利用HOOK API做进程保护器

其实就很简单，只是对TerminateProcess的HOOK，因为要阻止的不是本进程的，所以要用到全局钩子，也就是把他做成dll形式的!

首先，对前面的HOOK API进行封装CAPIHook：

[cpp] view plain copy

/////////////////////////////////////////////////////////
// APIHook.h文件
#ifndef __APIHOOK_H__
#define __APIHOOK_H__
#include <windows.h>
class CAPIHook
{
public:
CAPIHook(LPSTR pszModName,
LPSTR pszFuncName, PROC pfnHook, BOOL bExcludeAPIHookMod = TRUE);
virtual ~CAPIHook();
operator PROC() { return m_pfnOrig; }
// 实现
private:
LPSTR m_pszModName; // 导出要HOOK函数的模块的名字
LPSTR m_pszFuncName; // 要HOOK的函数的名字
PROC m_pfnOrig; // 原API函数地址
PROC m_pfnHook; // HOOK后函数的地址
BOOL m_bExcludeAPIHookMod; // 是否将HOOK API的模块排除在外
private:
static void ReplaceIATEntryInAllMods(LPSTR pszExportMod, PROC pfnCurrent,
PROC pfnNew, BOOL bExcludeAPIHookMod);
static void ReplaceIATEntryInOneMod(LPSTR pszExportMod,
PROC pfnCurrent, PROC pfnNew, HMODULE hModCaller);
// 下面的代码用来解决其它模块动态加载DLL的问题
private:
// 这两个指针用来将所有的CAPIHook对象连在一起
static CAPIHook *sm_pHeader;
CAPIHook *m_pNext;
private:
// 当一个新的DLL被加载时，调用此函数
static void WINAPI HookNewlyLoadedModule(HMODULE hModule, DWORD dwFlags);
// 用来跟踪当前进程加载新的DLL
static HMODULE WINAPI LoadLibraryA(PCSTR pszModulePath);
static HMODULE WINAPI LoadLibraryW(PCWSTR pszModulePath);
static HMODULE WINAPI LoadLibraryExA(PCSTR pszModulePath, HANDLE hFile, DWORD dwFlags);
static HMODULE WINAPI LoadLibraryExW(PCWSTR pszModulePath, HANDLE hFile, DWORD dwFlags);
// 如果请求已HOOK的API函数，则返回用户自定义函数的地址
static FARPROC WINAPI GetProcAddress(HMODULE hModule, PCSTR pszProcName);
private:
// 自动对这些函数进行挂钩
static CAPIHook sm_LoadLibraryA;
static CAPIHook sm_LoadLibraryW;
static CAPIHook sm_LoadLibraryExA;
static CAPIHook sm_LoadLibraryExW;
static CAPIHook sm_GetProcAddress;
};
#endif // __APIHOOK_H__

