public static object CallMappedDLLModuleExport(PE.PE_META_DATA PEINFO, IntPtr ModuleMemoryBase, string ExportName, Type FunctionDelegateType, object[] Parameters)
{
CallMappedDLLModule(PEINFO, ModuleMemoryBase);
IntPtr pFunc = GetExportAddress(ModuleMemoryBase, ExportName);
return(DynamicFunctionInvoke(pFunc, FunctionDelegateType, ref Parameters));
}
public static void RelocateModule(PE.PE_META_DATA PEINFO, IntPtr ModuleMemoryBase)
{
PE.IMAGE_DATA_DIRECTORY idd = PEINFO.Is32Bit ? PEINFO.OptHeader32.BaseRelocationTable : PEINFO.OptHeader64.BaseRelocationTable;
long ImageDelta = PEINFO.Is32Bit ? (long)((ulong)ModuleMemoryBase - PEINFO.OptHeader32.ImageBase) :
(long)((ulong)ModuleMemoryBase - PEINFO.OptHeader64.ImageBase);
IntPtr pRelocTable = (IntPtr)((ulong)ModuleMemoryBase + idd.VirtualAddress);
int nextRelocTableBlock = -1;
while (nextRelocTableBlock != 0)
{
PE.IMAGE_BASE_RELOCATION ibr = new PE.IMAGE_BASE_RELOCATION();
ibr = (PE.IMAGE_BASE_RELOCATION)Marshal.PtrToStructure(pRelocTable, typeof(PE.IMAGE_BASE_RELOCATION));
long RelocCount = ((ibr.SizeOfBlock - Marshal.SizeOf(ibr)) / 2);
for (int i = 0; i < RelocCount; i++)
{
IntPtr pRelocEntry = (IntPtr)((ulong)pRelocTable + (ulong)Marshal.SizeOf(ibr) + (ulong)(i * 2));
ushort RelocValue = (ushort)Marshal.ReadInt16(pRelocEntry);
ushort RelocType = (ushort)(RelocValue >> 12);
ushort RelocPatch = (ushort)(RelocValue & 0xfff);
if (RelocType != 0)
{
try
{
IntPtr pPatch = (IntPtr)((ulong)ModuleMemoryBase + ibr.VirtualAdress + RelocPatch);
if (RelocType == 0x3)
{
int OriginalPtr = Marshal.ReadInt32(pPatch);
Marshal.WriteInt32(pPatch, (OriginalPtr + (int)ImageDelta));
}
else
{
long OriginalPtr = Marshal.ReadInt64(pPatch);
Marshal.WriteInt64(pPatch, (OriginalPtr + ImageDelta));
}
}
catch
{
throw new InvalidOperationException("Memory access violation.");
}
}
}
pRelocTable = (IntPtr)((ulong)pRelocTable + ibr.SizeOfBlock);
nextRelocTableBlock = Marshal.ReadInt32(pRelocTable);
}
}
public static void CallMappedDLLModule(PE.PE_META_DATA PEINFO, IntPtr ModuleMemoryBase)
{
IntPtr lpEntryPoint = PEINFO.Is32Bit ? (IntPtr)((ulong)ModuleMemoryBase + PEINFO.OptHeader32.AddressOfEntryPoint) :
(IntPtr)((ulong)ModuleMemoryBase + PEINFO.OptHeader64.AddressOfEntryPoint);
PE.DllMain fDllMain = (PE.DllMain)Marshal.GetDelegateForFunctionPointer(lpEntryPoint, typeof(PE.DllMain));
bool CallRes = fDllMain(ModuleMemoryBase, PE.DLL_PROCESS_ATTACH, IntPtr.Zero);
if (!CallRes)
{
throw new InvalidOperationException("Failed to call DllMain -> DLL_PROCESS_ATTACH");
}
}
public static PE.PE_META_DATA GetPeMetaData(IntPtr pModule)
{
PE.PE_META_DATA PeMetaData = new PE.PE_META_DATA();
try
{
uint e_lfanew = (uint)Marshal.ReadInt32((IntPtr)((ulong)pModule + 0x3c));
PeMetaData.Pe = (uint)Marshal.ReadInt32((IntPtr)((ulong)pModule + e_lfanew));
if (PeMetaData.Pe != 0x4550)
{
throw new InvalidOperationException("Invalid PE signature.");
}
PeMetaData.ImageFileHeader = (PE.IMAGE_FILE_HEADER)Marshal.PtrToStructure((IntPtr)((ulong)pModule + e_lfanew + 0x4), typeof(PE.IMAGE_FILE_HEADER));
