IATReferenceScan.cpp
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IATReferenceScan.cpp
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	#include "IATReferenceScan.h"
	#include "Scylla.h"
	#include "Architecture.h"
	#include <set>

	//#define DEBUG_COMMENTS


	FileLog IATReferenceScan::directImportLog(L"Scylla_direct_imports.log");

	int IATReferenceScan::numberOfFoundDirectImports()
	{
	return (int)iatDirectImportList.size();
	}

	int IATReferenceScan::numberOfFoundUniqueDirectImports()
	{
	std::set<DWORD_PTR> apiPointers;
	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);
	apiPointers.insert(ref->targetAddressInIat);
	}

	return (int)apiPointers.size();
	}

	int IATReferenceScan::numberOfDirectImportApisNotInIat()
	{
	std::set<DWORD_PTR> apiPointers;
	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);

	if (ref->targetPointer == 0)
	{
	apiPointers.insert(ref->targetAddressInIat);
	}
	}

	return (int)apiPointers.size();
	}

	int IATReferenceScan::getSizeInBytesOfJumpTableInSection()
	{
	return (numberOfFoundUniqueDirectImports() * 6); //for x86 and x64 the same size, FF25 00000000
	}

	void IATReferenceScan::startScan(DWORD_PTR imageBase, DWORD imageSize, DWORD_PTR iatAddress, DWORD iatSize)
	{
	MEMORY_BASIC_INFORMATION memBasic = {0};

	IatAddressVA = iatAddress;
	IatSize = iatSize;
	ImageBase = imageBase;
	ImageSize = imageSize;

	if (ScanForNormalImports)
	{
	iatReferenceList.clear();
	iatReferenceList.reserve(200);
	}
	if (ScanForDirectImports)
	{
	iatDirectImportList.clear();
	iatDirectImportList.reserve(50);
	}



	DWORD_PTR section = imageBase;

	do
	{
	if (!VirtualQueryEx(ProcessAccessHelp::hProcess, (LPCVOID)section, &memBasic, sizeof(MEMORY_BASIC_INFORMATION)))
	{
	#ifdef DEBUG_COMMENTS
	Scylla::debugLog.log(L"VirtualQueryEx failed %d", GetLastError());
	#endif

	break;
	}
	else
	{
	if (isPageExecutable(memBasic.Protect))
	{
	//do read and scan
	scanMemoryPage(memBasic.BaseAddress, memBasic.RegionSize);
	}
	}

	section = (DWORD_PTR)((SIZE_T)section + memBasic.RegionSize);

	} while (section < (imageBase + imageSize));


	}

	//void IATReferenceScan::patchNewIatBaseMemory(DWORD_PTR newIatBaseAddress)
	//{
	// NewIatAddressVA = newIatBaseAddress;
	//
	// for (std::vector<IATReference>::iterator iter = iatReferenceList.begin(); iter != iatReferenceList.end(); iter++)
	// {
	// patchReferenceInMemory(&(*iter));
	// }
	//}
	//
	//void IATReferenceScan::patchNewIatBaseFile(DWORD_PTR newIatBaseAddress)
	//{
	// NewIatAddressVA = newIatBaseAddress;
	//
	// for (std::vector<IATReference>::iterator iter = iatReferenceList.begin(); iter != iatReferenceList.end(); iter++)
	// {
	// patchReferenceInFile(&(*iter));
	// }
	//}

	void IATReferenceScan::patchDirectImportsMemory( bool junkByteAfterInstruction )
	{
	JunkByteAfterInstruction = junkByteAfterInstruction;
	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	patchDirectImportInMemory(&(*iter));
	}
	}


	bool IATReferenceScan::isPageExecutable( DWORD Protect )
	{
	if (Protect & PAGE_NOCACHE) Protect ^= PAGE_NOCACHE;

	if (Protect & PAGE_WRITECOMBINE) Protect ^= PAGE_WRITECOMBINE;

	switch(Protect)
	{
	case PAGE_EXECUTE:
	{
	return true;
	}
	case PAGE_EXECUTE_READ:
	{
	return true;
	}
	case PAGE_EXECUTE_READWRITE:
	{
	return true;
	}
	case PAGE_EXECUTE_WRITECOPY:
	{
	return true;
	}
	default:
	return false;
	}

