Discussion :

[Kalite]

Bonjour,

Je suis actuellement entrain de développer un programme permettant de remplacer la copie Windows. J'ai trouver qu'il fallait faire de l'injection de dll et en suite hooker les fonctions SHFileOperationA() et SHFileOperationW().
Actuellement j'injecte ma dll dans le processus explorer.exe et la sa ne HOOK pas.

La classe de hook de Jeffrey Richter qui est la suivante:
Fichier .h

Code :

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/******************************************************************************
Module:  APIHook.h
Notices: Copyright (c) 2000 Jeffrey Richter
******************************************************************************/
 
 
//#include <windows.h>
 
///////////////////////////////////////////////////////////////////////////////
 
class CAPIHook {
public:
   // Hook a function in all modules
   CAPIHook(PSTR pszCalleeModName, PSTR pszFuncName, PROC pfnHook,
      BOOL fExcludeAPIHookMod);
 
   // Unhook a function from all modules
   ~CAPIHook();
 
   // Returns the original address of the hooked function
   operator PROC() { return(m_pfnOrig); }
   PROC GetFnOrig() { return(m_pfnOrig); }
 
public:
   // Calls the real GetProcAddress
   static FARPROC WINAPI GetProcAddressRaw(HMODULE hmod, PCSTR pszProcName);
 
private:
   static PVOID sm_pvMaxAppAddr; // Maximum private memory address
   static CAPIHook* sm_pHead;    // Address of first object
   CAPIHook* m_pNext;            // Address of next object
 
   PCSTR m_pszCalleeModName;     // Module containing the function (ANSI)
   PCSTR m_pszFuncName;          // Function name in callee (ANSI)
   PROC  m_pfnOrig;              // Original function address in callee
   PROC  m_pfnHook;              // Hook function address
   BOOL  m_fExcludeAPIHookMod;   // Hook module w/CAPIHook implementation?
 
private:
   // Replaces a symbol's address in a module's import section
   static void WINAPI ReplaceIATEntryInAllMods(PCSTR pszCalleeModName,
      PROC pfnOrig, PROC pfnHook, BOOL fExcludeAPIHookMod);
 
   // Replaces a symbol's address in all module's import sections
   static void WINAPI ReplaceIATEntryInOneMod(PCSTR pszCalleeModName,
      PROC pfnOrig, PROC pfnHook, HMODULE hmodCaller);
 
private:
   // Used when a DLL is newly loaded after hooking a function
   static void    WINAPI FixupNewlyLoadedModule(HMODULE hmod, DWORD dwFlags);
 
   // Used to trap when DLLs are newly loaded
   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);
 
   // Returns address of replacement function if hooked function is requested
   static FARPROC WINAPI GetProcAddress(HMODULE hmod, PCSTR pszProcName);
 
private:
   // Instantiates hooks on these functions
   static CAPIHook sm_LoadLibraryA;
   static CAPIHook sm_LoadLibraryW;
   static CAPIHook sm_LoadLibraryExA;
   static CAPIHook sm_LoadLibraryExW;
   static CAPIHook sm_GetProcAddress;
};

fichier .cpp

Code :

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/******************************************************************************
Module:  APIHook.cpp
Notices: Copyright (c) 2000 Jeffrey Richter
******************************************************************************/
 
#include <Windows.h>
#include <ImageHlp.h>
#include <assert.h>
//Avec MinGW ajouter la lib ImageHlp au link
#pragma comment(lib, "ImageHlp")
 
#include "CAPIHook.h"
#include "CToolhelp.h"
 
///////////////////////////////////////////////////////////////////////////////
 
// When an application runs on Windows 98 under a debugger, the debugger
// makes the module's import section point to a stub that calls the desired
// function. To account for this, the code in this module must do some crazy
// stuff. These variables are needed to help with the crazy stuff.
 
