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diff --git a/Scylla/PeParser.cpp b/Scylla/PeParser.cpp
index 39996fe..9975e71 100644
--- a/Scylla/PeParser.cpp
+++ b/Scylla/PeParser.cpp
@@ -1,1206 +1,1218 @@
#include "PeParser.h"
#include "ProcessAccessHelp.h"
#include <algorithm>
#include <imagehlp.h>
#pragma comment(lib, "Imagehlp.lib")
PeParser::PeParser()
{
initClass();
}
PeParser::PeParser(const WCHAR * file, bool readSectionHeaders)
{
initClass();
filename = file;
if (filename && wcslen(filename) > 3)
{
readPeHeaderFromFile(readSectionHeaders);
if (readSectionHeaders)
{
if (isValidPeFile())
{
getSectionHeaders();
}
}
}
}
PeParser::PeParser(const DWORD_PTR moduleBase, bool readSectionHeaders)
{
initClass();
moduleBaseAddress = moduleBase;
if (moduleBaseAddress)
{
readPeHeaderFromProcess(readSectionHeaders);
if (readSectionHeaders)
{
if (isValidPeFile())
{
getSectionHeaders();
}
}
}
}
PeParser::~PeParser()
{
if (headerMemory)
{
delete [] headerMemory;
}
if (fileMemory)
{
delete [] fileMemory;
}
for (size_t i = 0; i < listPeSection.size(); i++)
{
if (listPeSection[i].data)
{
delete [] listPeSection[i].data;
}
}
listPeSection.clear();
}
void PeParser::initClass()
{
fileMemory = 0;
headerMemory = 0;
pDosHeader = 0;
pDosStub = 0;
dosStubSize = 0;
pNTHeader32 = 0;
pNTHeader64 = 0;
overlayData = 0;
overlaySize = 0;
filename = 0;
fileSize = 0;
moduleBaseAddress = 0;
hFile = INVALID_HANDLE_VALUE;
}
bool PeParser::isPE64()
{
if (isValidPeFile())
{
return (pNTHeader32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC);
}
else
{
return false;
}
}
bool PeParser::isPE32()
{
if (isValidPeFile())
{
return (pNTHeader32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC);
}
else
{
return false;
}
}
bool PeParser::isTargetFileSamePeFormat()
{
#ifdef _WIN64
return isPE64();
#else
return isPE32();
#endif
}
bool PeParser::isValidPeFile()
{
bool retValue = false;
if (pDosHeader)
{
if (pDosHeader->e_magic == IMAGE_DOS_SIGNATURE)
{
if (pNTHeader32)
{
if (pNTHeader32->Signature == IMAGE_NT_SIGNATURE)
{
retValue = true;
}
}
}
}
return retValue;
}
bool PeParser::hasDirectory(const int directoryIndex)
{
if (isPE32())
{
return (pNTHeader32->OptionalHeader.DataDirectory[directoryIndex].VirtualAddress != 0);
}
else if (isPE64())
{
return (pNTHeader64->OptionalHeader.DataDirectory[directoryIndex].VirtualAddress != 0);
}
else
{
return false;
}
}
bool PeParser::hasExportDirectory()
{
return hasDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT);
}
bool PeParser::hasTLSDirectory()
{
return hasDirectory(IMAGE_DIRECTORY_ENTRY_TLS);
}
bool PeParser::hasRelocationDirectory()
{
return hasDirectory(IMAGE_DIRECTORY_ENTRY_BASERELOC);
}
DWORD PeParser::getEntryPoint()
{
if (isPE32())
{
return pNTHeader32->OptionalHeader.AddressOfEntryPoint;
}
else if (isPE64())
{
return pNTHeader64->OptionalHeader.AddressOfEntryPoint;
}
else
{
return 0;
}
}
bool PeParser::readPeHeaderFromProcess(bool readSectionHeaders)
{
bool retValue = false;
DWORD correctSize = 0;
DWORD readSize = getInitialHeaderReadSize(readSectionHeaders);
headerMemory = new BYTE[readSize];
if (ProcessAccessHelp::readMemoryPartlyFromProcess(moduleBaseAddress, readSize, headerMemory))
{
retValue = true;
getDosAndNtHeader(headerMemory, (LONG)readSize);
if (isValidPeFile())
{
correctSize = calcCorrectPeHeaderSize(readSectionHeaders);
if (readSize < correctSize)
{
readSize = correctSize;
delete [] headerMemory;
headerMemory = new BYTE[readSize];
