IAThook失败

djj

将dll注入到release版exe中，用xuetr发现MessageboxA已经被挂钩但是hook失败，注入到debug版中hook成功，为啥呢？
@小甲鱼 @人造人
dll代码：

#include <windows.h>
#include <imagehlp.h>
#include <stdio.h>
#include "process.h"
#pragma comment(lib,"IMAGEHLP.lib")


/*

pDllName [in] - 要HOOK的API所在的DLL

pApiName [in] - 要HOOK的API的名称

iNewApi       [in] - 新的API入口地址

pOldApi       [out]    - 用于输出源API入口地址，

*/

int ReplaceIAT(const char *pDllName, const char *pApiName, INT_PTR iNewApi, INT_PTR *pOldApi)

{

        HANDLE hProcess = ::GetModuleHandle (NULL);

        DWORD dwSize = 0;

        PIMAGE_IMPORT_DESCRIPTOR pImageImport = (PIMAGE_IMPORT_DESCRIPTOR)ImageDirectoryEntryToData(hProcess,TRUE,

                IMAGE_DIRECTORY_ENTRY_IMPORT,&dwSize);

        if (NULL == pImageImport)

                return 1;

        PIMAGE_IMPORT_BY_NAME pImageImportByName = NULL;

        PIMAGE_THUNK_DATA   pImageThunkOriginal = NULL;

        PIMAGE_THUNK_DATA   pImageThunkReal  = NULL;

        while (pImageImport->Name)

        {

                char *pName = (char*)(PBYTE)hProcess+pImageImport->Name;

                if (0 == strcmpi((char*)((PBYTE)hProcess+pImageImport->Name),pDllName))

                {

                        break;

                }

                ++pImageImport;

        }

        if (!pImageImport->Name) return 2;

        pImageThunkOriginal = (PIMAGE_THUNK_DATA)((PBYTE)hProcess+pImageImport->OriginalFirstThunk);

        pImageThunkReal = (PIMAGE_THUNK_DATA)((PBYTE)hProcess+pImageImport->FirstThunk);

        while (pImageThunkOriginal->u1.Function)

        {

                if ((pImageThunkOriginal->u1.Ordinal & IMAGE_ORDINAL_FLAG) != IMAGE_ORDINAL_FLAG)

                {

                        pImageImportByName = (PIMAGE_IMPORT_BY_NAME)((PBYTE)hProcess+pImageThunkOriginal->u1.AddressOfData);

                        if (0 == strcmpi(pApiName,(char*)pImageImportByName->Name))

                        {

                                MEMORY_BASIC_INFORMATION mbi_thunk;

                                VirtualQuery(pImageThunkReal, &mbi_thunk, sizeof(MEMORY_BASIC_INFORMATION));

                                VirtualProtect(mbi_thunk.BaseAddress,mbi_thunk.RegionSize, PAGE_READWRITE, &mbi_thunk.Protect);



                                *pOldApi =(INT_PTR) pImageThunkReal->u1.Function;

                                pImageThunkReal->u1.Function = (DWORD)iNewApi;



                                DWORD dwOldProtect;

                                VirtualProtect(mbi_thunk.BaseAddress, mbi_thunk.RegionSize, mbi_thunk.Protect, &dwOldProtect);

                                break;

                        }

                }

                ++pImageThunkOriginal;

                ++pImageThunkReal;

        }

        return 0;

}



//自己想hook函数这里 
typedef int (WINAPI *MESSAGEBOXA)(HWND, LPCWSTR, LPCWSTR, UINT);

// Pointer for calling original MessageBoxW.
MESSAGEBOXA fpMessageBoxA = NULL;

// Detour function which overrides MessageBoxW.
int WINAPI DetourMessageBoxA(HWND hWnd, LPCWSTR lpText, LPCWSTR lpCaption, UINT uType)
{
        return fpMessageBoxA(hWnd, L"Hookedbybybyby!", lpCaption, uType);
}

void ThreadProc(void *param)
{

        ReplaceIAT("user32.dll","MessageBoxA", (INT_PTR)DetourMessageBoxA, (INT_PTR*)&fpMessageBoxA);
}



BOOL WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)
{
        switch (fdwReason)
        {
        case DLL_PROCESS_ATTACH:
                WinExec("notepad",SW_NORMAL);
                 _beginthread(ThreadProc,0,NULL);        //创建线程，调用ThreadProc
                //SetHook();
                //ReplaceIAT("user32.dll","MessageBoxA", (INT_PTR)DetourMessageBoxA, (INT_PTR*)&fpMessageBoxA);
                break;

        case DLL_PROCESS_DETACH:
                // Code to run when the DLL is freed
                break;

        case DLL_THREAD_ATTACH:
                // Code to run when a thread is created during the DLL's lifetime
                break;

        case DLL_THREAD_DETACH:
                // Code to run when a thread ends normally.
                break;
        }
        return TRUE;
}

exe代码:

#include "stdafx.h"
#include "stdio.h"
#include "windows.h"

int _tmain(int argc, _TCHAR* argv[])
{
        printf("test---/n");
        while(1)
        {
                getchar();
                MessageBoxA(NULL, "原函数", "09HookDemo", 0);
        }
        return 0;
}

人造人

Windows SDK 我还没有学