 
// The highest private memory address (used for Windows 98 only)
PVOID CAPIHook::sm_pvMaxAppAddr = NULL;
const BYTE cPushOpCode = 0x68;   // The PUSH opcode on x86 platforms
 
///////////////////////////////////////////////////////////////////////////////
 
// The head of the linked-list of CAPIHook objects
CAPIHook* CAPIHook::sm_pHead = NULL;
 
///////////////////////////////////////////////////////////////////////////////
 
CAPIHook::CAPIHook(PSTR pszCalleeModName, PSTR pszFuncName, PROC pfnHook,
   BOOL fExcludeAPIHookMod) {
 
   if (sm_pvMaxAppAddr == NULL) {
      // Functions with address above lpMaximumApplicationAddress require
      // special processing (Windows 98 only)
      SYSTEM_INFO si;
      GetSystemInfo(&si);
      sm_pvMaxAppAddr = si.lpMaximumApplicationAddress;
   }
 
   m_pNext  = sm_pHead;    // The next node was at the head
   sm_pHead = this;        // This node is now at the head
 
   // Save information about this hooked function
   m_pszCalleeModName   = pszCalleeModName;
   m_pszFuncName        = pszFuncName;
   m_pfnHook            = pfnHook;
   m_fExcludeAPIHookMod = fExcludeAPIHookMod;
   HMODULE hMod			= GetModuleHandleA(pszCalleeModName);
   assert(hMod != NULL);	//Le module n'existe pas
   m_pfnOrig            = GetProcAddressRaw(hMod, m_pszFuncName);
   assert(m_pfnOrig != NULL);  //La focntion n'existe pas
 
   if (m_pfnOrig > sm_pvMaxAppAddr) {
      // The address is in a shared DLL; the address needs fixing up
      PBYTE pb = (PBYTE) m_pfnOrig;
      if (pb[0] == cPushOpCode) {
         // Skip over the PUSH op code and grab the real address
         PVOID pv = * (PVOID*) &pb[1];
         m_pfnOrig = (PROC) pv;
      }
   }
 
   // Hook this function in all currently loaded modules
   ReplaceIATEntryInAllMods(m_pszCalleeModName, m_pfnOrig, m_pfnHook,
      m_fExcludeAPIHookMod);
}
 
///////////////////////////////////////////////////////////////////////////////
 
CAPIHook::~CAPIHook() {
 
   // Unhook this function from all modules
   ReplaceIATEntryInAllMods(m_pszCalleeModName, m_pfnHook, m_pfnOrig,
      m_fExcludeAPIHookMod);
 
   // Remove this object from the linked list
   CAPIHook* p = sm_pHead;
   if (p == this) {     // Removing the head node
      sm_pHead = p->m_pNext;
   } else {
 
      BOOL fFound = FALSE;
 
      // Walk list from head and fix pointers
      for (; !fFound && (p->m_pNext != NULL); p = p->m_pNext) {
         if (p->m_pNext == this) {
            // Make the node that points to us point to the our next node
            p->m_pNext = p->m_pNext->m_pNext;
			fFound = TRUE;
         }
      }
      assert(fFound);
   }
}
 
///////////////////////////////////////////////////////////////////////////////
 
// NOTE: This function must NOT be inlined
FARPROC CAPIHook::GetProcAddressRaw(HMODULE hmod, PCSTR pszProcName) {
 
   return(::GetProcAddress(hmod, pszProcName));
}
 
///////////////////////////////////////////////////////////////////////////////
 
// Returns the HMODULE that contains the specified memory address
static HMODULE ModuleFromAddress(PVOID pv) {
 
   MEMORY_BASIC_INFORMATION mbi;
   return((VirtualQuery(pv, &mbi, sizeof(mbi)) != 0)
      ? (HMODULE) mbi.AllocationBase : NULL);
}
 
///////////////////////////////////////////////////////////////////////////////
 
void CAPIHook::ReplaceIATEntryInAllMods(PCSTR pszCalleeModName,
   PROC pfnCurrent, PROC pfnNew, BOOL fExcludeAPIHookMod) {
 