if (ProcessAccessHelp::readMemoryPartlyFromProcess(moduleBaseAddress, readSize, headerMemory))
{
getDosAndNtHeader(headerMemory, (LONG)readSize);
}
}
}
}
return retValue;
}
bool PeParser::readPeHeaderFromFile(bool readSectionHeaders)
{
bool retValue = false;
DWORD correctSize = 0;
DWORD numberOfBytesRead = 0;
DWORD readSize = getInitialHeaderReadSize(readSectionHeaders);
headerMemory = new BYTE[readSize];
if (openFileHandle())
{
fileSize = (DWORD)ProcessAccessHelp::getFileSize(hFile);
if (ReadFile(hFile, headerMemory, readSize, &numberOfBytesRead, 0))
{
retValue = true;
getDosAndNtHeader(headerMemory, (LONG)readSize);
if (isValidPeFile())
{
correctSize = calcCorrectPeHeaderSize(readSectionHeaders);
if (readSize < correctSize)
{
readSize = correctSize;
if (fileSize > 0)
{
if (fileSize < correctSize)
{
readSize = fileSize;
}
}
delete [] headerMemory;
headerMemory = new BYTE[readSize];
SetFilePointer(hFile, 0, 0, FILE_BEGIN);
if (ReadFile(hFile, headerMemory, readSize, &numberOfBytesRead, 0))
{
getDosAndNtHeader(headerMemory, (LONG)readSize);
}
}
}
}
closeFileHandle();
}
return retValue;
}
bool PeParser::readPeSectionsFromProcess()
{
bool retValue = true;
DWORD_PTR readOffset = 0;
listPeSection.reserve(getNumberOfSections());
for (WORD i = 0; i < getNumberOfSections(); i++)
{
readOffset = listPeSection[i].sectionHeader.VirtualAddress + moduleBaseAddress;
listPeSection[i].normalSize = listPeSection[i].sectionHeader.Misc.VirtualSize;
if (!readSectionFromProcess(readOffset, listPeSection[i]))
{
retValue = false;
}
}
return retValue;
}
bool PeParser::readPeSectionsFromFile()
{
bool retValue = true;
DWORD readOffset = 0;
listPeSection.reserve(getNumberOfSections());
if (openFileHandle())
{
for (WORD i = 0; i < getNumberOfSections(); i++)
{
readOffset = listPeSection[i].sectionHeader.PointerToRawData;
listPeSection[i].normalSize = listPeSection[i].sectionHeader.SizeOfRawData;
if (!readSectionFromFile(readOffset, listPeSection[i]))
{
retValue = false;
}
}
closeFileHandle();
}
else
{
retValue = false;
}
return retValue;
}
bool PeParser::getSectionHeaders()
{
PIMAGE_SECTION_HEADER pSection = IMAGE_FIRST_SECTION(pNTHeader32);
PeFileSection peFileSection;
listPeSection.clear();
listPeSection.reserve(getNumberOfSections());
for (WORD i = 0; i < getNumberOfSections(); i++)
{
memcpy_s(&peFileSection.sectionHeader, sizeof(IMAGE_SECTION_HEADER), pSection, sizeof(IMAGE_SECTION_HEADER));
listPeSection.push_back(peFileSection);
pSection++;
}
return true;
}
bool PeParser::getSectionNameUnicode(const int sectionIndex, WCHAR * output, const int outputLen)
{
CHAR sectionNameA[IMAGE_SIZEOF_SHORT_NAME + 1] = {0};
output[0] = 0;
memcpy(sectionNameA, listPeSection[sectionIndex].sectionHeader.Name, IMAGE_SIZEOF_SHORT_NAME); //not null terminated
return (swprintf_s(output, outputLen, L"%S", sectionNameA) != -1);
}
WORD PeParser::getNumberOfSections()
{
return pNTHeader32->FileHeader.NumberOfSections;
}
void PeParser::setNumberOfSections(WORD numberOfSections)
{
pNTHeader32->FileHeader.NumberOfSections = numberOfSections;
}
std::vector<PeFileSection> & PeParser::getSectionHeaderList()
{
return listPeSection;
}
void PeParser::getDosAndNtHeader(BYTE * memory, LONG size)
{
pDosHeader = (PIMAGE_DOS_HEADER)memory;
pNTHeader32 = 0;
pNTHeader64 = 0;
dosStubSize = 0;
pDosStub = 0;
if (pDosHeader->e_lfanew > 0 && pDosHeader->e_lfanew < size) //malformed PE
{
