Пример #1
0
	NTSTATUS MMap::DisableExceptions(ImageContext* pImage) {
		BLACBONE_TRACE(L"ManualMap: Disabling exception support for image '%ls'", pImage->FileName.c_str());
		#ifdef USE64
		if(pImage->pExpTableAddr) {
			AsmJitHelper a;
			size_t result = 0;
			auto pRemoveTable = _process.Modules().GetExport(
				_process.Modules().GetModule(L"ntdll.dll", LdrList, pImage->peImage.ImageType()),
				"RtlDeleteFunctionTable"
				);
			a.GenPrologue();
			// RtlDeleteFunctionTable(pExpTable);
			a.GenCall(static_cast<size_t>(pRemoveTable.procAddress), {pImage->pExpTableAddr});
			_process.Remote().AddReturnWithEvent(a);
			a.GenEpilogue();
			auto status = _process.Remote().ExecInWorkerThread(a->make(), a->getCodeSize(), result);
			if(!NT_SUCCESS(status))
				return status;
			return MExcept::RemoveVEH((pImage->flags & CreateLdrRef) != 0);
		} else
			return STATUS_NOT_FOUND;
		#else
		return MExcept::RemoveVEH((pImage->flags & PartialExcept) != 0);
		#endif
	}
Пример #2
0
	bool MMap::RunModuleInitializers(ImageContext* pImage, DWORD dwReason) {
		AsmJitHelper a;
		uint64_t result = 0;
		auto hNtdll = _process.Modules().GetModule(L"ntdll.dll", LdrList, pImage->peImage.ImageType());
		auto pActivateActx = _process.Modules().GetExport(hNtdll, "RtlActivateActivationContext");
		auto pDeactivateeActx = _process.Modules().GetExport(hNtdll, "RtlDeactivateActivationContext");
		a.GenPrologue();
		// ActivateActCtx
		if(_pAContext.Valid() && pActivateActx.procAddress) {
			a->mov(a->zax, _pAContext.Ptr<size_t>());
			a->mov(a->zax, asmjit::host::dword_ptr(a->zax));
			a.GenCall(static_cast<size_t>(pActivateActx.procAddress), {0, a->zax, _pAContext.Ptr<size_t>() + sizeof(HANDLE)});
		}
		// Function order
		// TLS first, entry point last
		if(dwReason == DLL_PROCESS_ATTACH || dwReason == DLL_THREAD_ATTACH) {
			// PTLS_CALLBACK_FUNCTION(pImage->ImageBase, dwReason, NULL);
			if(!(pImage->flags & NoTLS))
				for(auto& pCallback : pImage->tlsCallbacks) {
					BLACBONE_TRACE(L"ManualMap: Calling TLS callback at 0x%p for '%ls', Reason: %d",
						static_cast<size_t>(pCallback), pImage->FileName.c_str(), dwReason);
					a.GenCall(static_cast<size_t>(pCallback), {pImage->imgMem.Ptr<size_t>(), dwReason, NULL});
				}
			// DllMain
			if(pImage->EntryPoint != 0) {
				BLACBONE_TRACE(L"ManualMap: Calling entry point for '%ls', Reason: %d", pImage->FileName.c_str(), dwReason);
				a.GenCall(static_cast<size_t>(pImage->EntryPoint), {pImage->imgMem.Ptr<size_t>(), dwReason, NULL});
			}
		}
		// Entry point first, TLS last
		else {
			// DllMain
			if(pImage->EntryPoint != 0) {
				BLACBONE_TRACE(L"ManualMap: Calling entry point for '%ls', Reason: %d", pImage->FileName.c_str(), dwReason);
				a.GenCall(static_cast<size_t>(pImage->EntryPoint), {pImage->imgMem.Ptr<size_t>(), dwReason, NULL});
			}
			// PTLS_CALLBACK_FUNCTION(pImage->ImageBase, dwReason, NULL);
			if(!(pImage->flags & NoTLS))
				for(auto& pCallback : pImage->tlsCallbacks) {
					BLACBONE_TRACE(L"ManualMap: Calling TLS callback at 0x%p for '%ls', Reason: %d",
						static_cast<size_t>(pCallback), pImage->FileName.c_str(), dwReason);
					a.GenCall(static_cast<size_t>(pCallback), {pImage->imgMem.Ptr<size_t>(), dwReason, NULL});
				}
		}
		// DeactivateActCtx
		if(_pAContext.Valid() && pDeactivateeActx.procAddress) {
			a->mov(a->zax, _pAContext.Ptr<size_t>() + sizeof(HANDLE));
			a->mov(a->zax, asmjit::host::dword_ptr(a->zax));
			a.GenCall(static_cast<size_t>(pDeactivateeActx.procAddress), {0, a->zax});
		}
		_process.Remote().AddReturnWithEvent(a, pImage->peImage.ImageType());
		a.GenEpilogue();
		_process.Remote().ExecInWorkerThread(a->make(), a->getCodeSize(), result);
		return true;
	}
Пример #3
0
/// <summary>
/// Create new thread and execute code in it. Wait until execution ends
/// </summary>
/// <param name="pCode">Code to execute</param>
/// <param name="size">Code size</param>
/// <param name="callResult">Code return value</param>
/// <returns>Status</returns>
NTSTATUS RemoteExec::ExecInNewThread( PVOID pCode, size_t size, uint64_t& callResult )
{
    AsmJitHelper a;
    NTSTATUS dwResult = STATUS_SUCCESS;