[cpp] view plain copy

//////////////////////////////////////////////////////////////
// APIHook.cpp文件
#include "stdafx.h"
#include "APIHook.h"
#include "Tlhelp32.h"
#include <ImageHlp.h> // 为了调用ImageDirectoryEntryToData函数
#pragma comment(lib, "ImageHlp")
// CAPIHook对象链表的头指针
CAPIHook* CAPIHook::sm_pHeader = NULL;
CAPIHook::CAPIHook(LPSTR pszModName, LPSTR pszFuncName, PROC pfnHook, BOOL bExcludeAPIHookMod)
{
// 保存这个Hook函数的信息
m_bExcludeAPIHookMod = bExcludeAPIHookMod;
m_pszModName = pszModName;
m_pszFuncName = pszFuncName;
m_pfnHook = pfnHook;
m_pfnOrig = ::GetProcAddress(::GetModuleHandle(pszModName), pszFuncName);
// 将此对象添加到链表中
m_pNext = sm_pHeader;
sm_pHeader = this;
// 在所有当前已加载的模块中HOOK这个函数
ReplaceIATEntryInAllMods(m_pszModName, m_pfnOrig, m_pfnHook, bExcludeAPIHookMod);
}
CAPIHook::~CAPIHook()
{
// 取消对所有模块中函数的HOOK
ReplaceIATEntryInAllMods(m_pszModName, m_pfnHook, m_pfnOrig, m_bExcludeAPIHookMod);
CAPIHook *p = sm_pHeader;
// 从链表中移除此对象
if(p == this)
{
sm_pHeader = p->m_pNext;
}
else
{
while(p != NULL)
{
if(p->m_pNext == this)
{
p->m_pNext = this->m_pNext;
break;
}
p = p->m_pNext;
}
}
}
void CAPIHook::ReplaceIATEntryInOneMod(LPSTR pszExportMod,
PROC pfnCurrent, PROC pfnNew, HMODULE hModCaller)
{
// 取得模块的导入表（import descriptor）首地址。ImageDirectoryEntryToData函数可以直接返回导入表地址
ULONG ulSize;
PIMAGE_IMPORT_DESCRIPTOR pImportDesc = (PIMAGE_IMPORT_DESCRIPTOR)
::ImageDirectoryEntryToData(hModCaller, TRUE,
IMAGE_DIRECTORY_ENTRY_IMPORT, &ulSize);
if(pImportDesc == NULL) // 这个模块没有导入节表
{
return;
}
// 查找包含pszExportMod模块中函数导入信息的导入表项
while(pImportDesc->Name != 0)
{
LPSTR pszMod = (LPSTR)((DWORD)hModCaller + pImportDesc->Name);
if(lstrcmpiA(pszMod, pszExportMod) == 0) // 找到
break;
pImportDesc++;
}
if(pImportDesc->Name == 0) // hModCaller模块没有从pszExportMod模块导入任何函数
{
return;
}
// 取得调用者的导入地址表（import address table, IAT）
PIMAGE_THUNK_DATA pThunk = (PIMAGE_THUNK_DATA)(pImportDesc->FirstThunk + (DWORD)hModCaller);
// 查找我们要HOOK的函数，将它的地址用新函数的地址替换掉
while(pThunk->u1.Function)
{
// lpAddr指向的内存保存了函数的地址
PDWORD lpAddr = (PDWORD)&(pThunk->u1.Function);
if(*lpAddr == (DWORD)pfnCurrent)
{
// 修改页的保护属性
DWORD dwOldProtect;
MEMORY_BASIC_INFORMATION mbi;
::VirtualQuery(lpAddr, &mbi, sizeof(mbi));
::VirtualProtect(lpAddr, sizeof(DWORD), PAGE_READWRITE, &dwOldProtect);
// 修改内存地址相当于“*lpAddr = (DWORD)pfnNew;”
::WriteProcessMemory(::GetCurrentProcess(),
lpAddr, &pfnNew, sizeof(DWORD), NULL);
::VirtualProtect(lpAddr, sizeof(DWORD), dwOldProtect, 0);
break;
}
pThunk++;
}
}
void CAPIHook::ReplaceIATEntryInAllMods(LPSTR pszExportMod,
PROC pfnCurrent, PROC pfnNew, BOOL bExcludeAPIHookMod)
{
// 取得当前模块的句柄
HMODULE hModThis = NULL;