pNTHeader32 = (PIMAGE_NT_HEADERS32)((DWORD_PTR)pDosHeader + pDosHeader->e_lfanew);
pNTHeader64 = (PIMAGE_NT_HEADERS64)((DWORD_PTR)pDosHeader + pDosHeader->e_lfanew);
if (pDosHeader->e_lfanew > sizeof(IMAGE_DOS_HEADER))
{
dosStubSize = pDosHeader->e_lfanew - sizeof(IMAGE_DOS_HEADER);
pDosStub = (BYTE *)((DWORD_PTR)pDosHeader + sizeof(IMAGE_DOS_HEADER));
}
}
}
DWORD PeParser::calcCorrectPeHeaderSize(bool readSectionHeaders)
{
DWORD correctSize = pDosHeader->e_lfanew + 50; //extra buffer
if (readSectionHeaders)
{
correctSize += getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER);
}
if (isPE32())
{
correctSize += sizeof(IMAGE_NT_HEADERS32);
}
else if(isPE64())
{
correctSize += sizeof(IMAGE_NT_HEADERS64);
}
else
{
correctSize = 0; //not a valid PE
}
return correctSize;
}
DWORD PeParser::getInitialHeaderReadSize(bool readSectionHeaders)
{
DWORD readSize = sizeof(IMAGE_DOS_HEADER) + 200 + sizeof(IMAGE_NT_HEADERS64);
if (readSectionHeaders)
{
readSize += (10 * sizeof(IMAGE_SECTION_HEADER));
}
return readSize;
}
DWORD PeParser::getSectionHeaderBasedFileSize()
{
DWORD lastRawOffset = 0, lastRawSize = 0;
//this is needed if the sections aren't sorted by their RawOffset (e.g. Petite)
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if (listPeSection[i].sectionHeader.PointerToRawData > lastRawOffset)
{
lastRawOffset = listPeSection[i].sectionHeader.PointerToRawData;
lastRawSize = listPeSection[i].sectionHeader.SizeOfRawData;
}
}
return (lastRawSize + lastRawOffset);
}
DWORD PeParser::getSectionHeaderBasedSizeOfImage()
{
DWORD lastVirtualOffset = 0, lastVirtualSize = 0;
//this is needed if the sections aren't sorted by their RawOffset (e.g. Petite)
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if (listPeSection[i].sectionHeader.VirtualAddress > lastVirtualOffset)
{
lastVirtualOffset = listPeSection[i].sectionHeader.VirtualAddress;
lastVirtualSize = listPeSection[i].sectionHeader.Misc.VirtualSize;
}
}
return (lastVirtualSize + lastVirtualOffset);
}
bool PeParser::openFileHandle()
{
if (hFile == INVALID_HANDLE_VALUE)
{
if (filename)
{
hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
}
else
{
hFile = INVALID_HANDLE_VALUE;
}
}
return (hFile != INVALID_HANDLE_VALUE);
}
bool PeParser::openWriteFileHandle( const WCHAR * newFile )
{
if (newFile)
{
hFile = CreateFile(newFile, GENERIC_WRITE, FILE_SHARE_WRITE, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
}
else
{
hFile = INVALID_HANDLE_VALUE;
}
return (hFile != INVALID_HANDLE_VALUE);
}
void PeParser::closeFileHandle()
{
if (hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(hFile);
hFile = INVALID_HANDLE_VALUE;
}
}
bool PeParser::readSectionFromProcess(const DWORD_PTR readOffset, PeFileSection & peFileSection)
{
return readSectionFrom(readOffset, peFileSection, true); //process
}
bool PeParser::readSectionFromFile(const DWORD readOffset, PeFileSection & peFileSection)
{
return readSectionFrom(readOffset, peFileSection, false); //file
}
bool PeParser::readSectionFrom(const DWORD_PTR readOffset, PeFileSection & peFileSection, const bool isProcess)
{
const DWORD maxReadSize = 100;
DWORD currentReadSize;
BYTE data[maxReadSize];
bool retValue = true;
DWORD valuesFound = 0;
DWORD readSize = 0;
DWORD_PTR currentOffset = 0;
peFileSection.data = 0;
peFileSection.dataSize = 0;
readSize = peFileSection.normalSize;
if (!readOffset || !readSize)
{
return true; //section without data is valid
}
if (readSize <= maxReadSize)
{