    // Write code
    dwResult = CopyCode( pCode, size );
    if (dwResult != STATUS_SUCCESS)
        return dwResult;

    bool switchMode = (_proc.core().native()->GetWow64Barrier().type == wow_64_32);
    auto pExitThread = _mods.GetExport( _mods.GetModule(
        L"ntdll.dll", LdrList, switchMode ? mt_mod64 : mt_default ),
        "NtTerminateThread" ).procAddress;

    if (pExitThread == 0)
        return LastNtStatus( STATUS_NOT_FOUND );

    a.GenPrologue( switchMode );

    // Prepare thread to run in x64 mode
    if(switchMode)
    {
        // Allocate new x64 activation stack
        auto createActStack = _mods.GetExport( _mods.GetModule( L"ntdll.dll", LdrList, mt_mod64 ),
                                               "RtlAllocateActivationContextStack" ).procAddress;
        if (createActStack)
        {
            a.GenCall( static_cast<size_t>(createActStack), { _userData.ptr<size_t>() + 0x3100 } );
            a->mov( a->zax, _userData.ptr<size_t>( ) + 0x3100 );
            a->mov( a->zax, a->intptr_ptr( a->zax ) );

            a.SetTebPtr();
            a->mov( a->intptr_ptr( a->zdx, 0x2C8 ), a->zax );
        }
    }

    a.GenCall( _userCode.ptr<size_t>(), { } );
    a.ExitThreadWithStatus( (size_t)pExitThread, _userData.ptr<size_t>() + INTRET_OFFSET );
    
    // Execute code in newly created thread
    if (_userCode.Write( size, a->getCodeSize(), a->make() ) == STATUS_SUCCESS)
    {
        auto thread = _threads.CreateNew( _userCode.ptr<ptr_t>() + size, _userData.ptr<ptr_t>()/*, HideFromDebug*/ );

        dwResult = thread.Join();
        callResult = _userData.Read<uint64_t>( INTRET_OFFSET, 0 );
    }
    else
        dwResult = LastNtStatus();

    return dwResult;
}
Пример #4
0
/// <summary>
/// Removes VEH from target process
/// </summary>
/// <returns></returns>
NTSTATUS MExcept::RemoveVEH()
{
    
    AsmJitHelper a;
    uint64_t result = 0;

    a.GenPrologue();

    // RemoveVectoredExceptionHandler(pHandler);
    a.GenCall( reinterpret_cast<void*>(&RemoveVectoredExceptionHandler), { _hVEH } );

    _proc.remote().AddReturnWithEvent( a );
    a.GenEpilogue();

