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diff --git a/Scylla/ApiReader.cpp b/Scylla/ApiReader.cpp
index 532feca..aeff6fe 100644
--- a/Scylla/ApiReader.cpp
+++ b/Scylla/ApiReader.cpp
@@ -1,1107 +1,1116 @@
#include "ApiReader.h"
#include "Logger.h"
#include "definitions.h"
#include "SystemInformation.h"
stdext::hash_multimap<DWORD_PTR, ApiInfo *> ApiReader::apiList; //api look up table
std::map<DWORD_PTR, ImportModuleThunk> * ApiReader::moduleThunkList; //store found apis
DWORD_PTR ApiReader::minApiAddress = 0xFFFFFFFF;
DWORD_PTR ApiReader::maxApiAddress = 0;
//#define DEBUG_COMMENTS
void ApiReader::readApisFromModuleList()
{
for (unsigned int i = 0; i < moduleList.size();i++)
{
setModulePriority(&moduleList[i]);
if (moduleList[i].modBaseAddr + moduleList[i].modBaseSize > maxValidAddress)
{
maxValidAddress = moduleList[i].modBaseAddr + moduleList[i].modBaseSize;
}
Logger::printfDialog(TEXT("Module parsing: %s"),moduleList[i].fullPath);
if (!moduleList[i].isAlreadyParsed)
{
parseModule(&moduleList[i]);
}
}
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("Address Min ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT(" Max ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\nimagebase ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT(" maxValidAddress ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),minApiAddress,maxApiAddress,targetImageBase,maxValidAddress);
#endif
}
void ApiReader::parseModule(ModuleInfo *module)
{
module->parsing = true;
if (isWinSxSModule(module))
{
parseModuleWithMapping(module);
}
else if (isModuleLoadedInOwnProcess(module))
{
parseModuleWithOwnProcess(module);
}
else
{
parseModuleWithProcess(module);
}
module->isAlreadyParsed = true;
}
void ApiReader::parseModuleWithMapping(ModuleInfo *moduleInfo)
{
LPVOID fileMapping = 0;
PIMAGE_NT_HEADERS pNtHeader = 0;
PIMAGE_DOS_HEADER pDosHeader = 0;
fileMapping = createFileMappingViewRead(moduleInfo->fullPath);
if (fileMapping == 0)
return;
pDosHeader = (PIMAGE_DOS_HEADER)fileMapping;
pNtHeader = (PIMAGE_NT_HEADERS)((DWORD_PTR)fileMapping + (DWORD_PTR)(pDosHeader->e_lfanew));
if (isPeAndExportTableValid(pNtHeader))
{
parseExportTable(moduleInfo, pNtHeader, (PIMAGE_EXPORT_DIRECTORY)((DWORD_PTR)fileMapping + pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress), (DWORD_PTR)fileMapping);
}
UnmapViewOfFile(fileMapping);
}
inline bool ApiReader::isApiForwarded(DWORD_PTR rva, PIMAGE_NT_HEADERS pNtHeader)
{
if ((rva > pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress) && (rva < (pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress + pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size)))
{
return true;
}
else
{
return false;
}
}
void ApiReader::handleForwardedApi(DWORD_PTR vaStringPointer,char * functionNameParent, DWORD_PTR rvaParent, DWORD_PTR ordinalParent, ModuleInfo *moduleParent)
{
size_t dllNameLength = 0;
DWORD_PTR ordinal = 0;
ModuleInfo *module = 0;
DWORD_PTR vaApi = 0;
DWORD_PTR rvaApi = 0;
char dllName[100] = {0};
WCHAR dllNameW[100] = {0};
char *fordwardedString = (char *)vaStringPointer;
char *searchFunctionName = strchr(fordwardedString, '.');
if (!searchFunctionName)
return;
dllNameLength = searchFunctionName - fordwardedString;
if (dllNameLength >= 99)
{
return;
}
else
{