peFileSection.dataSize = readSize;
peFileSection.normalSize = readSize;
if (isProcess)
{
return readPeSectionFromProcess(readOffset, peFileSection);
}
else
{
return readPeSectionFromFile((DWORD)readOffset, peFileSection);
}
}
currentReadSize = readSize % maxReadSize; //alignment %
if (!currentReadSize)
{
currentReadSize = maxReadSize;
}
currentOffset = readOffset + readSize - currentReadSize;
while(currentOffset >= readOffset) //start from the end
{
ZeroMemory(data, currentReadSize);
if (isProcess)
{
retValue = ProcessAccessHelp::readMemoryPartlyFromProcess(currentOffset, currentReadSize, data);
}
else
{
retValue = ProcessAccessHelp::readMemoryFromFile(hFile, (LONG)currentOffset, currentReadSize, data);
}
if (!retValue)
{
break;
}
valuesFound = isMemoryNotNull(data, currentReadSize);
if (valuesFound)
{
//found some real code
currentOffset += valuesFound;
if (readOffset < currentOffset)
{
//real size
peFileSection.dataSize = (DWORD)(currentOffset - readOffset);
}
break;
}
currentReadSize = maxReadSize;
currentOffset -= currentReadSize;
}
if (peFileSection.dataSize)
{
if (isProcess)
{
retValue = readPeSectionFromProcess(readOffset, peFileSection);
}
else
{
retValue = readPeSectionFromFile((DWORD)readOffset, peFileSection);
}
}
return retValue;
}
DWORD PeParser::isMemoryNotNull( BYTE * data, int dataSize )
{
for (int i = (dataSize - 1); i >= 0; i--)
{
if (data[i] != 0)
{
return i + 1;
}
}
return 0;
}
bool PeParser::savePeFileToDisk( const WCHAR * newFile )
{
bool retValue = true;
DWORD dwFileOffset = 0, dwWriteSize = 0;
if (getNumberOfSections() != listPeSection.size())
{
return false;
}
if (openWriteFileHandle(newFile))
{
//Dos header
dwWriteSize = sizeof(IMAGE_DOS_HEADER);
if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, pDosHeader))
{
retValue = false;
}
dwFileOffset += dwWriteSize;
if (dosStubSize && pDosStub)
{
//Dos Stub
dwWriteSize = dosStubSize;
if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, pDosStub))
{
retValue = false;
}
dwFileOffset += dwWriteSize;
}
//Pe Header
if (isPE32())
{
dwWriteSize = sizeof(IMAGE_NT_HEADERS32);
}
else
{
dwWriteSize = sizeof(IMAGE_NT_HEADERS64);
}
if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, pNTHeader32))
{
retValue = false;
}
dwFileOffset += dwWriteSize;
//section headers
dwWriteSize = sizeof(IMAGE_SECTION_HEADER);
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, &listPeSection[i].sectionHeader))
{
retValue = false;
break;
}
dwFileOffset += dwWriteSize;
}
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if (!listPeSection[i].sectionHeader.PointerToRawData)
continue;
if (listPeSection[i].sectionHeader.PointerToRawData > dwFileOffset)
{
dwWriteSize = listPeSection[i].sectionHeader.PointerToRawData - dwFileOffset; //padding
if (!writeZeroMemoryToFile(hFile, dwFileOffset, dwWriteSize))
{
retValue = false;
break;
}
dwFileOffset += dwWriteSize;
}
dwWriteSize = listPeSection[i].dataSize;
if (dwWriteSize)
{
if (!ProcessAccessHelp::writeMemoryToFile(hFile, listPeSection[i].sectionHeader.PointerToRawData, dwWriteSize, listPeSection[i].data))
{
retValue = false;
break;
}
dwFileOffset += dwWriteSize;
if (listPeSection[i].dataSize < listPeSection[i].sectionHeader.SizeOfRawData) //padding
{
dwWriteSize = listPeSection[i].sectionHeader.SizeOfRawData - listPeSection[i].dataSize;
if (!writeZeroMemoryToFile(hFile, dwFileOffset, dwWriteSize))
{
retValue = false;
break;
}
dwFileOffset += dwWriteSize;
}
}
}
//add overlay?