	}

	void IATReferenceScan::scanMemoryPage( PVOID BaseAddress, SIZE_T RegionSize )
	{
	BYTE * dataBuffer = (BYTE *)calloc(RegionSize, 1);
	BYTE * currentPos = dataBuffer;
	int currentSize = (int)RegionSize;
	DWORD_PTR currentOffset = (DWORD_PTR)BaseAddress;
	_DecodeResult res;
	unsigned int instructionsCount = 0, next = 0;

	if (!dataBuffer)
	return;

	if (ProcessAccessHelp::readMemoryFromProcess((DWORD_PTR)BaseAddress, RegionSize, (LPVOID)dataBuffer))
	{
	while (1)
	{
	ZeroMemory(&ProcessAccessHelp::decomposerCi, sizeof(_CodeInfo));
	ProcessAccessHelp::decomposerCi.code = currentPos;
	ProcessAccessHelp::decomposerCi.codeLen = currentSize;
	ProcessAccessHelp::decomposerCi.dt = ProcessAccessHelp::dt;
	ProcessAccessHelp::decomposerCi.codeOffset = currentOffset;

	instructionsCount = 0;

	res = distorm_decompose(&ProcessAccessHelp::decomposerCi, ProcessAccessHelp::decomposerResult, sizeof(ProcessAccessHelp::decomposerResult)/sizeof(ProcessAccessHelp::decomposerResult[0]), &instructionsCount);

	if (res == DECRES_INPUTERR)
	{
	break;
	}

	for (unsigned int i = 0; i < instructionsCount; i++)
	{
	if (ProcessAccessHelp::decomposerResult[i].flags != FLAG_NOT_DECODABLE)
	{
	analyzeInstruction(&ProcessAccessHelp::decomposerResult[i]);
	}
	}

	if (res == DECRES_SUCCESS) break; // All instructions were decoded.
	else if (instructionsCount == 0) break;

	next = (unsigned long)(ProcessAccessHelp::decomposerResult[instructionsCount-1].addr - ProcessAccessHelp::decomposerResult[0].addr);

	if (ProcessAccessHelp::decomposerResult[instructionsCount-1].flags != FLAG_NOT_DECODABLE)
	{
	next += ProcessAccessHelp::decomposerResult[instructionsCount-1].size;
	}

	currentPos += next;
	currentOffset += next;
	currentSize -= next;
	}
	}

	free(dataBuffer);
	}

	void IATReferenceScan::analyzeInstruction( _DInst * instruction )
	{
	if (ScanForNormalImports)
	{
	findNormalIatReference(instruction);
	}

	if (ScanForDirectImports)
	{
	findDirectIatReferenceMov(instruction);

	#ifndef _WIN64
	findDirectIatReferenceCallJmp(instruction);
	findDirectIatReferenceLea(instruction);
	findDirectIatReferencePush(instruction);
	#endif
	}
	}

	void IATReferenceScan::findNormalIatReference( _DInst * instruction )
	{
	#ifdef DEBUG_COMMENTS
	_DecodedInst inst;
	#endif

	IATReference ref;


	if (META_GET_FC(instruction->meta) == FC_CALL \|\| META_GET_FC(instruction->meta) == FC_UNC_BRANCH)
	{
	if (instruction->size >= 5)
	{
	if (META_GET_FC(instruction->meta) == FC_CALL)
	{
	ref.type = IAT_REFERENCE_PTR_CALL;
	}
	else
	{
	ref.type = IAT_REFERENCE_PTR_JMP;
	}
	ref.addressVA = (DWORD_PTR)instruction->addr;
	ref.instructionSize = instruction->size;