strncpy_s(dllName,sizeof(dllName),fordwardedString,dllNameLength);
}
searchFunctionName++;
//Windows 7
if (!strncmp(dllName,"api-ms-win-", 11))
{
/*
Info: http://www.nirsoft.net/articles/windows_7_kernel_architecture_changes.html
*/
FARPROC addy = GetProcAddress(GetModuleHandleA(dllName), searchFunctionName);
if (addy != 0)
{
addApi(functionNameParent,0, ordinalParent, (DWORD_PTR)addy, (DWORD_PTR)addy - (DWORD_PTR)GetModuleHandleA(dllName), true, moduleParent);
}
return;
}
strcat_s(dllName,sizeof(dllName),".dll");
size_t convertedChars = 0;
mbstowcs_s(&convertedChars, dllNameW, strlen(dllName) + 1, dllName, _TRUNCATE);
if (!_wcsicmp(dllNameW, moduleParent->getFilename()))
{
module = moduleParent;
}
else
{
module = findModuleByName(dllNameW);
}
if (module != 0) // module == 0 -> can be ignored
{
/*if ((module->isAlreadyParsed == false) && (module != moduleParent))
{
//do API extract
if (module->parsing == true)
{
//some stupid circle dependency
printf("stupid circle dependency %s\n",module->getFilename());
}
else
{
parseModule(module);
}
}*/
if (strchr(searchFunctionName,'#'))
{
//forwarding by ordinal
searchFunctionName++;
ordinal = atoi(searchFunctionName);
findApiByModuleAndOrdinal(module, ordinal, &vaApi, &rvaApi);
}
else
{
findApiByModuleAndName(module, searchFunctionName, &vaApi, &rvaApi);
}
if (rvaApi == 0)
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(L"handleForwardedApi :: Api not found, this is really BAD! %S\r\n",fordwardedString);
#endif
}
else
{
addApi(functionNameParent,0, ordinalParent, vaApi, rvaApi, true, moduleParent);
}
}
}
ModuleInfo * ApiReader::findModuleByName(WCHAR *name)
{
for (unsigned int i = 0; i < moduleList.size(); i++) {
if (!_wcsicmp(moduleList[i].getFilename(), name))
{
return &moduleList[i];
}
}
return 0;
}
void ApiReader::addApiWithoutName(DWORD_PTR ordinal, DWORD_PTR va, DWORD_PTR rva,bool isForwarded, ModuleInfo *moduleInfo)
{
addApi(0, 0, ordinal, va, rva, isForwarded, moduleInfo);
}
void ApiReader::addApi(char *functionName, WORD hint, DWORD_PTR ordinal, DWORD_PTR va, DWORD_PTR rva, bool isForwarded, ModuleInfo *moduleInfo)
{
ApiInfo *apiInfo = new ApiInfo();
if ((functionName != 0) && (strlen(functionName) < MAX_PATH))
{
strcpy_s(apiInfo->name, MAX_PATH, functionName);
}
else
{
apiInfo->name[0] = 0x00;
}
apiInfo->ordinal = ordinal;
apiInfo->isForwarded = isForwarded;
apiInfo->module = moduleInfo;
apiInfo->rva = rva;
apiInfo->va = va;
apiInfo->hint = hint;
setMinMaxApiAddress(va);
moduleInfo->apiList.push_back(apiInfo);
apiList.insert(API_Pair(va, apiInfo));
}
BYTE * ApiReader::getHeaderFromProcess(ModuleInfo * module)
{
BYTE *bufferHeader = 0;
DWORD readSize = 0;
if (module->modBaseSize < PE_HEADER_BYTES_COUNT)
{
readSize = module->modBaseSize;
}
else
{
readSize = PE_HEADER_BYTES_COUNT;
}
bufferHeader = new BYTE[readSize];
if(!readMemoryFromProcess(module->modBaseAddr, readSize, bufferHeader))
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(L"getHeaderFromProcess :: Error reading header\r\n");
#endif
delete[] bufferHeader;
return 0;
}
else
{
return bufferHeader;
}
}
BYTE * ApiReader::getExportTableFromProcess(ModuleInfo * module, PIMAGE_NT_HEADERS pNtHeader)
{
DWORD readSize = 0;
BYTE *bufferExportTable = 0;
readSize = pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