    _proc.remote().ExecInWorkerThread( a->make(), a->getCodeSize(), result );
    _pVEHCode.Free();

    return STATUS_SUCCESS;
}
Пример #5
0
	NTSTATUS MMap::EnableExceptions(ImageContext* pImage) {
		BLACBONE_TRACE(L"ManualMap: Enabling exception support for image '%ls'", pImage->FileName.c_str());
		bool partial = (pImage->flags & PartialExcept) != 0;
		#ifdef USE64
		size_t size = pImage->peImage.DirectorySize(IMAGE_DIRECTORY_ENTRY_EXCEPTION);
		auto pExpTable = reinterpret_cast<PIMAGE_RUNTIME_FUNCTION_ENTRY>(pImage->peImage.DirectoryAddress(IMAGE_DIRECTORY_ENTRY_EXCEPTION));
		// Invoke RtlAddFunctionTable
		if(pExpTable) {
			AsmJitHelper a;
			uint64_t result = 0;
			pImage->pExpTableAddr = REBASE(pExpTable, pImage->peImage.FileBase(), pImage->imgMem.Ptr<ptr_t>());
			auto pAddTable = _process.Modules().GetExport(
				_process.Modules().GetModule(L"ntdll.dll", LdrList, pImage->peImage.ImageType()),
				"RtlAddFunctionTable"
				);
			a.GenPrologue();
			a.GenCall(
				static_cast<size_t>(pAddTable.procAddress), {
					pImage->pExpTableAddr,
					size / sizeof(IMAGE_RUNTIME_FUNCTION_ENTRY),
				pImage->imgMem.Ptr<size_t>()}
			);
			_process.Remote().AddReturnWithEvent(a, pImage->peImage.ImageType());
			a.GenEpilogue();
			auto status = _process.Remote().ExecInWorkerThread(a->make(), a->getCodeSize(), result);
			if(!NT_SUCCESS(status))
				return status;
			return (pImage->flags & CreateLdrRef) ? STATUS_SUCCESS :
				MExcept::CreateVEH(pImage->imgMem.Ptr<size_t>(), pImage->peImage.ImageSize(), pImage->peImage.ImageType(), partial);
		}
		// No exception table
		else
			return STATUS_NOT_FOUND;
		#else
		bool safeseh = false;
		if(!_process.NativeLdr().InsertInvertedFunctionTable(pImage->imgMem.Ptr<void*>(), pImage->peImage.ImageSize(), safeseh))
			return STATUS_UNSUCCESSFUL;
		return safeseh ? STATUS_SUCCESS :
			MExcept::CreateVEH(pImage->imgMem.Ptr<size_t>(), pImage->peImage.ImageSize(), pImage->peImage.ImageType(), partial);
		#endif
	}
Пример #6
0
	NTSTATUS MExcept::RemoveVEH(bool partial) {
		AsmJitHelper a;
		uint64_t result = 0;
		auto& mods = _proc.Modules();
		auto pRemoveHandler = mods.GetExport(mods.GetModule(L"ntdll.dll"), "RtlRemoveVectoredExceptionHandler").procAddress;
		if(pRemoveHandler == 0)
			return STATUS_NOT_FOUND;
		a.GenPrologue();
		// RemoveVectoredExceptionHandler(pHandler);
		a.GenCall(static_cast<size_t>(pRemoveHandler), {_hVEH});
		_proc.Remote().AddReturnWithEvent(a);
		a.GenEpilogue();
		// Destroy table and handler
		if(!partial) {
			_proc.Remote().ExecInWorkerThread(a->make(), a->getCodeSize(), result);
			_pVEHCode.Free();
			_hVEH = 0;
			_pModTable.Free();
		}
		return STATUS_SUCCESS;
	}
Пример #7
0
	bool MMap::CreateActx(const std::wstring& path, int id /*= 2 */, bool asImage /*= true*/) {
		AsmJitHelper a;
		uint64_t result = 0;
		ACTCTXW act = {0};
		_pAContext = _process.Memory().Allocate(512, PAGE_READWRITE);