if (overlaySize && overlayData)
{
dwWriteSize = overlaySize;
if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, overlayData))
{
retValue = false;
}
dwFileOffset += dwWriteSize;
}
SetEndOfFile(hFile);
closeFileHandle();
}
return retValue;
}
bool PeParser::writeZeroMemoryToFile(HANDLE hFile, DWORD fileOffset, DWORD size)
{
bool retValue = false;
PVOID zeromemory = calloc(size, 1);
if (zeromemory)
{
retValue = ProcessAccessHelp::writeMemoryToFile(hFile, fileOffset, size, zeromemory);
free(zeromemory);
}
return retValue;
}
void PeParser::removeDosStub()
{
if (pDosHeader)
{
dosStubSize = 0;
pDosStub = 0; //must not delete []
pDosHeader->e_lfanew = sizeof(IMAGE_DOS_HEADER);
}
}
bool PeParser::readPeSectionFromFile(DWORD readOffset, PeFileSection & peFileSection)
{
DWORD bytesRead = 0;
peFileSection.data = new BYTE[peFileSection.dataSize];
SetFilePointer(hFile, readOffset, 0, FILE_BEGIN);
return (ReadFile(hFile, peFileSection.data, peFileSection.dataSize, &bytesRead, 0) != FALSE);
}
bool PeParser::readPeSectionFromProcess(DWORD_PTR readOffset, PeFileSection & peFileSection)
{
peFileSection.data = new BYTE[peFileSection.dataSize];
return ProcessAccessHelp::readMemoryPartlyFromProcess(readOffset, peFileSection.dataSize, peFileSection.data);
}
DWORD PeParser::alignValue(DWORD badValue, DWORD alignTo)
{
return (((badValue + alignTo - 1) / alignTo) * alignTo);
}
bool PeParser::addNewLastSection(const CHAR * sectionName, DWORD sectionSize, BYTE * sectionData)
{
size_t nameLength = strlen(sectionName);
DWORD fileAlignment = 0, sectionAlignment = 0;
PeFileSection peFileSection;
if (nameLength > IMAGE_SIZEOF_SHORT_NAME)
{
return false;
}
if (isPE32())
{
fileAlignment = pNTHeader32->OptionalHeader.FileAlignment;
sectionAlignment = pNTHeader32->OptionalHeader.SectionAlignment;
}
else
{
fileAlignment = pNTHeader64->OptionalHeader.FileAlignment;
sectionAlignment = pNTHeader64->OptionalHeader.SectionAlignment;
}
memcpy_s(peFileSection.sectionHeader.Name, IMAGE_SIZEOF_SHORT_NAME, sectionName, nameLength);
//last section doesn't need SizeOfRawData alignment
peFileSection.sectionHeader.SizeOfRawData = sectionSize; //alignValue(sectionSize, fileAlignment);
peFileSection.sectionHeader.Misc.VirtualSize = alignValue(sectionSize, sectionAlignment);
peFileSection.sectionHeader.PointerToRawData = alignValue(getSectionHeaderBasedFileSize(), fileAlignment);
peFileSection.sectionHeader.VirtualAddress = alignValue(getSectionHeaderBasedSizeOfImage(), sectionAlignment);
peFileSection.sectionHeader.Characteristics = IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA;
peFileSection.normalSize = peFileSection.sectionHeader.SizeOfRawData;
peFileSection.dataSize = peFileSection.sectionHeader.SizeOfRawData;
if (sectionData == 0)
{
peFileSection.data = new BYTE[peFileSection.sectionHeader.SizeOfRawData];
ZeroMemory(peFileSection.data , peFileSection.sectionHeader.SizeOfRawData);
}
else
{
peFileSection.data = sectionData;
}
listPeSection.push_back(peFileSection);
setNumberOfSections(getNumberOfSections() + 1);
return true;
}
int PeParser::convertRVAToOffsetVectorIndex(DWORD_PTR dwRVA)
{