if (readSize < (sizeof(IMAGE_EXPORT_DIRECTORY) + 8))
{
//Something is wrong with the PE Header
#ifdef DEBUG_COMMENTS
Logger::debugLog(L"Something is wrong with the PE Header here Export table size %d\r\n",readSize);
#endif
readSize = sizeof(IMAGE_EXPORT_DIRECTORY) + 100;
}
if (readSize)
{
bufferExportTable = new BYTE[readSize];
if(!readMemoryFromProcess(module->modBaseAddr + pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress, readSize, bufferExportTable))
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(L"getExportTableFromProcess :: Error reading export table from process\r\n");
#endif
delete[] bufferExportTable;
return 0;
}
else
{
return bufferExportTable;
}
}
else
{
return 0;
}
}
void ApiReader::parseModuleWithProcess(ModuleInfo * module)
{
PIMAGE_NT_HEADERS pNtHeader = 0;
PIMAGE_DOS_HEADER pDosHeader = 0;
BYTE *bufferHeader = 0;
BYTE *bufferExportTable = 0;
bufferHeader = getHeaderFromProcess(module);
if (bufferHeader == 0)
return;
pDosHeader = (PIMAGE_DOS_HEADER)bufferHeader;
pNtHeader = (PIMAGE_NT_HEADERS)((DWORD_PTR)bufferHeader + (DWORD_PTR)(pDosHeader->e_lfanew));
if (isPeAndExportTableValid(pNtHeader))
{
bufferExportTable = getExportTableFromProcess(module, pNtHeader);
if(bufferExportTable)
{
parseExportTable(module,pNtHeader,(PIMAGE_EXPORT_DIRECTORY)bufferExportTable, (DWORD_PTR)bufferExportTable - pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
delete[] bufferExportTable;
}
}
delete[] bufferHeader;
}
void ApiReader::parseExportTable(ModuleInfo *module, PIMAGE_NT_HEADERS pNtHeader, PIMAGE_EXPORT_DIRECTORY pExportDir, DWORD_PTR deltaAddress)
{
DWORD *addressOfFunctionsArray = 0,*addressOfNamesArray = 0;
WORD *addressOfNameOrdinalsArray = 0;
char *functionName = 0;
DWORD_PTR RVA = 0, VA = 0, ordinal = 0;
DWORD i = 0, j = 0;
bool withoutName;
addressOfFunctionsArray = (DWORD *)((DWORD_PTR)pExportDir->AddressOfFunctions + deltaAddress);
addressOfNamesArray = (DWORD *)((DWORD_PTR)pExportDir->AddressOfNames + deltaAddress);
addressOfNameOrdinalsArray = (WORD *)((DWORD_PTR)pExportDir->AddressOfNameOrdinals + deltaAddress);
#ifdef DEBUG_COMMENTS
Logger::debugLog(L"parseExportTable :: module %s NumberOfNames %X\r\n",module->fullPath,pExportDir->NumberOfNames);
#endif
for (i = 0; i < pExportDir->NumberOfNames; i++)
{
functionName = (char*)(addressOfNamesArray[i] + deltaAddress);
ordinal = (addressOfNameOrdinalsArray[i] + pExportDir->Base);
RVA = addressOfFunctionsArray[addressOfNameOrdinalsArray[i]];
VA = addressOfFunctionsArray[addressOfNameOrdinalsArray[i]] + module->modBaseAddr;
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("parseExportTable :: api %S ")TEXT(" ordinal %d imagebase ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT(" RVA ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT(" VA ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),functionName,ordinal,module->modBaseAddr,RVA,VA);
#endif
if (!isApiBlacklisted(functionName))
{
if (!isApiForwarded(RVA,pNtHeader))
{
addApi(functionName, (WORD)i, ordinal,VA,RVA,false,module);
}
else
{
//printf("Forwarded: %s\n",functionName);
handleForwardedApi(RVA + deltaAddress,functionName,RVA,ordinal,module);
}
}
}
/*Exports without name*/
if (pExportDir->NumberOfNames != pExportDir->NumberOfFunctions)
{
