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Help with Hardware Breakpoint

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sonexa
Newbie cheater

Reputation: 0

Joined: 19 Sep 2011
Posts: 16

Posted: Thu Jul 26, 2012 6:19 am Post subject: Help with Hardware Breakpoint

here is my code:

Code:

#include <Windows.h>
#include <TlHelp32.h>
#include <stdio.h>

const DWORD dwAddress = 0x0041C422;
const DWORD dwReturnAddress = 0x0041c428;

PVOID hVectoredExceptionHandler = NULL;

void __declspec(naked) change_text_stub(void) {
__asm {
   mov eax, 0xFFFEA06F
jmp [dwReturnAddress]
}
}

LONG WINAPI ExceptionFilter(PEXCEPTION_POINTERS ExceptionInfo) {
if(ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_SINGLE_STEP) {
if((DWORD)ExceptionInfo->ExceptionRecord->ExceptionAddress == dwAddress) {
PCONTEXT debug_context = ExceptionInfo->ContextRecord;
printf("Breakpoint hit\n");
debug_context->Eip = (DWORD)&change_text_stub;
      debug_context->Eax = 0xFFFEA06F;
return EXCEPTION_CONTINUE_EXECUTION;
}
}
return EXCEPTION_CONTINUE_SEARCH;
}

void set_breakpoints(void) {
HANDLE hTool32 = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
if(hTool32 != INVALID_HANDLE_VALUE) {
THREADENTRY32 thread_entry32;
thread_entry32.dwSize = sizeof(THREADENTRY32);
FILETIME exit_time, kernel_time, user_time;
FILETIME creation_time;
FILETIME prev_creation_time;
prev_creation_time.dwLowDateTime = 0xFFFFFFFF;
prev_creation_time.dwHighDateTime = INT_MAX;
HANDLE hMainThread = NULL;
if(Thread32First(hTool32, &thread_entry32)) {
do {
if(thread_entry32.dwSize >= FIELD_OFFSET(THREADENTRY32, th32OwnerProcessID) + sizeof(thread_entry32.th32OwnerProcessID)
&& thread_entry32.th32OwnerProcessID == GetCurrentProcessId()
&& thread_entry32.th32ThreadID != GetCurrentThreadId()) {
HANDLE hThread = OpenThread(THREAD_SET_CONTEXT | THREAD_GET_CONTEXT | THREAD_QUERY_INFORMATION,
FALSE, thread_entry32.th32ThreadID);
GetThreadTimes(hThread, &creation_time, &exit_time, &kernel_time, &user_time);
if(CompareFileTime(&creation_time, &prev_creation_time) == -1) {
memcpy(&prev_creation_time, &creation_time, sizeof(FILETIME));
if(hMainThread != NULL)
CloseHandle(hMainThread);
hMainThread = hThread;
}
else
CloseHandle(hThread);
}
thread_entry32.dwSize = sizeof(THREADENTRY32);
} while(Thread32Next(hTool32, &thread_entry32));
(void)SetUnhandledExceptionFilter(ExceptionFilter);
CONTEXT thread_context = {CONTEXT_DEBUG_REGISTERS};
thread_context.Dr0 = dwAddress;
thread_context.Dr7 = (1 << 0);
SetThreadContext(hMainThread, &thread_context);
CloseHandle(hMainThread);
}
CloseHandle(hTool32);
}
}

int APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID reserved) {
if(reason == DLL_PROCESS_ATTACH) {
DisableThreadLibraryCalls(hModule);
if(AllocConsole()) {
freopen("CONOUT$", "w", stdout);
SetConsoleTitle(L"Console");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);
}
   set_breakpoints();
}
return TRUE;
}

this code works, but i need inject when the process is 100% executed. why? i want hook the dll but if i hook it doesnot work

Slugsnack
Grandmaster Cheater Supreme

Reputation: 71

Joined: 24 Jan 2007
Posts: 1857

Posted: Thu Jul 26, 2012 5:40 pm Post subject:

what does 100% executed mean? as far as i'm aware, the only definition of that is when the program completes and returns

Obitio
Advanced Cheater

Reputation: 0

Joined: 09 Apr 2012
Posts: 68
Location: null

Posted: Mon Jul 30, 2012 6:31 pm Post subject:

Slugsnack wrote:

what does 100% executed mean? as far as i'm aware, the only definition of that is when the program completes and returns

I think he means when it has been fully created?I'm not sure either..

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