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if ((listPeSection[i].sectionHeader.VirtualAddress <= dwRVA) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > dwRVA))
{
return i;
}
}
return -1;
}
DWORD_PTR PeParser::convertRVAToOffsetVector(DWORD_PTR dwRVA)
{
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if ((listPeSection[i].sectionHeader.VirtualAddress <= dwRVA) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > dwRVA))
{
return ((dwRVA - listPeSection[i].sectionHeader.VirtualAddress) + listPeSection[i].sectionHeader.PointerToRawData);
}
}
return 0;
}
DWORD_PTR PeParser::convertOffsetToRVAVector(DWORD_PTR dwOffset)
{
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if ((listPeSection[i].sectionHeader.PointerToRawData <= dwOffset) && ((listPeSection[i].sectionHeader.PointerToRawData + listPeSection[i].sectionHeader.SizeOfRawData) > dwOffset))
{
return ((dwOffset - listPeSection[i].sectionHeader.PointerToRawData) + listPeSection[i].sectionHeader.VirtualAddress);
}
}
return 0;
}
void PeParser::fixPeHeader()
{
DWORD dwSize = pDosHeader->e_lfanew + sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER);
if (isPE32())
{
//delete bound import directories
pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].VirtualAddress = 0;
pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].Size = 0;
- //max 16
+ //max 16, zeroing possible garbage values
+ for (DWORD i = pNTHeader32->OptionalHeader.NumberOfRvaAndSizes; i < IMAGE_NUMBEROF_DIRECTORY_ENTRIES; i++)
+ {
+ pNTHeader32->OptionalHeader.DataDirectory[i].Size = 0;
+ pNTHeader32->OptionalHeader.DataDirectory[i].VirtualAddress = 0;
+ }
+
pNTHeader32->OptionalHeader.NumberOfRvaAndSizes = IMAGE_NUMBEROF_DIRECTORY_ENTRIES;
pNTHeader32->FileHeader.SizeOfOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER32);
pNTHeader32->OptionalHeader.SizeOfImage = getSectionHeaderBasedSizeOfImage();
if (moduleBaseAddress)
{
pNTHeader32->OptionalHeader.ImageBase = (DWORD)moduleBaseAddress;
}
pNTHeader32->OptionalHeader.SizeOfHeaders = alignValue(dwSize + pNTHeader32->FileHeader.SizeOfOptionalHeader + (getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER)), pNTHeader32->OptionalHeader.FileAlignment);
}
else
{
//delete bound import directories
pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].VirtualAddress = 0;
pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].Size = 0;
- //max 16
+ //max 16, zeroing possible garbage values
+ for (DWORD i = pNTHeader64->OptionalHeader.NumberOfRvaAndSizes; i < IMAGE_NUMBEROF_DIRECTORY_ENTRIES; i++)
+ {
+ pNTHeader64->OptionalHeader.DataDirectory[i].Size = 0;
+ pNTHeader64->OptionalHeader.DataDirectory[i].VirtualAddress = 0;
+ }
+
pNTHeader64->OptionalHeader.NumberOfRvaAndSizes = IMAGE_NUMBEROF_DIRECTORY_ENTRIES;
pNTHeader64->FileHeader.SizeOfOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER64);
pNTHeader64->OptionalHeader.SizeOfImage = getSectionHeaderBasedSizeOfImage();
if (moduleBaseAddress)
{
pNTHeader64->OptionalHeader.ImageBase = moduleBaseAddress;
}
pNTHeader64->OptionalHeader.SizeOfHeaders = alignValue(dwSize + pNTHeader64->FileHeader.SizeOfOptionalHeader + (getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER)), pNTHeader64->OptionalHeader.FileAlignment);
}
removeIatDirectory();
}