for (i = 0; i < pExportDir->NumberOfFunctions; i++)
{
withoutName = true;
for (j = 0; j < pExportDir->NumberOfNames; j++)
{
if(addressOfNameOrdinalsArray[j] == i)
{
withoutName = false;
break;
}
}
if (withoutName && addressOfFunctionsArray[i] != 0)
{
ordinal = (i+pExportDir->Base);
RVA = addressOfFunctionsArray[i];
VA = (addressOfFunctionsArray[i] + module->modBaseAddr);
if (!isApiForwarded(RVA,pNtHeader))
{
addApiWithoutName(ordinal,VA,RVA,false,module);
}
else
{
handleForwardedApi(RVA + deltaAddress,0,RVA,ordinal,module);
}
}
}
}
}
void ApiReader::findApiByModuleAndOrdinal(ModuleInfo * module, DWORD_PTR ordinal, DWORD_PTR * vaApi, DWORD_PTR * rvaApi)
{
findApiByModule(module,0,ordinal,vaApi,rvaApi);
}
void ApiReader::findApiByModuleAndName(ModuleInfo * module, char * searchFunctionName, DWORD_PTR * vaApi, DWORD_PTR * rvaApi)
{
findApiByModule(module,searchFunctionName,0,vaApi,rvaApi);
}
void ApiReader::findApiByModule(ModuleInfo * module, char * searchFunctionName, DWORD_PTR ordinal, DWORD_PTR * vaApi, DWORD_PTR * rvaApi)
{
if (isModuleLoadedInOwnProcess(module))
{
HMODULE hModule = GetModuleHandle(module->getFilename());
if (hModule)
{
if (ordinal)
{
*vaApi = (DWORD_PTR)GetProcAddress(hModule, (LPCSTR)ordinal);
}
else
{
*vaApi = (DWORD_PTR)GetProcAddress(hModule, searchFunctionName);
}
if (vaApi)
{
*rvaApi = (*vaApi) - (DWORD_PTR)hModule;
*vaApi = (*rvaApi) + module->modBaseAddr;
}
else
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("findApiByModule :: vaApi == NULL, should never happen %S\r\n"),searchFunctionName);
#endif
}
}
else
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("findApiByModule :: hModule == NULL, should never happen %s\r\n"),module->getFilename());
#endif
}
}
else
{
//search api in extern process
findApiInProcess(module,searchFunctionName,ordinal,vaApi,rvaApi);
}
}
bool ApiReader::isModuleLoadedInOwnProcess(ModuleInfo * module)
{
for (unsigned int i = 0; i < ownModuleList.size(); i++)
{
if (!_wcsicmp(module->fullPath, ownModuleList[i].fullPath))
{
//printf("isModuleLoadedInOwnProcess :: %s %s\n",module->fullPath,ownModuleList[i].fullPath);
return true;
}
}
return false;
}
void ApiReader::parseModuleWithOwnProcess( ModuleInfo * module )
{
PIMAGE_NT_HEADERS pNtHeader = 0;
PIMAGE_DOS_HEADER pDosHeader = 0;
HMODULE hModule = GetModuleHandle(module->getFilename());
if (hModule)
{
pDosHeader = (PIMAGE_DOS_HEADER)hModule;
pNtHeader = (PIMAGE_NT_HEADERS)((DWORD_PTR)hModule + (DWORD_PTR)(pDosHeader->e_lfanew));
if (isPeAndExportTableValid(pNtHeader))
{
parseExportTable(module, pNtHeader, (PIMAGE_EXPORT_DIRECTORY)((DWORD_PTR)hModule + pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress), (DWORD_PTR)hModule);
}
}
else
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("parseModuleWithOwnProcess :: hModule is NULL\r\n"));
#endif
}
}
bool ApiReader::isPeAndExportTableValid(PIMAGE_NT_HEADERS pNtHeader)
{
if (pNtHeader->Signature != IMAGE_NT_SIGNATURE)
{
Logger::printfDialog(TEXT("-> IMAGE_NT_SIGNATURE doesn't match."));
return false;
}
else if ((pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress == 0) || (pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size == 0))
{
Logger::printfDialog(TEXT("-> No export table."));
return false;
}
else
{
return true;
}
}