	#ifdef _WIN64
	if (instruction->flags & FLAG_RIP_RELATIVE)
	{

	#ifdef DEBUG_COMMENTS
	distorm_format(&ProcessAccessHelp::decomposerCi, instruction, &inst);
	Scylla::debugLog.log(PRINTF_DWORD_PTR_FULL L" " PRINTF_DWORD_PTR_FULL L" %S %S %d %d - target address: " PRINTF_DWORD_PTR_FULL, (DWORD_PTR)instruction->addr, ImageBase, inst.mnemonic.p, inst.operands.p, instruction->ops[0].type, instruction->size, INSTRUCTION_GET_RIP_TARGET(instruction));
	#endif

	if (INSTRUCTION_GET_RIP_TARGET(instruction) >= IatAddressVA && INSTRUCTION_GET_RIP_TARGET(instruction) < (IatAddressVA + IatSize))
	{
	ref.targetPointer = INSTRUCTION_GET_RIP_TARGET(instruction);

	getIatEntryAddress(&ref);

	//Scylla::debugLog.log(L"iat entry "PRINTF_DWORD_PTR_FULL,ref.targetAddressInIat);

	iatReferenceList.push_back(ref);
	}
	}
	#else

	if (instruction->ops[0].type == O_DISP)
	{
	//jmp dword ptr \|\| call dword ptr
	#ifdef DEBUG_COMMENTS
	distorm_format(&ProcessAccessHelp::decomposerCi, instruction, &inst);
	Scylla::debugLog.log(PRINTF_DWORD_PTR_FULL L" " PRINTF_DWORD_PTR_FULL L" %S %S %d %d - target address: " PRINTF_DWORD_PTR_FULL, (DWORD_PTR)instruction->addr, ImageBase, inst.mnemonic.p, inst.operands.p, instruction->ops[0].type, instruction->size, instruction->disp);
	#endif

	if (instruction->disp >= IatAddressVA && instruction->disp < (IatAddressVA + IatSize))
	{
	ref.targetPointer = (DWORD_PTR)instruction->disp;

	getIatEntryAddress(&ref);

	//Scylla::debugLog.log(L"iat entry "PRINTF_DWORD_PTR_FULL,ref.targetAddressInIat);

	iatReferenceList.push_back(ref);
	}
	}
	#endif
	}
	}
	}

	void IATReferenceScan::getIatEntryAddress( IATReference * ref )
	{
	if (!ProcessAccessHelp::readMemoryFromProcess(ref->targetPointer, sizeof(DWORD_PTR), &ref->targetAddressInIat))
	{
	ref->targetAddressInIat = 0;
	}
	}

	bool IATReferenceScan::isAddressValidImageMemory( DWORD_PTR address )
	{
	MEMORY_BASIC_INFORMATION memBasic = {0};

	if (!VirtualQueryEx(ProcessAccessHelp::hProcess, (LPCVOID)address, &memBasic, sizeof(MEMORY_BASIC_INFORMATION)))
	{
	return false;
	}

	return (memBasic.Type == MEM_IMAGE && isPageExecutable(memBasic.Protect));
	}

	void IATReferenceScan::patchReferenceInMemory( IATReference * ref )
	{
	DWORD_PTR newIatAddressPointer = ref->targetPointer - IatAddressVA + NewIatAddressRVA;

	DWORD patchBytes = 0;

	#ifdef _WIN64
	patchBytes = (DWORD)(newIatAddressPointer - ref->addressVA - 6);
	#else
	patchBytes = newIatAddressPointer;
	#endif
	ProcessAccessHelp::writeMemoryToProcess(ref->addressVA + 2, sizeof(DWORD), &patchBytes);
	}

	void IATReferenceScan::patchDirectImportInMemory( IATReference * ref )
	{
	DWORD patchBytes = 0;
	BYTE patchPreBytes[2];

	if (ref->targetPointer)
	{
	patchPreBytes[0] = 0xFF;

	if (ref->type == IAT_REFERENCE_DIRECT_CALL) //FF15
	{
	patchPreBytes[1] = 0x15;
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_JMP) //FF25
	{
	patchPreBytes[1] = 0x25;
	}
	else
	{
	return;
	}

	if (!JunkByteAfterInstruction)
	{
	ref->addressVA -= 1;
	}

	ProcessAccessHelp::writeMemoryToProcess(ref->addressVA, 2, patchPreBytes);

