apihook

吴为2009 2010-03-17 08:20:36

// SimpleHook.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"
DWORD* lpAddr;
PROC OldProc;
BOOL __stdcall MyTerminateProcess(HANDLE hProcess,UINT uExitCode)
{
MessageBox(NULL,"没法结束进程了吧 http://www.nohack.cn/","API HOOK",0);
return 0;
}

int ApiHook(char *DllName,//DLL文件名
PROC OldFunAddr,//要HOOK的函数地址
PROC NewFunAddr//我们够造的函数地址
)
{
//得到函数进程模块基地址
HMODULE lpBase = GetModuleHandle(NULL);
IMAGE_DOS_HEADER *dosHeader;
IMAGE_NT_HEADERS *ntHeader;
IMAGE_IMPORT_BY_NAME *ImportName;
//定位到DOS头
dosHeader=(IMAGE_DOS_HEADER*)lpBase;
//定位到PE头
ntHeader=(IMAGE_NT_HEADERS32*)((BYTE*)lpBase+dosHeader->e_lfanew);
//定位到导入表
IMAGE_IMPORT_DESCRIPTOR *pImportDesc=(IMAGE_IMPORT_DESCRIPTOR*)((BYTE*)lpBase+ntHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress);
//循环遍历IMAGE_IMPORT_DESCRIPTOR机构数组
while(pImportDesc->FirstThunk)
{
//得到DLL文件名
char* pszDllName = (char*)((BYTE*)lpBase + pImportDesc->Name);
//比较得到的DLL文件名是否和要HOOK函数所在的DLL相同
if(lstrcmpiA(pszDllName, DllName) == 0)
{
break;
}
pImportDesc++;
}
//定位到FirstThunk参数指向的IMAGE_THUNK_DATA，此时这个结构已经是函数入口点地址了
IMAGE_THUNK_DATA* pThunk = (IMAGE_THUNK_DATA*)
((BYTE*)lpBase + pImportDesc->FirstThunk);
//遍历这部分IAT表
while(pThunk->u1.Function)
{
lpAddr = (DWORD*)&(pThunk->u1.Function);
//比较函数地址是否相同
if(*lpAddr == (DWORD)OldFunAddr)
{
DWORD dwOldProtect;
//修改内存包含属性
VirtualProtect(lpAddr, sizeof(DWORD), PAGE_READWRITE, &dwOldProtect);
//API函数的入口点地址改成我们构造的函数的地址
WriteProcessMemory(GetCurrentProcess(),lpAddr, &NewFunAddr, sizeof(DWORD), NULL);
}
pThunk++;
}
return 0;
}

BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
//得到TerminateProcess函数地址
OldProc = (PROC)TerminateProcess;
//定位，修改IAT表
ApiHook("kernel32.dll",OldProc,(PROC)MyTerminateProcess);
break;
case DLL_PROCESS_DETACH:
//恢复IAT表中API函数的入口点地址
WriteProcessMemory(GetCurrentProcess(),lpAddr, &OldProc, sizeof(DWORD), NULL);
break;
}
return TRUE;
}
代码在C++6.0中编译出现如下错误，--------------------Configuration: 7 - Win32 Debug--------------------
Compiling...
7.cpp
e:\最近工程\7.cpp(4) : fatal error C1083: Cannot open include file: 'stdafx.h': No such file or directory
Error executing cl.exe.

7.exe - 1 error(s), 0 warning(s)是怎么回事，请高手帮忙！！

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