void ApiReader::findApiInProcess(ModuleInfo * module, char * searchFunctionName, DWORD_PTR ordinal, DWORD_PTR * vaApi, DWORD_PTR * rvaApi)
{
PIMAGE_NT_HEADERS pNtHeader = 0;
PIMAGE_DOS_HEADER pDosHeader = 0;
BYTE *bufferHeader = 0;
BYTE *bufferExportTable = 0;
bufferHeader = getHeaderFromProcess(module);
if (bufferHeader == 0)
return;
pDosHeader = (PIMAGE_DOS_HEADER)bufferHeader;
pNtHeader = (PIMAGE_NT_HEADERS)((DWORD_PTR)bufferHeader + (DWORD_PTR)(pDosHeader->e_lfanew));
if (isPeAndExportTableValid(pNtHeader))
{
bufferExportTable = getExportTableFromProcess(module, pNtHeader);
if(bufferExportTable)
{
findApiInExportTable(module,(PIMAGE_EXPORT_DIRECTORY)bufferExportTable, (DWORD_PTR)bufferExportTable - pNtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress,searchFunctionName,ordinal,vaApi,rvaApi);
delete[] bufferExportTable;
}
}
delete[] bufferHeader;
}
bool ApiReader::findApiInExportTable(ModuleInfo *module, PIMAGE_EXPORT_DIRECTORY pExportDir, DWORD_PTR deltaAddress, char * searchFunctionName, DWORD_PTR ordinal, DWORD_PTR * vaApi, DWORD_PTR * rvaApi)
{
DWORD *addressOfFunctionsArray = 0,*addressOfNamesArray = 0;
WORD *addressOfNameOrdinalsArray = 0;
char *functionName = 0;
DWORD i = 0, j = 0;
addressOfFunctionsArray = (DWORD *)((DWORD_PTR)pExportDir->AddressOfFunctions + deltaAddress);
addressOfNamesArray = (DWORD *)((DWORD_PTR)pExportDir->AddressOfNames + deltaAddress);
addressOfNameOrdinalsArray = (WORD *)((DWORD_PTR)pExportDir->AddressOfNameOrdinals + deltaAddress);
if (searchFunctionName)
{
for (i = 0; i < pExportDir->NumberOfNames; i++)
{
functionName = (char*)(addressOfNamesArray[i] + deltaAddress);
if (!strcmp(functionName,searchFunctionName))
{
*rvaApi = addressOfFunctionsArray[addressOfNameOrdinalsArray[i]];
*vaApi = addressOfFunctionsArray[addressOfNameOrdinalsArray[i]] + module->modBaseAddr;
return true;
}
}
}
else
{
for (i = 0; i < pExportDir->NumberOfFunctions; i++)
{
if (ordinal == (i+pExportDir->Base))
{
*rvaApi = addressOfFunctionsArray[i];
*vaApi = (addressOfFunctionsArray[i] + module->modBaseAddr);
return true;
}
}
}
return false;
}
void ApiReader::setModulePriority(ModuleInfo * module)
{
const WCHAR *moduleFileName = module->getFilename();
if (!_wcsicmp(moduleFileName, TEXT("kernelbase.dll")))
{
module->priority = 0;
}
else if (!_wcsicmp(moduleFileName, TEXT("ntdll.dll")))
{
module->priority = 0;
}
else if (!_wcsicmp(moduleFileName, TEXT("shlwapi.dll")))
{
module->priority = 0;
}
else if (!_wcsicmp(moduleFileName, TEXT("ShimEng.dll")))
{
module->priority = 0;
}
else if (!_wcsicmp(moduleFileName, TEXT("kernel32.dll")))
{
module->priority = 2;
}
else
{
module->priority = 1;
}
}
bool ApiReader::isApiAddressValid(DWORD_PTR virtualAddress)
{
return apiList.count(virtualAddress) > 0;
}
ApiInfo * ApiReader::getApiByVirtualAddress(DWORD_PTR virtualAddress, bool * isSuspect)
{
stdext::hash_multimap<DWORD_PTR, ApiInfo *>::iterator it1, it2;
size_t c = 0;
size_t countDuplicates = apiList.count(virtualAddress);
int countHighPriority = 0;
ApiInfo *apiFound = 0;
if (countDuplicates == 0)
{
Logger::printfDialog(TEXT("getApiByVirtualAddress :: No Api found ")TEXT(PRINTF_DWORD_PTR_FULL),virtualAddress);
return 0;
}
else if (countDuplicates == 1)
{
//API is 100% correct
*isSuspect = false;
it1 = apiList.find(virtualAddress); // Find first match.