   HMODULE hmodThisMod = fExcludeAPIHookMod ? ModuleFromAddress((void*)ReplaceIATEntryInAllMods) : NULL;
 
   // Get the list of modules in this process
   CToolhelp th(TH32CS_SNAPMODULE, GetCurrentProcessId());
 
   MODULEENTRY32 me = { sizeof(me) };
   for (BOOL fOk = th.ModuleFirst(&me); fOk; fOk = th.ModuleNext(&me)) {
 
      // NOTE: We don't hook functions in our own module
      if (me.hModule != hmodThisMod) {
 
         // Hook this function in this module
         ReplaceIATEntryInOneMod(
            pszCalleeModName, pfnCurrent, pfnNew, me.hModule);
      }
   }
}
 
///////////////////////////////////////////////////////////////////////////////
 
void CAPIHook::ReplaceIATEntryInOneMod(PCSTR pszCalleeModName,
   PROC pfnCurrent, PROC pfnNew, HMODULE hmodCaller) {
 
   // Get the address of the module's import section
   ULONG ulSize;
   PIMAGE_IMPORT_DESCRIPTOR pImportDesc = (PIMAGE_IMPORT_DESCRIPTOR)
      ImageDirectoryEntryToData(hmodCaller, TRUE, IMAGE_DIRECTORY_ENTRY_IMPORT, &ulSize);
 
   if (pImportDesc == NULL)
      return;  // This module has no import section
 
 
   // Find the import descriptor containing references to callee's functions
   for (; pImportDesc->Name; pImportDesc++) {
      PSTR pszModName = (PSTR) ((PBYTE) hmodCaller + pImportDesc->Name);
      if (lstrcmpiA(pszModName, pszCalleeModName) == 0)
         break;   // Found
   }
 
   if (pImportDesc->Name == 0)
      return;  // This module doesn't import any functions from this callee
 
   // Get caller's import address table (IAT) for the callee's functions
   PIMAGE_THUNK_DATA pThunk = (PIMAGE_THUNK_DATA)
      ((PBYTE) hmodCaller + pImportDesc->FirstThunk);
 
   // Replace current function address with new function address
   for (; pThunk->u1.Function; pThunk++) {
 
      // Get the address of the function address
      PROC* ppfn = (PROC*) &pThunk->u1.Function;
 
      // Is this the function we're looking for?
      BOOL fFound = (*ppfn == pfnCurrent);
 
      if (!fFound && (*ppfn > sm_pvMaxAppAddr)) {
 
         // If this is not the function and the address is in a shared DLL,
         // then maybe we're running under a debugger on Windows 98. In this
         // case, this address points to an instruction that may have the
         // correct address.
 
         PBYTE pbInFunc = (PBYTE) *ppfn;
         if (pbInFunc[0] == cPushOpCode) {
            // We see the PUSH instruction, the real function address follows
            ppfn = (PROC*) &pbInFunc[1];
 
            // Is this the function we're looking for?
            fFound = (*ppfn == pfnCurrent);
         }
      }
 
      if (fFound) {
         // The addresses match, change the import section address
         WriteProcessMemory(GetCurrentProcess(), ppfn, &pfnNew,
            sizeof(pfnNew), NULL);
         return;  // We did it, get out
      }
   }
 
   // If we get to here, the function is not in the caller's import section
}
 
///////////////////////////////////////////////////////////////////////////////
 
// Hook LoadLibrary functions and GetProcAddress so that hooked functions
// are handled correctly if these functions are called.
 