		act.cbSize = sizeof(act);
		act.lpSource = reinterpret_cast<LPCWSTR>(_pAContext.Ptr<size_t>() + sizeof(HANDLE) + sizeof(act));
		// Ignore some fields for pure manifest file
		if(asImage) {
			act.dwFlags = ACTCTX_FLAG_RESOURCE_NAME_VALID;
			act.lpResourceName = MAKEINTRESOURCEW(id);
		}
		bool switchMode = (_process.Core().GetNative()->GetWow64Barrier().type == wow_64_32);
		auto pCreateActx = _process.Modules().GetExport(_process.Modules().GetModule(L"kernel32.dll"), "CreateActCtxW");
		if(pCreateActx.procAddress == 0) {
			BLACBONE_TRACE(L"ManualMap: Failed to create activation context for image '%ls'. 'CreateActCtxW' is absent", path.c_str());
			return false;
		}
		// CreateActCtx(&act)
		// Emulate Wow64
		if(switchMode) {
			_ACTCTXW_T<DWORD> act32 = {0};
			act32.cbSize = sizeof(act32);
			act32.dwFlags = ACTCTX_FLAG_RESOURCE_NAME_VALID;
			act32.lpSource = _pAContext.Ptr<uint32_t>() + sizeof(HANDLE) + sizeof(act32);
			act32.lpResourceName = id;
			a->push(_pAContext.Ptr<uint32_t>() + static_cast<uint32_t>(sizeof(HANDLE)));
			a->mov(asmjit::host::eax, static_cast<uint32_t>(pCreateActx.procAddress));
			a->call(a->zax);
			a->mov(asmjit::host::edx, _pAContext.Ptr<uint32_t>());
			//a->mov( asmjit::host::dword_ptr( asmjit::host::edx ), asmjit::host::eax );
			a->dw('\x01\x02');
			auto pTermThd = _process.Modules().GetExport(_process.Modules().GetModule(L"ntdll.dll"), "NtTerminateThread");
			a->push(a->zax);
			a->push(uint32_t(0));
			a->mov(asmjit::host::eax, static_cast<uint32_t>(pTermThd.procAddress));
			a->call(a->zax);
			a->ret(4);
			// Write path to file
			_pAContext.Write(sizeof(HANDLE), act32);
			_pAContext.Write(sizeof(HANDLE) + sizeof(act32), (path.length() + 1) * sizeof(wchar_t), path.c_str());
			auto pCode = _process.Memory().Allocate(0x1000);
			pCode.Write(0, a->getCodeSize(), a->make());
			result = _process.Remote().ExecDirect(pCode.Ptr<ptr_t>(), _pAContext.Ptr<size_t>() + sizeof(HANDLE));
		}
		// Native way
		else {
			a.GenPrologue();
			a.GenCall(static_cast<size_t>(pCreateActx.procAddress), {_pAContext.Ptr<size_t>() + sizeof(HANDLE)});
			a->mov(a->zdx, _pAContext.Ptr<size_t>());
			a->mov(a->intptr_ptr(a->zdx), a->zax);
			_process.Remote().AddReturnWithEvent(a);
			a.GenEpilogue();
			// Write path to file
			_pAContext.Write(sizeof(HANDLE), act);
			_pAContext.Write(sizeof(HANDLE) + sizeof(act), (path.length() + 1) * sizeof(wchar_t), path.c_str());
			_process.Remote().ExecInWorkerThread(a->make(), a->getCodeSize(), result);
		}
		if(reinterpret_cast<HANDLE>(result) == INVALID_HANDLE_VALUE) {
			_pAContext.Free();
			// SetLastError( err::mapping::CantCreateActx );
			BLACBONE_TRACE(L"ManualMap: Failed to create activation context for image '%ls'. Status: 0x%x",
				path.c_str(), _process.Remote().GetLastStatus());
			return false;
		}
		return true;
	}
Пример #8