return (ApiInfo *)((*it1).second);
}
else
{
it1 = apiList.find(virtualAddress); // Find first match.
it2 = it1;
for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
if (apiFound->module->priority >= 1) //1 == high priority
{
countHighPriority++;
}
}
it1 = it2;
+ /*
+ This is flawed:
+ It chooses api(prio:1, name:no) over api(prio:0, name:yes)
+ (e.g. SHLWAPI.PathCombineW vs SHELL32.#25)
+
+ Maybe there should be a check higher up in the code, to see if this API is surrounded
+ by APIs of a DLL and pick the duplicate from that DLL
+ */
+
if (countHighPriority == 0)
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("getApiByVirtualAddress :: countHighPriority == 0 ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),virtualAddress);
#endif
*isSuspect = true;
return (ApiInfo *)((*it1).second);
}
- else if (countHighPriority == 1)
+ else if (countHighPriority == 1) // what about kernel32, it has priority 2
{
//API is 100% correct if countHighPriority == 1 and name export
*isSuspect = false;
for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
if (apiFound->module->priority >= 1 && apiFound->name[0] != 0x00) //1 == high priority
{
return apiFound;
}
}
}
- else
+ //else // fall through for case api1(priority:1, name:false) <> api2(priority:0, name:true)
{
//API not 100% correct
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("getApiByVirtualAddress :: countHighPriority == %d ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),countHighPriority,virtualAddress);
#endif
*isSuspect = true;
/*for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
Logger::printfDialog("%s - %s %X %X\n",apiFound->name,apiFound->module->getFilename(),apiFound->rva, apiFound->ordinal);
}
it1 = it2;*/
for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
//prefer APIs with a name
if (apiFound->module->priority >= 1 && apiFound->name[0] != 0x00) //1 == high priority
{
//prefer ANSI/UNICODE APIs
if (strrchr(apiFound->name,TEXT('W')) || strrchr(apiFound->name,TEXT('A')))
{
return apiFound;
}
}
}
it1 = it2;
for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
//prefer APIs with a name
if (apiFound->module->priority == 2 && !strrchr(apiFound->name,TEXT('_'))) //1 == high priority
{
return apiFound;
}
}
it1 = it2;
for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
if (apiFound->module->priority == 1 && apiFound->name[0] != 0x00) //1 == high priority
{
return apiFound;
}
}
it1 = it2;
for (c = 0; c < countDuplicates; c++, it1++)
{
apiFound = (ApiInfo *)((*it1).second);
if (apiFound->module->priority == 1) //1 == high priority
{
return apiFound;
}
}
}
}
//is never reached
- Logger::printfDialog(TEXT("getApiByVirtualAddress :: There is a big bug\n"));
+ Logger::printfDialog(TEXT("getApiByVirtualAddress :: There is a big bug"));
return (ApiInfo *) 1;
}
void ApiReader::setMinMaxApiAddress(DWORD_PTR virtualAddress)
{
if (virtualAddress < minApiAddress)
{
minApiAddress = virtualAddress - 1;
}
if (virtualAddress > maxApiAddress)
{
maxApiAddress = virtualAddress + 1;
}
}
void ApiReader::readAndParseIAT(DWORD_PTR addressIAT, DWORD sizeIAT, std::map<DWORD_PTR, ImportModuleThunk> &moduleListNew)
{
moduleThunkList = &moduleListNew;
BYTE *dataIat = new BYTE[sizeIAT];
if (readMemoryFromProcess(addressIAT,sizeIAT,dataIat))
{
parseIAT(addressIAT,dataIat,sizeIAT);
}
else
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("ApiReader::readAndParseIAT :: error reading iat ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),addressIAT);
#endif
}
delete[] dataIat;
}
void ApiReader::parseIAT(DWORD_PTR addressIAT, BYTE * iatBuffer, SIZE_T size)