	#ifdef _WIN64
	patchBytes = (DWORD)(ref->targetPointer - ref->addressVA - 6);
	#else
	patchBytes = ref->targetPointer;
	#endif
	ProcessAccessHelp::writeMemoryToProcess(ref->addressVA + 2, sizeof(DWORD), &patchBytes);
	}
	}

	DWORD_PTR IATReferenceScan::lookUpIatForPointer( DWORD_PTR addr )
	{
	if (!iatBackup)
	{
	iatBackup = (DWORD_PTR *)calloc(IatSize + sizeof(DWORD_PTR), 1);
	if (!iatBackup)
	{
	return 0;
	}
	if (!ProcessAccessHelp::readMemoryFromProcess(IatAddressVA, IatSize, iatBackup))
	{
	free(iatBackup);
	iatBackup = 0;
	return 0;
	}
	}

	for (int i = 0; i < ((int)IatSize / (int)sizeof(DWORD_PTR));i++)
	{
	if (iatBackup[i] == addr)
	{
	return (DWORD_PTR)&iatBackup[i] - (DWORD_PTR)iatBackup + IatAddressVA;
	}
	}

	return 0;
	}

	void IATReferenceScan::patchNewIat(DWORD_PTR stdImagebase, DWORD_PTR newIatBaseAddress, PeParser * peParser)
	{
	NewIatAddressRVA = newIatBaseAddress;
	DWORD patchBytes = 0;

	for (std::vector<IATReference>::iterator iter = iatReferenceList.begin(); iter != iatReferenceList.end(); iter++)
	{
	IATReference * ref = &(*iter);

	DWORD_PTR newIatAddressPointer = (ref->targetPointer - IatAddressVA) + NewIatAddressRVA + stdImagebase;

	#ifdef _WIN64
	patchBytes = (DWORD)(newIatAddressPointer - (ref->addressVA - ImageBase + stdImagebase) - 6);
	#else
	patchBytes = newIatAddressPointer;
	#endif
	DWORD_PTR patchOffset = peParser->convertRVAToOffsetRelative(ref->addressVA - ImageBase);
	int index = peParser->convertRVAToOffsetVectorIndex(ref->addressVA - ImageBase);
	BYTE * memory = peParser->getSectionMemoryByIndex(index);
	DWORD memorySize = peParser->getSectionMemorySizeByIndex(index);


	if (memorySize < (DWORD)(patchOffset + 6))
	{
	Scylla::debugLog.log(L"Error - Cannot fix IAT reference RVA: " PRINTF_DWORD_PTR_FULL, ref->addressVA - ImageBase);
	}
	else
	{
	memory += patchOffset + 2;

	((DWORD )memory) = patchBytes;
	}
	//Scylla::debugLog.log(L"address %X old %X new %X",ref->addressVA, ref->targetPointer, newIatAddressPointer);

	}
	}

	void IATReferenceScan::printDirectImportLog()
	{
	IATReferenceScan::directImportLog.log(L"------------------------------------------------------------");
	IATReferenceScan::directImportLog.log(L"ImageBase " PRINTF_DWORD_PTR_FULL L" ImageSize %08X IATAddress " PRINTF_DWORD_PTR_FULL L" IATSize 0x%X", ImageBase, ImageSize, IatAddressVA, IatSize);
	int count = 0;
	bool isSuspect = false;

	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);

	ApiInfo * apiInfo = apiReader->getApiByVirtualAddress(ref->targetAddressInIat, &isSuspect);

	count++;
	WCHAR * type = L"U";

	if (ref->type == IAT_REFERENCE_DIRECT_CALL)
	{
	type = L"CALL";
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_JMP)
	{
	type = L"JMP";
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_MOV)
	{
	type = L"MOV";
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_PUSH)
	{
	type = L"PUSH";
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_LEA)
	{
	type = L"LEA";
	}