0
	NTSTATUS MExcept::CreateVEH(size_t pTargetBase, size_t imageSize, eModType mt, bool partial) {
		AsmJitHelper a;
		uint64_t result = 0;
		auto& mods = _proc.Modules();
		#ifdef USE64 
		// Add module to module table
		if(!_pModTable.Valid()) {
			_pModTable = _proc.Memory().Allocate(0x1000);
			_pModTable.Release();
			if(!_pModTable.Valid())
				return LastNtStatus();
		}
		ModuleTable table;
		_pModTable.Read(0, table);
		// Add new entry to the table
		table.entry[table.count].base = pTargetBase;
		table.entry[table.count].size = imageSize;
		table.count++;
		_pModTable.Write(0, table);
		// No handler required
		if(partial)
			return STATUS_SUCCESS;
		// VEH codecave
		_pVEHCode = _proc.Memory().Allocate(0x2000);
		_pVEHCode.Release();
		if(!_pVEHCode.Valid())
			return LastNtStatus();
		BLACBONE_TRACE("ManualMap: Vectored hander: 0x%p\n", _pVEHCode.Ptr());
		asmjit::Label lExit = a->newLabel();
		asmjit::Label lLoop1 = a->newLabel();
		asmjit::Label skip1 = a->newLabel();
		asmjit::Label found1 = a->newLabel();
		//
		// Assembly code for VectoredHandler64
		// 0x10 - EXCEPTION_RECORD.ExceptionAddress
		// 0x20 - EXCEPTION_RECORD.ExceptionInformation[0]
		// 0x30 - EXCEPTION_RECORD.ExceptionInformation[2]
		// 0x38 - EXCEPTION_RECORD.ExceptionInformation[3]
		//
		a->mov(asmjit::host::rax, asmjit::host::qword_ptr(asmjit::host::rcx));
		a->cmp(asmjit::host::dword_ptr(asmjit::host::rax), EH_EXCEPTION_NUMBER);            // Exception code
		a->jne(lExit);
		a->cmp(asmjit::host::qword_ptr(asmjit::host::rax, 0x20), EH_PURE_MAGIC_NUMBER1);    // Sub code
		a->jne(lExit);
		a->cmp(asmjit::host::qword_ptr(asmjit::host::rax, 0x38), 0);                        // Image base
		a->jne(lExit);
		a->mov(asmjit::host::r9, _pModTable.Ptr());
		a->mov(asmjit::host::rdx, asmjit::host::qword_ptr(asmjit::host::r9));               // Record count
		a->add(asmjit::host::r9, sizeof(table.count));
		a->xor_(asmjit::host::r10, asmjit::host::r10);
		a->bind(lLoop1);
		a->mov(asmjit::host::r8, asmjit::host::qword_ptr(asmjit::host::rax, 0x30));
		a->mov(asmjit::host::r11, asmjit::host::qword_ptr(asmjit::host::r9));
		a->cmp(asmjit::host::r8, asmjit::host::r11);
		a->jl(skip1);
		a->add(asmjit::host::r11, asmjit::host::qword_ptr(asmjit::host::r9, sizeof(table.entry[0].base)));    // Size
		a->cmp(asmjit::host::r8, asmjit::host::r11);
		a->jg(skip1);
		a->jmp(found1);
		a->bind(skip1);
		a->add(asmjit::host::r9, sizeof(ExceptionModule));
		a->add(asmjit::host::r10, 1);
		a->cmp(asmjit::host::r10, asmjit::host::rdx);
		a->jne(lLoop1);
		a->jmp(lExit);
		a->bind(found1);
		a->mov(asmjit::host::qword_ptr(asmjit::host::rax, 0x20), EH_MAGIC_NUMBER1);
		a->mov(asmjit::host::rcx, asmjit::host::qword_ptr(asmjit::host::rcx));
		a->mov(asmjit::host::rdx, asmjit::host::qword_ptr(asmjit::host::r9));
		a->mov(asmjit::host::qword_ptr(asmjit::host::rax, 0x38), asmjit::host::rdx);