{
ApiInfo *apiFound = 0;
ModuleInfo *module = 0;
bool isSuspect = false;
int countApiFound = 0, countApiNotFound = 0;
DWORD_PTR * pIATAddress = (DWORD_PTR *)iatBuffer;
SIZE_T sizeIAT = size / sizeof(DWORD_PTR);
bool foundModuleBreak = false;
for (SIZE_T i = 0; i < sizeIAT; i++)
{
//Logger::printfDialog("%08X %08X %d von %d",addressIAT + (DWORD_PTR)&pIATAddress[i] - (DWORD_PTR)iatBuffer,pIATAddress[i],i,sizeIAT);
if (pIATAddress[i] == 0 || pIATAddress[i] == -1)
{
/*if (pIATAddress[i+1] != 0)
{
printf("parseIAT :: Module break\n");
}*/
/*else
{
printf("parseIAT :: IAT finished\n");
break;
}*/
foundModuleBreak = true;
}
else if ( (pIATAddress[i] > minApiAddress) && (pIATAddress[i] < maxApiAddress) )
{
apiFound = getApiByVirtualAddress(pIATAddress[i], &isSuspect);
if (apiFound == (ApiInfo *)1)
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("apiFound == (ApiInfo *)1 -> ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),pIATAddress[i]);
#endif
}
else if (apiFound)
{
countApiFound++;
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("")TEXT(PRINTF_DWORD_PTR_FULL)TEXT(" %s %d %s\r\n"),apiFound->va, apiFound->module->getFilename(), apiFound->ordinal,apiFound->name);
#endif
if (module != apiFound->module)
{
module = apiFound->module;
addFoundApiToModuleList(addressIAT + (DWORD_PTR)&pIATAddress[i] - (DWORD_PTR)iatBuffer, apiFound, true, isSuspect);
}
else
{
addFoundApiToModuleList(addressIAT + (DWORD_PTR)&pIATAddress[i] - (DWORD_PTR)iatBuffer, apiFound, false, isSuspect);
}
}
else
{
countApiNotFound++;
addNotFoundApiToModuleList(addressIAT + (DWORD_PTR)&pIATAddress[i] - (DWORD_PTR)iatBuffer, pIATAddress[i]);
//printf("parseIAT :: API not found %08X\n", pIATAddress[i]);
}
}
else
{
//printf("parseIAT :: API not found %08X\n", pIATAddress[i]);
countApiNotFound++;
addNotFoundApiToModuleList(addressIAT + (DWORD_PTR)&pIATAddress[i] - (DWORD_PTR)iatBuffer, pIATAddress[i]);
}
}
Logger::printfDialog(TEXT("IAT parsing finished, found %d valid APIs, missed %d APIs"),countApiFound,countApiNotFound);
}
void ApiReader::addFoundApiToModuleList(DWORD_PTR iatAddressVA, ApiInfo * apiFound, bool isNewModule, bool isSuspect)
{
if (isNewModule)
{
addModuleToModuleList(apiFound->module->getFilename(), iatAddressVA - targetImageBase);
}
addFunctionToModuleList(apiFound, iatAddressVA, iatAddressVA - targetImageBase, apiFound->ordinal, true, isSuspect);
}
bool ApiReader::addModuleToModuleList(const WCHAR * moduleName, DWORD_PTR firstThunk)
{
ImportModuleThunk module;
module.firstThunk = firstThunk;
wcscpy_s(module.moduleName, MAX_PATH, moduleName);
(*moduleThunkList).insert(std::pair<DWORD_PTR,ImportModuleThunk>(firstThunk,module));
return true;
}
void ApiReader::addUnknownModuleToModuleList(DWORD_PTR firstThunk)
{
ImportModuleThunk module;
module.firstThunk = firstThunk;
wcscpy_s(module.moduleName, MAX_PATH, TEXT("?"));
(*moduleThunkList).insert(std::pair<DWORD_PTR,ImportModuleThunk>(firstThunk,module));
}
bool ApiReader::addFunctionToModuleList(ApiInfo * apiFound, DWORD_PTR va, DWORD_PTR rva, DWORD_PTR ordinal, bool valid, bool suspect)
{
ImportThunk import;
ImportModuleThunk * module = 0;
std::map<DWORD_PTR, ImportModuleThunk>::iterator iterator1;
if ((*moduleThunkList).size() > 1)
{
iterator1 = (*moduleThunkList).begin();
while (iterator1 != (*moduleThunkList).end())
{
if (rva >= iterator1->second.firstThunk)
{
iterator1++;
if (iterator1 == (*moduleThunkList).end())
{
iterator1--;
module = &(iterator1->second);
break;
}
else if (rva < iterator1->second.firstThunk)
{
iterator1--;