	IATReferenceScan::directImportLog.log(L"%04d AddrVA " PRINTF_DWORD_PTR_FULL L" Type %s Value " PRINTF_DWORD_PTR_FULL L" IatRefPointer " PRINTF_DWORD_PTR_FULL L" Api %s %S", count, ref->addressVA, type, ref->targetAddressInIat, ref->targetPointer,apiInfo->module->getFilename(), apiInfo->name);

	}

	IATReferenceScan::directImportLog.log(L"------------------------------------------------------------");
	}

	void IATReferenceScan::findDirectIatReferenceCallJmp( _DInst * instruction )
	{
	IATReference ref;

	if (META_GET_FC(instruction->meta) == FC_CALL \|\| META_GET_FC(instruction->meta) == FC_UNC_BRANCH)
	{
	if ((instruction->size >= 5) && (instruction->ops[0].type == O_PC)) //CALL/JMP 0x00000000
	{
	if (META_GET_FC(instruction->meta) == FC_CALL)
	{
	ref.type = IAT_REFERENCE_DIRECT_CALL;
	}
	else
	{
	ref.type = IAT_REFERENCE_DIRECT_JMP;
	}

	ref.targetAddressInIat = (DWORD_PTR)INSTRUCTION_GET_TARGET(instruction);

	checkMemoryRangeAndAddToList(&ref, instruction);
	}
	}
	}

	void IATReferenceScan::findDirectIatReferenceMov( _DInst * instruction )
	{
	IATReference ref;
	ref.type = IAT_REFERENCE_DIRECT_MOV;

	if (instruction->opcode == I_MOV)
	{
	#ifdef _WIN64
	if (instruction->size >= 7) //MOV REGISTER, 0xFFFFFFFFFFFFFFFF
	#else
	if (instruction->size >= 5) //MOV REGISTER, 0xFFFFFFFF
	#endif
	{
	if (instruction->ops[0].type == O_REG && instruction->ops[1].type == O_IMM)
	{
	ref.targetAddressInIat = (DWORD_PTR)instruction->imm.qword;

	checkMemoryRangeAndAddToList(&ref, instruction);
	}
	}
	}
	}

	void IATReferenceScan::findDirectIatReferencePush( _DInst * instruction )
	{
	IATReference ref;
	ref.type = IAT_REFERENCE_DIRECT_PUSH;

	if (instruction->size >= 5 && instruction->opcode == I_PUSH)
	{
	ref.targetAddressInIat = (DWORD_PTR)instruction->imm.qword;

	checkMemoryRangeAndAddToList(&ref, instruction);
	}
	}

	void IATReferenceScan::findDirectIatReferenceLea( _DInst * instruction )
	{
	IATReference ref;
	ref.type = IAT_REFERENCE_DIRECT_LEA;

	if (instruction->size >= 5 && instruction->opcode == I_LEA)
	{
	if (instruction->ops[0].type == O_REG && instruction->ops[1].type == O_DISP) //LEA EDX, [0xb58bb8]
	{
	ref.targetAddressInIat = (DWORD_PTR)instruction->disp;

	checkMemoryRangeAndAddToList(&ref, instruction);
	}
	}
	}

	void IATReferenceScan::checkMemoryRangeAndAddToList( IATReference * ref, _DInst * instruction )
	{
	#ifdef DEBUG_COMMENTS
	_DecodedInst inst;
	#endif

	if (ref->targetAddressInIat > 0x000FFFFF && ref->targetAddressInIat != (DWORD_PTR)-1)
	{
	if ((ref->targetAddressInIat < ImageBase) \|\| (ref->targetAddressInIat > (ImageBase+ImageSize))) //outside pe image
	{
	//if (isAddressValidImageMemory(ref->targetAddressInIat))
	{
	bool isSuspect = false;
	if (apiReader->getApiByVirtualAddress(ref->targetAddressInIat, &isSuspect) != 0)
	{
	ref->addressVA = (DWORD_PTR)instruction->addr;
	ref->instructionSize = instruction->size;
	ref->targetPointer = lookUpIatForPointer(ref->targetAddressInIat);