void PeParser::removeIatDirectory()
{
DWORD searchAddress = 0;
if (isPE32())
{
searchAddress = pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress;
pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress = 0;
pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].Size = 0;
}
else
{
searchAddress = pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress;
pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress = 0;
pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].Size = 0;
}
if (searchAddress)
{
for (WORD i = 0; i < getNumberOfSections(); i++)
{
if ((listPeSection[i].sectionHeader.VirtualAddress <= searchAddress) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > searchAddress))
{
//section must be read and writable
listPeSection[i].sectionHeader.Characteristics |= IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE;
}
}
}
}
void PeParser::setDefaultFileAlignment()
{
if (isPE32())
{
pNTHeader32->OptionalHeader.FileAlignment = FileAlignmentConstant;
}
else
{
pNTHeader64->OptionalHeader.FileAlignment = FileAlignmentConstant;
}
}
bool PeFileSectionSortByPointerToRawData(const PeFileSection& d1, const PeFileSection& d2)
{
return d1.sectionHeader.PointerToRawData < d2.sectionHeader.PointerToRawData;
}
bool PeFileSectionSortByVirtualAddress(const PeFileSection& d1, const PeFileSection& d2)
{
return d1.sectionHeader.VirtualAddress < d2.sectionHeader.VirtualAddress;
}
void PeParser::alignAllSectionHeaders()
{
DWORD sectionAlignment = 0;
DWORD fileAlignment = 0;
DWORD newFileSize = 0;
if (isPE32())
{
sectionAlignment = pNTHeader32->OptionalHeader.SectionAlignment;
fileAlignment = pNTHeader32->OptionalHeader.FileAlignment;
}
else
{
sectionAlignment = pNTHeader64->OptionalHeader.SectionAlignment;
fileAlignment = pNTHeader64->OptionalHeader.FileAlignment;
}
std::sort(listPeSection.begin(), listPeSection.end(), PeFileSectionSortByPointerToRawData); //sort by PointerToRawData ascending
newFileSize = pDosHeader->e_lfanew + sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER) + pNTHeader32->FileHeader.SizeOfOptionalHeader + (getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER));
for (WORD i = 0; i < getNumberOfSections(); i++)
{
listPeSection[i].sectionHeader.VirtualAddress = alignValue(listPeSection[i].sectionHeader.VirtualAddress, sectionAlignment);
listPeSection[i].sectionHeader.Misc.VirtualSize = alignValue(listPeSection[i].sectionHeader.Misc.VirtualSize, sectionAlignment);
listPeSection[i].sectionHeader.PointerToRawData = alignValue(newFileSize, fileAlignment);
listPeSection[i].sectionHeader.SizeOfRawData = alignValue(listPeSection[i].dataSize, fileAlignment);
newFileSize = listPeSection[i].sectionHeader.PointerToRawData + listPeSection[i].sectionHeader.SizeOfRawData;
}
std::sort(listPeSection.begin(), listPeSection.end(), PeFileSectionSortByVirtualAddress); //sort by VirtualAddress ascending
}
bool PeParser::dumpProcess(DWORD_PTR modBase, DWORD_PTR entryPoint, const WCHAR * dumpFilePath)
{
moduleBaseAddress = modBase;
if (readPeSectionsFromProcess())
{
setDefaultFileAlignment();
setEntryPointVa(entryPoint);
alignAllSectionHeaders();
fixPeHeader();
getFileOverlay();
return savePeFileToDisk(dumpFilePath);
}
return false;
