標 題:?EAT/IAT Hook

作 者: Y4ng

時 間: 2013-08-21

鏈 接:?http://www.cnblogs.com/Y4ng/p/EAT_IAT_HOOK.html?

#include <windows.h> #include <shlwapi.h> #include <wchar.h> DWORD MyZwGetContextThread(HANDLE Thread,LPCONTEXT lpContext) {memset(lpContext,0,sizeof(CONTEXT));return 0; } DWORD MyZwSetContextThread(HANDLE Thread,LPCONTEXT lpContext) {memset(lpContext,0,sizeof(CONTEXT));return 0; } /********************************************************** IAT Hook :掛鉤目標輸入表中的函數地址 參數: char *szDLLName 函數所在的DLL char *szName 函數名字 void *Addr 新函數地址 ***********************************************************/ DWORD IATHook(char *szDLLName,char *szName,void *Addr) {DWORD Protect;HMODULE hMod=LoadLibrary(szDLLName);DWORD RealAddr=(DWORD)GetProcAddress(hMod,szName);hMod=GetModuleHandle(NULL);IMAGE_DOS_HEADER * DosHeader =(PIMAGE_DOS_HEADER)hMod;IMAGE_OPTIONAL_HEADER * Opthdr =(PIMAGE_OPTIONAL_HEADER)((DWORD)hMod+DosHeader->e_lfanew+24);IMAGE_IMPORT_DESCRIPTOR *pImport =(IMAGE_IMPORT_DESCRIPTOR*)((BYTE*)DosHeader+Opthdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress); if(pImport==NULL){return FALSE;} IMAGE_THUNK_DATA32 *Pthunk=(IMAGE_THUNK_DATA32*)((DWORD)hMod+pImport->FirstThunk);while(Pthunk->u1.Function){if(RealAddr==Pthunk->u1.Function){VirtualProtect(&Pthunk->u1.Function,0x1000,PAGE_READWRITE,&Protect);Pthunk->u1.Function=(DWORD)Addr;break;}Pthunk++;}return TRUE; } /********************************************************** EAT Hook :掛鉤目標輸出表中的函數地址 ***********************************************************/ BOOL EATHook(char *szDLLName,char *szFunName,DWORD NewFun) {DWORD addr=0;DWORD index=0;HMODULE hMod=LoadLibrary(szDLLName);DWORD Protect;IMAGE_DOS_HEADER * DosHeader =(PIMAGE_DOS_HEADER)hMod;IMAGE_OPTIONAL_HEADER * Opthdr =(PIMAGE_OPTIONAL_HEADER)((DWORD)hMod+DosHeader->e_lfanew+24);PIMAGE_EXPORT_DIRECTORY Export =(PIMAGE_EXPORT_DIRECTORY)((BYTE*)DosHeader+ Opthdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);PULONG pAddressOfFunctions =(ULONG*)((BYTE*)hMod+Export->AddressOfFunctions); PULONG pAddressOfNames =(ULONG*)((BYTE*)hMod+Export->AddressOfNames); PUSHORT pAddressOfNameOrdinals=(USHORT*)((BYTE*)hMod+Export->AddressOfNameOrdinals); for (int i=0;i <Export->NumberOfNames; i++) {index=pAddressOfNameOrdinals[i];char *pFuncName = (char*)( (BYTE*)hMod + pAddressOfNames[i]);if (_stricmp( (char*)pFuncName,szFunName) == 0){addr=pAddressOfFunctions[index];break;}}VirtualProtect(&pAddressOfFunctions[index],0x1000,PAGE_READWRITE,&Protect);pAddressOfFunctions[index] =(DWORD)NewFun - (DWORD)hMod;return TRUE; } BOOL WINAPI DllMain(HMODULE hModule, DWORD dwReason, PVOID pvReserved) {if (dwReason == DLL_PROCESS_ATTACH){DisableThreadLibraryCalls(hModule);IATHook("kernel32.dll","ExitProcess",MyZwGetContextThread);//GetProcAddress(LoadLibrary("ntdll.dll"),"NtSetInformationFile"); /** Test EAT HOOK **///ExitThread(0); /** Test IAT HOOK**/ }return TRUE; }

轉自鄧韜

轉載于:https://www.cnblogs.com/Y4ng/p/EAT_IAT_HOOK.html

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