if(bExcludeAPIHookMod)
{
MEMORY_BASIC_INFORMATION mbi;
if(::VirtualQuery(ReplaceIATEntryInAllMods, &mbi, sizeof(mbi)) != 0)
hModThis = (HMODULE)mbi.AllocationBase;
}
// 取得本进程的模块列表
HANDLE hSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, ::GetCurrentProcessId());
// 遍历所有模块，分别对它们调用ReplaceIATEntryInOneMod函数，修改导入地址表
MODULEENTRY32 me = { sizeof(MODULEENTRY32) };
BOOL bOK = ::Module32First(hSnap, &me);
while(bOK)
{
// 注意：我们不HOOK当前模块的函数
if(me.hModule != hModThis)
ReplaceIATEntryInOneMod(pszExportMod, pfnCurrent, pfnNew, me.hModule);
bOK = ::Module32Next(hSnap, &me);
}
::CloseHandle(hSnap);
}
// 挂钩LoadLibrary和GetProcAddress函数，以便在这些函数被调用以后，挂钩的函数也能够被正确的处理
CAPIHook CAPIHook::sm_LoadLibraryA("Kernel32.dll", "LoadLibraryA",
(PROC)CAPIHook::LoadLibraryA, TRUE);
CAPIHook CAPIHook::sm_LoadLibraryW("Kernel32.dll", "LoadLibraryW",
(PROC)CAPIHook::LoadLibraryW, TRUE);
CAPIHook CAPIHook::sm_LoadLibraryExA("Kernel32.dll", "LoadLibraryExA",
(PROC)CAPIHook::LoadLibraryExA, TRUE);
CAPIHook CAPIHook::sm_LoadLibraryExW("Kernel32.dll", "LoadLibraryExW",
(PROC)CAPIHook::LoadLibraryExW, TRUE);
CAPIHook CAPIHook::sm_GetProcAddress("Kernel32.dll", "GetProcAddress",
(PROC)CAPIHook::GetProcAddress, TRUE);
void WINAPI CAPIHook::HookNewlyLoadedModule(HMODULE hModule, DWORD dwFlags)
{
// 如果一个新的模块被加载，挂钩各CAPIHook对象要求的API函数
if((hModule != NULL) && ((dwFlags&LOAD_LIBRARY_AS_DATAFILE) == 0))
{
CAPIHook *p = sm_pHeader;
while(p != NULL)
{
ReplaceIATEntryInOneMod(p->m_pszModName, p->m_pfnOrig, p->m_pfnHook, hModule);
p = p->m_pNext;
}
}
}
HMODULE WINAPI CAPIHook::LoadLibraryA(PCSTR pszModulePath)
{
HMODULE hModule = ::LoadLibraryA(pszModulePath);
HookNewlyLoadedModule(hModule, 0);
return(hModule);
}
HMODULE WINAPI CAPIHook::LoadLibraryW(PCWSTR pszModulePath)
{
HMODULE hModule = ::LoadLibraryW(pszModulePath);
HookNewlyLoadedModule(hModule, 0);
return(hModule);
}
HMODULE WINAPI CAPIHook::LoadLibraryExA(PCSTR pszModulePath, HANDLE hFile, DWORD dwFlags)
{
HMODULE hModule = ::LoadLibraryExA(pszModulePath, hFile, dwFlags);
HookNewlyLoadedModule(hModule, dwFlags);
return(hModule);
}
HMODULE WINAPI CAPIHook::LoadLibraryExW(PCWSTR pszModulePath, HANDLE hFile, DWORD dwFlags)
{
HMODULE hModule = ::LoadLibraryExW(pszModulePath, hFile, dwFlags);
HookNewlyLoadedModule(hModule, dwFlags);
return(hModule);
}
FARPROC WINAPI CAPIHook::GetProcAddress(HMODULE hModule, PCSTR pszProcName)
{
// 得到这个函数的真实地址
FARPROC pfn = ::GetProcAddress(hModule, pszProcName);
// 看它是不是我们要hook的函数
CAPIHook *p = sm_pHeader;
while(p != NULL)
{
if(p->m_pfnOrig == pfn)
{
pfn = p->m_pfnHook;
break;
}
p = p->m_pNext;
}
return pfn;
}