	#ifdef DEBUG_COMMENTS
	distorm_format(&ProcessAccessHelp::decomposerCi, instruction, &inst);
	Scylla::debugLog.log(PRINTF_DWORD_PTR_FULL L" " PRINTF_DWORD_PTR_FULL L" %S %S %d %d - target address: " PRINTF_DWORD_PTR_FULL,(DWORD_PTR)instruction->addr, ImageBase, inst.mnemonic.p, inst.operands.p, instruction->ops[0].type, instruction->size, ref->targetAddressInIat);
	#endif
	iatDirectImportList.push_back(*ref);
	}
	}
	}
	}
	}

	void IATReferenceScan::patchDirectJumpTableEntry(DWORD_PTR targetIatPointer, DWORD_PTR stdImagebase, DWORD directImportsJumpTableRVA, PeParser * peParser, BYTE * jmpTableMemory, DWORD newIatBase )
	{
	DWORD patchBytes = 0;
	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);

	//only one jmp in table for different direct imports with same iat address
	if (ref->targetPointer == targetIatPointer)
	{
	//patch dump
	DWORD patchOffset = (DWORD)peParser->convertRVAToOffsetRelative(ref->addressVA - ImageBase);
	int index = peParser->convertRVAToOffsetVectorIndex(ref->addressVA - ImageBase);
	BYTE * memory = peParser->getSectionMemoryByIndex(index);
	DWORD memorySize = peParser->getSectionMemorySizeByIndex(index);
	DWORD sectionRVA = peParser->getSectionAddressRVAByIndex(index);

	if (ref->type == IAT_REFERENCE_DIRECT_CALL \|\| ref->type == IAT_REFERENCE_DIRECT_JMP)
	{
	#ifndef _WIN64
	if (ref->instructionSize == 5)
	{
	patchBytes = directImportsJumpTableRVA - (ref->addressVA - ImageBase) - 5;
	patchDirectImportInDump32(1, 5, patchBytes, memory, memorySize, false, patchOffset, sectionRVA);
	}
	#endif
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_PUSH \|\| ref->type == IAT_REFERENCE_DIRECT_MOV)
	{
	#ifndef _WIN64
	if (ref->instructionSize == 5) //for x86
	{
	patchBytes = directImportsJumpTableRVA + stdImagebase;
	patchDirectImportInDump32(1, 5, patchBytes, memory, memorySize, true, patchOffset, sectionRVA);
	}
	#else
	if (ref->instructionSize == 10) //for x64
	{
	DWORD_PTR patchBytes64 = directImportsJumpTableRVA + stdImagebase;
	patchDirectImportInDump64(2, 10, patchBytes64, memory, memorySize, true, patchOffset, sectionRVA);
	}
	#endif
	}
	else if (ref->type == IAT_REFERENCE_DIRECT_LEA)
	{
	#ifndef _WIN64
	if (ref->instructionSize == 6)
	{
	patchBytes = directImportsJumpTableRVA + stdImagebase;
	patchDirectImportInDump32(2, 6, patchBytes, memory, memorySize, true, patchOffset, sectionRVA);
	}
	#endif
	}
	}
	}
	}

	void IATReferenceScan::patchDirectJumpTable( DWORD_PTR stdImagebase, DWORD directImportsJumpTableRVA, PeParser * peParser, BYTE * jmpTableMemory, DWORD newIatBase )
	{

	std::set<DWORD_PTR> apiPointers;
	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);
	apiPointers.insert(ref->targetPointer);
	}

	DWORD patchBytes;

	for (std::set<DWORD_PTR>::iterator apiIter = apiPointers.begin(); apiIter != apiPointers.end(); apiIter++)
	{
	DWORD_PTR refTargetPointer = *apiIter;
	if (newIatBase) //create new iat in section
	{
	refTargetPointer = (*apiIter - IatAddressVA) + newIatBase + ImageBase;
	}
	//create jump table in section
	DWORD_PTR newIatAddressPointer = refTargetPointer - ImageBase + stdImagebase;