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 CAPIHook::FixupNewlyLoadedModule(HMODULE hmod, DWORD dwFlags) {
 
   // If a new module is loaded, hook the hooked functions
   if ((hmod != NULL) && ((dwFlags & LOAD_LIBRARY_AS_DATAFILE) == 0)) {
 
      for (CAPIHook* p = sm_pHead; p != NULL; p = p->m_pNext) {
         ReplaceIATEntryInOneMod(p->m_pszCalleeModName,
            p->m_pfnOrig, p->m_pfnHook, hmod);
      }
   }
}
 
///////////////////////////////////////////////////////////////////////////////
 
HMODULE WINAPI CAPIHook::LoadLibraryA(PCSTR pszModulePath) {
 
   HMODULE hmod = ::LoadLibraryA(pszModulePath);
   FixupNewlyLoadedModule(hmod, 0);
   return(hmod);
}
 
///////////////////////////////////////////////////////////////////////////////
 
HMODULE WINAPI CAPIHook::LoadLibraryW(PCWSTR pszModulePath) {
 
   HMODULE hmod = ::LoadLibraryW(pszModulePath);
   FixupNewlyLoadedModule(hmod, 0);
   return(hmod);
}
 
 
///////////////////////////////////////////////////////////////////////////////
 
HMODULE WINAPI CAPIHook::LoadLibraryExA(PCSTR pszModulePath,
   HANDLE hFile, DWORD dwFlags) {
 
   HMODULE hmod = ::LoadLibraryExA(pszModulePath, hFile, dwFlags);
   FixupNewlyLoadedModule(hmod, dwFlags);
   return(hmod);
}
 
///////////////////////////////////////////////////////////////////////////////
 
HMODULE WINAPI CAPIHook::LoadLibraryExW(PCWSTR pszModulePath,
   HANDLE hFile, DWORD dwFlags) {
 
   HMODULE hmod = ::LoadLibraryExW(pszModulePath, hFile, dwFlags);
   FixupNewlyLoadedModule(hmod, dwFlags);
   return(hmod);
}
 
///////////////////////////////////////////////////////////////////////////////
 
FARPROC WINAPI CAPIHook::GetProcAddress(HMODULE hmod, PCSTR pszProcName) {
 
   // Get the true address of the function
   FARPROC pfn = GetProcAddressRaw(hmod, pszProcName);
 
   // Is it one of the functions that we want hooked?
   CAPIHook* p = sm_pHead;
   for (; (pfn != NULL) && (p != NULL); p = p->m_pNext) {
 
      if (pfn == p->m_pfnOrig) {
 
         // The address to return matches an address we want to hook
         // Return the hook function address instead
         pfn = p->m_pfnHook;
         break;
      }
   }
 
   return(pfn);
}

(Il y avait un bug dans de le destructeur que j'ai corriger)

Donc je voudrai savoir si des gens on des techniques différente de celle-ci qui consiste de remplacer l'adresse de la fonction dans la table d'importation des module.

Merci d'avance.

[Kalite]

Donc je suis toujours dessus.

J'ai fait un application de test dans laquelle j'injecte ma dll de hook et la le hook ce réalise correctement.

Personne n'a d'idée pourquoi sa hook pas dans explorer.exe ??

Dans un autre coté en faisant totalement autre chose j'ai trouver la clé de registre suivante : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks
Et malheureusement il n'y a aucune documentation de la part de Microsoft. J'ai juste vu qu'elle était beaucoup utilisé par les trojan mais pourquoi faire et dans quel but personne ne le dit.

Merci d'avance

[nicroman]

Cette clé contient le CLSID à instancier lors d'un double click.

Mais par défaut, la clé n'est pas utilisée (en tout cas, plus depuis NT5) à moins de spécifier dans les group-policies que le comportement doit être simulé (et étant donné la facilité d'insertion de malware par le biai de cette clé, rétablir ce comportement est loin d'être conseillé, et il y a peu de chance que sur un domaine, le domain admin mette la policy en tout cas ).

[Kalite]

Merci de ta réponse au sujet de clé de registre.

Bon il ne me reste plus qu'a trouver pourquoi le hook fonctionne pas.