBUTES, BOOL, 
	DWORD, LPVOID, LPCWSTR, LPSTARTUPINFOW, LPPROCESS_INFORMATION);

OldCreateProcessW fpCreateProcessW = NULL;

int WINAPI MyCreateProcessW(LPCWSTR lpApplicationName,LPWSTR lpCommandLine,LPSECURITY_ATTRIBUTES lpProcessAttributes,
	LPSECURITY_ATTRIBUTES lpThreadAttributes,BOOL bInheritHandles,DWORD dwCreationFlags,LPVOID lpEnvironment,
	LPCWSTR lpCurrentDirectory,LPSTARTUPINFOW lpStartupInfo,LPPROCESS_INFORMATION lpProcessInformation)
{
	MessageBoxW(0, lpApplicationName, 0, 0);

	int nRetn = fpCreateProcessW(lpApplicationName, lpCommandLine, lpProcessAttributes, lpThreadAttributes,
		bInheritHandles, dwCreationFlags, lpEnvironment, lpCurrentDirectory, lpStartupInfo, lpProcessInformation);
	return nRetn;
}

void SetHook()
{
	if (MH_Initialize() == MB_OK)
	{
		// 参数一: 函数名称 参数二: 自定义函数 参数三: 原始函数指针
		MH_CreateHook(&CreateProcessW, &MyCreateProcessW, reinterpret_cast<void**>(&fpCreateProcessW));
		MH_EnableHook(&CreateProcessW);
	}
}

void UnHook()
{
	if (MH_DisableHook(&CreateProcessW) == MB_OK)
	{
		MH_Uninitialize();
	}
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		SetHook();
		break;
	case DLL_PROCESS_DETACH:
		UnHook();
		break;
	}
	return TRUE;
}

Hook 实现禁止结束进程: 通过将DLL注入到系统的任务管理器中,实现禁止结束某个进程,任务管理器通过调用TerminateProcess()函数来执行强杀进程,我们只需要Hook系统中的OpenProcess()打开进程并让其返回假,那么TerminateProcess()拿不到句柄也就无法完成结束进程了.

#include <Windows.h>
#include <stdio.h>
#include <MinHook.h>

#pragma comment(lib,"libMinHook.x64.lib")

typedef HANDLE(WINAPI *OldOpenProcess)(DWORD, BOOL, DWORD);

OldOpenProcess fpOpenProcess = NULL;

HANDLE WINAPI MyOpenProcess(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwProcessId)
{
	HWND handle = NULL;

	handle = FindWindow(L"TXGuiFoundation", L"QQ");
	if (handle != NULL)
	{
		HANDLE Retn = fpOpenProcess(dwDesiredAccess, bInheritHandle, 0);
		return Retn;
	}

	HANDLE Retn = fpOpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId);
	return Retn;
}

void SetHook()
{
	if (MH_Initialize() == MB_OK)
	{
		// 参数一: 函数名称 参数二: 自定义函数 参数三: 原始函数指针
		MH_CreateHook(&OpenProcess, &MyOpenProcess, reinterpret_cast<void**>(&MyOpenProcess));
		MH_EnableHook(&OpenProcess);
	}
}

void UnHook()
{
	if (MH_DisableHook(&OpenProcess) == MB_OK)
	{
		MH_Uninitialize();
	}
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		SetHook();
		break;
	case DLL_PROCESS_DETACH:
		UnHook();
		break;
	}
	return TRUE;
}
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