	#ifdef _WIN64
	patchBytes = (DWORD)(newIatAddressPointer - (directImportsJumpTableRVA + stdImagebase) - 6);
	#else
	patchBytes = newIatAddressPointer; //dont forget relocation here
	directImportLog.log(L"Relocation direct imports fix: Base RVA %08X Offset %04X Type IMAGE_REL_BASED_HIGHLOW", (directImportsJumpTableRVA + 2) & 0xFFFFF000, (directImportsJumpTableRVA + 2) & 0x00000FFF);
	#endif
	jmpTableMemory[0] = 0xFF;
	jmpTableMemory[1] = 0x25;
	((DWORD )&jmpTableMemory[2]) = patchBytes;

	patchDirectJumpTableEntry(*apiIter, stdImagebase, directImportsJumpTableRVA, peParser, jmpTableMemory, newIatBase);

	jmpTableMemory += 6;
	directImportsJumpTableRVA += 6;
	}



	}

	void IATReferenceScan::patchDirectImportInDump32( int patchPreFixBytes, int instructionSize, DWORD patchBytes, BYTE * memory, DWORD memorySize, bool generateReloc, DWORD patchOffset, DWORD sectionRVA )
	{
	if (memorySize < (DWORD)(patchOffset + instructionSize))
	{
	Scylla::debugLog.log(L"Error - Cannot fix direct import reference RVA: %X", sectionRVA + patchOffset);
	}
	else
	{
	memory += patchOffset + patchPreFixBytes;
	if (generateReloc)
	{
	directImportLog.log(L"Relocation direct imports fix: Base RVA %08X Offset %04X Type IMAGE_REL_BASED_HIGHLOW", (sectionRVA + patchOffset + patchPreFixBytes) & 0xFFFFF000, (sectionRVA + patchOffset+ patchPreFixBytes) & 0x00000FFF);
	}

	((DWORD )memory) = patchBytes;
	}
	}

	void IATReferenceScan::patchDirectImportInDump64( int patchPreFixBytes, int instructionSize, DWORD_PTR patchBytes, BYTE * memory, DWORD memorySize, bool generateReloc, DWORD patchOffset, DWORD sectionRVA )
	{
	if (memorySize < (DWORD)(patchOffset + instructionSize))
	{
	Scylla::debugLog.log(L"Error - Cannot fix direct import reference RVA: %X", sectionRVA + patchOffset);
	}
	else
	{
	memory += patchOffset + patchPreFixBytes;
	if (generateReloc)
	{
	directImportLog.log(L"Relocation direct imports fix: Base RVA %08X Offset %04X Type IMAGE_REL_BASED_DIR64", (sectionRVA + patchOffset + patchPreFixBytes) & 0xFFFFF000, (sectionRVA + patchOffset+ patchPreFixBytes) & 0x00000FFF);
	}

	((DWORD_PTR )memory) = patchBytes;
	}
	}

	DWORD IATReferenceScan::addAdditionalApisToList()
	{
	std::set<DWORD_PTR> apiPointers;

	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);

	if (ref->targetPointer == 0)
	{
	apiPointers.insert(ref->targetAddressInIat);
	}
	}

	DWORD_PTR iatAddy = IatAddressVA + IatSize;
	DWORD newIatSize = IatSize;

	bool isSuspect = false;
	for (std::set<DWORD_PTR>::iterator apiIter = apiPointers.begin(); apiIter != apiPointers.end(); apiIter++)
	{
	for (std::vector<IATReference>::iterator iter = iatDirectImportList.begin(); iter != iatDirectImportList.end(); iter++)
	{
	IATReference * ref = &(*iter);

	if (ref->targetPointer == 0 && ref->targetAddressInIat == *apiIter)
	{
	ref->targetPointer = iatAddy;
	ApiInfo * apiInfo = apiReader->getApiByVirtualAddress(ref->targetAddressInIat, &isSuspect);
	apiReader->addFoundApiToModuleList(iatAddy, apiInfo, true, isSuspect);
	}
	}

	iatAddy += sizeof(DWORD_PTR);
	newIatSize += sizeof(DWORD_PTR);
	}

	return newIatSize;
	}

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