		a->bind(lExit);
		a->xor_(asmjit::host::rax, asmjit::host::rax);
		a->ret();
		a->db(0xCC);
		a->db(0xCC);
		a->db(0xCC);
		if(_pVEHCode.Write(0, a->getCodeSize(), a->make()) != STATUS_SUCCESS) {
			_pVEHCode.Free();
			return LastNtStatus();
		}
		#else
		UNREFERENCED_PARAMETER(pTargetBase);
		UNREFERENCED_PARAMETER(imageSize);
		// No handler required
		if(partial)
			return STATUS_SUCCESS;
		// VEH codecave
		_pVEHCode = _proc.Memory().Allocate(0x2000);
		_pVEHCode.Release();
		if(!_pVEHCode.Valid())
			return LastNtStatus();
		// Resolve compiler incremental table address, if any
		void *pFunc = ResolveJmp(&VectoredHandler);
		size_t fnSize = static_cast<size_t>(SizeOfProc(pFunc));
		size_t dataOfs = 0, code_ofs = 0, code_ofs2 = 0;;
		// Find and replace magic values
		for(uint8_t *pData = reinterpret_cast<uint8_t*>(pFunc);
		pData < reinterpret_cast<uint8_t*>(pFunc) + fnSize - 4;
			pData++) {
			// LdrpInvertedFunctionTable
			if(*(size_t*)pData == 0xDEADDA7A) {
				dataOfs = pData - reinterpret_cast<uint8_t*>(pFunc);
				continue;
			}
			// DecodeSystemPointer address
			if(*(size_t*)pData == 0xDEADC0DE) {
				code_ofs = pData - reinterpret_cast<uint8_t*>(pFunc);
				break;
			}
			// LdrProtectMrdata address
			if(*(size_t*)pData == 0xDEADC0D2) {
				code_ofs2 = pData - reinterpret_cast<uint8_t*>(pFunc);
				continue;
			}
		}
		auto pDecode = mods.GetExport(mods.GetModule(L"ntdll.dll", Sections, mt), "RtlDecodeSystemPointer").procAddress;
		// Write handler data into target process
		if(!NT_SUCCESS(_pVEHCode.Write(0, fnSize, pFunc)) ||
			!NT_SUCCESS(_pVEHCode.Write(dataOfs, _proc.NativeLdr().LdrpInvertedFunctionTable())) ||
			!NT_SUCCESS(_pVEHCode.Write(code_ofs, static_cast<size_t>(pDecode))) ||
			!NT_SUCCESS(_pVEHCode.Write(code_ofs2, _proc.NativeLdr().LdrProtectMrdata()))) {
			_pVEHCode.Free();
			return LastNtStatus();
		}
		#endif
		// AddVectoredExceptionHandler(0, pHandler);
		auto pAddHandler = mods.GetExport(mods.GetModule(L"ntdll.dll", Sections, mt), "RtlAddVectoredExceptionHandler").procAddress;
		if(pAddHandler == 0)
			return STATUS_NOT_FOUND;
		a->reset();
		a.GenPrologue();
		a.GenCall(static_cast<size_t>(pAddHandler), {0, _pVEHCode.Ptr<size_t>()});
		_proc.Remote().AddReturnWithEvent(a, mt);
		a.GenEpilogue();
		_proc.Remote().ExecInWorkerThread(a->make(), a->getCodeSize(), result);
		_hVEH = static_cast<size_t>(result);
		return (_hVEH == 0 ? STATUS_NOT_FOUND : STATUS_SUCCESS);
	}
Пример #9
0
/// <summary>
/// Inject VEH wrapper into process
/// Used to enable execution of SEH handlers out of image
/// </summary>
/// <param name="pTargetBase">Target image base address</param>
/// <param name="imageSize">Size of the image</param>
/// <returns>Error code</returns>
NTSTATUS MExcept::CreateVEH( size_t pTargetBase, size_t imageSize )
{    
    AsmJitHelper ea;
    uint64_t result = 0;
    