}
bool PeParser::dumpProcess(DWORD_PTR modBase, DWORD_PTR entryPoint, const WCHAR * dumpFilePath, std::vector<PeSection> & sectionList)
{
if (listPeSection.size() == sectionList.size())
{
for (int i = (getNumberOfSections() - 1); i >= 0; i--)
{
if (!sectionList[i].isDumped)
{
listPeSection.erase(listPeSection.begin() + i);
setNumberOfSections(getNumberOfSections() - 1);
}
else
{
listPeSection[i].sectionHeader.Misc.VirtualSize = sectionList[i].virtualSize;
listPeSection[i].sectionHeader.SizeOfRawData = sectionList[i].rawSize;
listPeSection[i].sectionHeader.Characteristics = sectionList[i].characteristics;
}
}
}
return dumpProcess(modBase, entryPoint, dumpFilePath);
}
void PeParser::setEntryPointVa(DWORD_PTR entryPoint)
{
DWORD entryPointRva = (DWORD)(entryPoint - moduleBaseAddress);
setEntryPointRva(entryPointRva);
}
void PeParser::setEntryPointRva(DWORD entryPoint)
{
if (isPE32())
{
pNTHeader32->OptionalHeader.AddressOfEntryPoint = entryPoint;
}
else if (isPE64())
{
pNTHeader64->OptionalHeader.AddressOfEntryPoint = entryPoint;
}
}
bool PeParser::getFileOverlay()
{
DWORD numberOfBytesRead;
bool retValue = false;
if (!hasOverlayData())
{
return false;
}
if (openFileHandle())
{
DWORD overlayOffset = getSectionHeaderBasedFileSize();
DWORD fileSize = (DWORD)ProcessAccessHelp::getFileSize(hFile);
overlaySize = fileSize - overlayOffset;
overlayData = new BYTE[overlaySize];
SetFilePointer(hFile, overlayOffset, 0, FILE_BEGIN);
if (ReadFile(hFile, overlayData, overlaySize, &numberOfBytesRead, 0))
{
retValue = true;
}
closeFileHandle();
}
return retValue;
}
bool PeParser::hasOverlayData()
{
if (!filename)
return false;
if (isValidPeFile())
{
DWORD fileSize = (DWORD)ProcessAccessHelp::getFileSize(filename);
return (fileSize > getSectionHeaderBasedFileSize());
}
else
{
return false;
}
}
bool PeParser::updatePeHeaderChecksum(const WCHAR * targetFile, DWORD fileSize)
{
PIMAGE_NT_HEADERS32 pNTHeader32 = 0;
PIMAGE_NT_HEADERS64 pNTHeader64 = 0;
DWORD headerSum = 0;
DWORD checkSum = 0;
bool retValue = false;
if (!fileSize)
return retValue;
HANDLE hFileToMap = CreateFile(targetFile, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if(hFileToMap != INVALID_HANDLE_VALUE)
{
HANDLE hMappedFile = CreateFileMapping(hFileToMap, 0, PAGE_READWRITE, 0, 0, 0);
if(hMappedFile)
{
if (GetLastError() != ERROR_ALREADY_EXISTS)
{
LPVOID addrMappedDll = MapViewOfFile(hMappedFile, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if (addrMappedDll)
{
pNTHeader32 = (PIMAGE_NT_HEADERS32)CheckSumMappedFile(addrMappedDll, fileSize, &headerSum, &checkSum);
if (pNTHeader32)
{
if (pNTHeader32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)
{
pNTHeader64 = (PIMAGE_NT_HEADERS64)pNTHeader32;
pNTHeader64->OptionalHeader.CheckSum = checkSum;
}
else
{
pNTHeader32->OptionalHeader.CheckSum = checkSum;
}
retValue = true;
}
UnmapViewOfFile(addrMappedDll);
}
}
CloseHandle(hMappedFile);
}
CloseHandle(hFileToMap);
}
return retValue;
}
\ No newline at end of file

File Metadata

Mime Type
text/x-diff
Expires
Fri, Nov 15, 12:51 AM (7 h, 52 m)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
84/c1/57d9fdca0c81a3c5867755b15d4e

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