module = &(iterator1->second);
break;
}
}
else
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("Error iterator1 != (*moduleThunkList).end()\r\n"));
#endif
break;
}
}
}
else
{
iterator1 = (*moduleThunkList).begin();
module = &(iterator1->second);
}
if (!module)
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("ImportsHandling::addFunction module not found rva ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),rva);
#endif
return false;
}
import.suspect = suspect;
import.valid = valid;
import.va = va;
import.rva = rva;
import.apiAddressVA = apiFound->va;
import.ordinal = ordinal;
import.hint = (WORD)apiFound->hint;
wcscpy_s(import.moduleName, MAX_PATH, apiFound->module->getFilename());
strcpy_s(import.name, MAX_PATH, apiFound->name);
module->thunkList.insert(std::pair<DWORD_PTR,ImportThunk>(import.rva, import));
return true;
}
void ApiReader::clearAll()
{
minApiAddress = -1;
maxApiAddress = 0;
for ( stdext::hash_multimap<DWORD_PTR, ApiInfo *>::iterator it = apiList.begin(); it != apiList.end(); ++it )
{
delete it->second;
}
apiList.clear();
if (moduleThunkList != 0)
{
(*moduleThunkList).clear();
}
}
bool ApiReader::addNotFoundApiToModuleList(DWORD_PTR iatAddressVA, DWORD_PTR apiAddress)
{
ImportThunk import;
ImportModuleThunk * module = 0;
std::map<DWORD_PTR, ImportModuleThunk>::iterator iterator1;
DWORD_PTR rva = iatAddressVA - targetImageBase;
if ((*moduleThunkList).size() > 0)
{
iterator1 = (*moduleThunkList).begin();
while (iterator1 != (*moduleThunkList).end())
{
if (rva >= iterator1->second.firstThunk)
{
iterator1++;
if (iterator1 == (*moduleThunkList).end())
{
iterator1--;
//new unknown module
if (iterator1->second.moduleName[0] == L'?')
{
module = &(iterator1->second);
}
else
{
addUnknownModuleToModuleList(rva);
module = &((*moduleThunkList).find(rva)->second);
}
break;
}
else if (rva < iterator1->second.firstThunk)
{
iterator1--;
module = &(iterator1->second);
break;
}
}
else
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("Error iterator1 != (*moduleThunkList).end()\r\n"));
#endif
break;
}
}
}
else
{
//new unknown module
addUnknownModuleToModuleList(rva);
module = &((*moduleThunkList).find(rva)->second);
}
if (!module)
{
#ifdef DEBUG_COMMENTS
Logger::debugLog(TEXT("ImportsHandling::addFunction module not found rva ")TEXT(PRINTF_DWORD_PTR_FULL)TEXT("\r\n"),rva);
#endif
return false;
}
import.suspect = true;
import.valid = false;
import.va = iatAddressVA;
import.rva = rva;
import.apiAddressVA = apiAddress;
import.ordinal = 0;
wcscpy_s(import.moduleName, MAX_PATH, TEXT("?"));
strcpy_s(import.name, MAX_PATH, "?");
module->thunkList.insert(std::pair<DWORD_PTR,ImportThunk>(import.rva, import));
return true;
}
bool ApiReader::isApiBlacklisted( const char * functionName )
{
if (SystemInformation::currenOS < WIN_VISTA_32)
{
if (!strcmp(functionName, "RestoreLastError"))
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
/*#ifdef _WIN64
else if (SystemInformation::currenOS == WIN_XP_64 && !strcmp(functionName, "DecodePointer"))
{
return true;
}
#endif*/
}
bool ApiReader::isWinSxSModule( ModuleInfo * module )
{
if (wcsstr(module->fullPath, TEXT("\\WinSxS\\")))
{
return true;
}
else if (wcsstr(module->fullPath, TEXT("\\winsxs\\")))
{
return true;
}
else
{
return false;
}
}

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text/x-diff
Expires
Tue, Jan 7, 12:36 AM (2 h, 37 m)
Storage Engine
local-disk
Storage Format
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Storage Handle
30/98/654affd809afc5f80008886c26ff

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