然后利用这个封装好的类开始做我们的DLL：

[cpp] view plain copy

bool WINAPI Hook_TerminateProcess(HANDLE hProcess, UINT nExitCode)
{
typedef bool (WINAPI *PFNTERMINATEPROCESS)(HANDLE, UINT);
char szPathName[256];
::GetModuleFileName(NULL, szPathName, 256);
char sz[2048];
wsprintf(sz, "进程号:%d %s, 进程句柄: %X, 退出代码: %d/n", ::GetCurrentProcess(), szPathName, hProcess, nExitCode);
COPYDATASTRUCT cds = {::GetCurrentProcessId(), strlen(sz) + 1, sz };
if(::SendMessage(::FindWindow(NULL, "进程保护器"), WM_COPYDATA, 0, (LPARAM)&cds) != -1)
{
return ((PFNTERMINATEPROCESS)(PROC)g_TerminateProcess)(hProcess, nExitCode);
}
return true;
}
CAPIHook g_TerminateProcess("kernel32.dll", "TerminateProcess", (PROC)Hook_TerminateProcess );
#pragma data_seg("YCIShared")
HHOOK g_hHook = NULL;
#pragma data_seg()
static HMODULE ModuleFromAddress(void *pv)
{
MEMORY_BASIC_INFORMATION mbi;
if(::VirtualQuery(pv, &mbi, sizeof(mbi)) != 0)
{
return (HMODULE)mbi.AllocationBase;
}
return NULL;
}
static LRESULT WINAPI GetMsgProc(int code, WPARAM wParam, LPARAM lParam)
{
return ::CallNextHookEx(g_hHook, code, wParam, lParam);
}
extern "C" int __declspec(dllexport)SetSysHook(bool bInstall, DWORD dwThreadId)
{
bool bOk;
if(bInstall)
{
g_hHook = ::SetWindowsHookEx(WH_GETMESSAGE, GetMsgProc, ModuleFromAddress(GetMsgProc), dwThreadId);
bOk = (g_hHook != NULL);
}
else
{
bOk = ::UnhookWindowsHookEx(g_hHook);
g_hHook = NULL;
}
return bOk;
}

编译，OK啦，已经做成我们要的DLL！

下面把他加载到我们所需要的程序中，因为DLL通过WM_COPYDATA发送了一个消息给了我们的程序的，因此我在程序中要响应此消息，重载WM_COPYDATA消息

[cpp] view plain copy

BOOL CHookTermTestDlg::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct)
{
// TODO: Add your message handler code here and/or call default
GetDlgItem(IDC_EDIT1)->SetWindowText((char *)pCopyDataStruct->lpData);
bool nForbid = ((CButton *)GetDlgItem(IDC_CHECK1))->GetCheck();
if(nForbid)
return -1;
return TRUE;
//return CDialog::OnCopyData(pWnd, pCopyDataStruct);
}

当然，也别忘了要加载那DLL的钩子，和卸载那钩子

[cpp] view plain copy

void CHookTermTestDlg::OnCheck1()
{
// TODO: Add your control notification handler code here
typedef int(*PFNSETSYSHOOK)(BOOL, DWORD);
char szDll[] = "HookTerm.dll";
bool nNeedFree = false;
HMODULE hModule = ::GetModuleHandle(szDll);
if(hModule == NULL)
{
hModule = ::LoadLibrary(szDll);
nNeedFree = true;
}
if(hModule == NULL)
{
}
PFNSETSYSHOOK mSetSysHook = (PFNSETSYSHOOK)GetProcAddress(hModule, "SetSysHook");
if(mSetSysHook == NULL)
{
if(nNeedFree)
::FreeLibrary(hModule);
return ;
}
bool bRet = mSetSysHook(TRUE, 0);
if(nNeedFree)
{
::FreeLibrary(hModule);
}
//SetSysHook(true, 0);
}

[cpp] view plain copy

void CHookTermTestDlg::OnButton1()
{
// TODO: Add your control notification handler code here
typedef int(*PFNSETSYSHOOK)(BOOL, DWORD);
char szDll[] = "HookTerm.dll";
bool nNeedFree = false;
HMODULE hModule = ::GetModuleHandle(szDll);
if(hModule == NULL)
{
hModule = ::LoadLibrary(szDll);
nNeedFree = true;
}
if(hModule == NULL)
{
}
PFNSETSYSHOOK mSetSysHook = (PFNSETSYSHOOK)GetProcAddress(hModule, "SetSysHook");
if(mSetSysHook == NULL)
{
if(nNeedFree)
::FreeLibrary(hModule);
return ;
}
bool bRet = mSetSysHook(false, 0);
if(nNeedFree)
{
::FreeLibrary(hModule);
}
CDialog::OnCancel();
}

利用HOOK API做进程保护器

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