    // VEH codecave
    _pVEHCode = _proc.memory().Allocate( 0x2000 );
    _pVEHCode.Release();
    if (!_pVEHCode.valid())
        return LastNtStatus();

#ifdef USE64 
    asmjit::Label lExit = ea->newLabel();

    //
    // Assembly code for VectoredHandler64
    // 0x10 - EXCEPTION_RECORD.ExceptionAddress
    // 0x20 - EXCEPTION_RECORD.ExceptionInformation[0]
    // 0x30 - EXCEPTION_RECORD.ExceptionInformation[2]
    // 0x38 - EXCEPTION_RECORD.ExceptionInformation[3]
    //
    ea->mov( asmjit::host::rax, qword_ptr( asmjit::host::rcx ) );
    ea->cmp( asmjit::host::dword_ptr( asmjit::host::rax ), EH_EXCEPTION_NUMBER );
    ea->jne( lExit );
    ea->mov( asmjit::host::rdx, pTargetBase );
    ea->mov( asmjit::host::r8, asmjit::host::qword_ptr( asmjit::host::rax, 0x30 ) );
    ea->cmp( asmjit::host::r8, asmjit::host::rdx );;
    ea->jl( lExit );
    ea->add( asmjit::host::rdx, imageSize );
    ea->cmp( asmjit::host::r8, asmjit::host::rdx );;
    ea->jg( lExit );
    ea->cmp( asmjit::host::qword_ptr( asmjit::host::rax, 0x20 ), EH_PURE_MAGIC_NUMBER1 );;
    ea->jne( lExit );
    ea->cmp( asmjit::host::qword_ptr( asmjit::host::rax, 0x38 ), 0 );
    ea->jne( lExit );
    ea->mov( asmjit::host::qword_ptr( asmjit::host::rax, 0x20 ), EH_MAGIC_NUMBER1 );
    ea->mov( asmjit::host::rcx, qword_ptr( asmjit::host::rcx ) );
    ea->mov( asmjit::host::rdx, pTargetBase );
    ea->mov( asmjit::host::qword_ptr( asmjit::host::rax, 0x38 ), asmjit::host::rdx );
    ea->bind( lExit );
    ea->xor_( asmjit::host::rax, asmjit::host::rax );
    ea->ret();
    ea->emit( 0xCC );
    ea->emit( 0xCC );
    ea->emit( 0xCC );

    if (_pVEHCode.Write( 0, ea->getCodeSize(), ea->make() ) != STATUS_SUCCESS)
    {
        _pVEHCode.Free();
        return LastNtStatus();
    }
#else
    UNREFERENCED_PARAMETER( pTargetBase );
    UNREFERENCED_PARAMETER( imageSize );

    // Resolve compiler incremental table address if any
    void *pFunc = ResolveJmp( &VectoredHandler );
    size_t fnSize = static_cast<size_t>(SizeOfProc( pFunc ));
    size_t dataOfs = 0, code_ofs = 0;

    // Find and replace magic values
    for (uint8_t *pData = reinterpret_cast<uint8_t*>(pFunc);
          pData < reinterpret_cast<uint8_t*>(pFunc) + fnSize - 4; 
          pData++)
    {
        // LdrpInvertedFunctionTable
        if(*(size_t*)pData == 0xDEADDA7A)
        {
            dataOfs = pData - reinterpret_cast<uint8_t*>(pFunc);
            continue;
        }

        // DecodeSystemPointer address
        if(*(size_t*)pData == 0xDEADC0DE)
        {
            code_ofs = pData - reinterpret_cast<uint8_t*>(pFunc);
            break;
        }  
    }

    // Write handler data into target process
    if (_pVEHCode.Write( 0, fnSize, pFunc ) != STATUS_SUCCESS ||
         _pVEHCode.Write( dataOfs, _proc.nativeLdr().LdrpInvertedFunctionTable() ) != STATUS_SUCCESS ||
         _pVEHCode.Write( code_ofs, &DecodeSystemPointer ) != STATUS_SUCCESS)
    {
        _pVEHCode.Free();
        return LastNtStatus();
    }

#endif

    ea.GenPrologue();

    // AddVectoredExceptionHandler(0, pHandler);
    ea.GenCall( reinterpret_cast<void*>(&AddVectoredExceptionHandler), { 0, _pVEHCode.ptr<size_t>() } );

    _proc.remote().AddReturnWithEvent( ea );
    ea.GenEpilogue();

    _proc.remote().ExecInWorkerThread( ea->make(), ea->getCodeSize(), result );
    _hVEH = static_cast<size_t>(result);

    return (result == 0 ? STATUS_NOT_FOUND : STATUS_SUCCESS);
}