IntPtr OptHeader = (IntPtr)((ulong)pModule + e_lfanew + 0x18);
ushort PEArch = (ushort)Marshal.ReadInt16(OptHeader);
if (PEArch == 0x010b)
{
PeMetaData.Is32Bit = true;
PeMetaData.OptHeader32 = (PE.IMAGE_OPTIONAL_HEADER32)Marshal.PtrToStructure(OptHeader, typeof(PE.IMAGE_OPTIONAL_HEADER32));
}
else if (PEArch == 0x020b)
{
PeMetaData.Is32Bit = false;
PeMetaData.OptHeader64 = (PE.IMAGE_OPTIONAL_HEADER64)Marshal.PtrToStructure(OptHeader, typeof(PE.IMAGE_OPTIONAL_HEADER64));
}
else
{
throw new InvalidOperationException("Invalid magic value (PE32/PE32+).");
}
PE.IMAGE_SECTION_HEADER[] SectionArray = new PE.IMAGE_SECTION_HEADER[PeMetaData.ImageFileHeader.NumberOfSections];
for (int i = 0; i < PeMetaData.ImageFileHeader.NumberOfSections; i++)
{
IntPtr SectionPtr = (IntPtr)((ulong)OptHeader + PeMetaData.ImageFileHeader.SizeOfOptionalHeader + (uint)(i * 0x28));
SectionArray[i] = (PE.IMAGE_SECTION_HEADER)Marshal.PtrToStructure(SectionPtr, typeof(PE.IMAGE_SECTION_HEADER));
}
PeMetaData.Sections = SectionArray;
}
catch
{
throw new InvalidOperationException("Invalid module base specified.");
}
return(PeMetaData);
}
public static void SetModuleSectionPermissions(PE.PE_META_DATA PEINFO, IntPtr ModuleMemoryBase)
{
IntPtr BaseOfCode = PEINFO.Is32Bit ? (IntPtr)PEINFO.OptHeader32.BaseOfCode : (IntPtr)PEINFO.OptHeader64.BaseOfCode;
Native.NtProtectVirtualMemory((IntPtr)(-1), ref ModuleMemoryBase, ref BaseOfCode, Win32.WinNT.PAGE_READONLY);
foreach (PE.IMAGE_SECTION_HEADER ish in PEINFO.Sections)
{
bool isRead = (ish.Characteristics & PE.DataSectionFlags.MEM_READ) != 0;
bool isWrite = (ish.Characteristics & PE.DataSectionFlags.MEM_WRITE) != 0;
bool isExecute = (ish.Characteristics & PE.DataSectionFlags.MEM_EXECUTE) != 0;
uint flNewProtect = 0;
if (isRead & !isWrite & !isExecute)
{
flNewProtect = Win32.WinNT.PAGE_READONLY;
}
else if (isRead & isWrite & !isExecute)
{
flNewProtect = Win32.WinNT.PAGE_READWRITE;
}
else if (isRead & isWrite & isExecute)
{
flNewProtect = Win32.WinNT.PAGE_EXECUTE_READWRITE;
}
else if (isRead & !isWrite & isExecute)
{
flNewProtect = Win32.WinNT.PAGE_EXECUTE_READ;
}
else if (!isRead & !isWrite & isExecute)
{
flNewProtect = Win32.WinNT.PAGE_EXECUTE;
}
else
{
throw new InvalidOperationException("Unknown section flag, " + ish.Characteristics);
}
IntPtr pVirtualSectionBase = (IntPtr)((ulong)ModuleMemoryBase + ish.VirtualAddress);
IntPtr ProtectSize = (IntPtr)ish.VirtualSize;
Native.NtProtectVirtualMemory((IntPtr)(-1), ref pVirtualSectionBase, ref ProtectSize, flNewProtect);
}
}
public static PE.PE_MANUAL_MAP MapModuleToMemory(IntPtr pModule)
{
PE.PE_META_DATA PEINFO = Generic.GetPeMetaData(pModule);
if ((PEINFO.Is32Bit && IntPtr.Size == 8) || (!PEINFO.Is32Bit && IntPtr.Size == 4))
{
Marshal.FreeHGlobal(pModule);
throw new InvalidOperationException("The module architecture does not match the process architecture.");
}
IntPtr BaseAddress = IntPtr.Zero;
IntPtr RegionSize = PEINFO.Is32Bit ? (IntPtr)PEINFO.OptHeader32.SizeOfImage : (IntPtr)PEINFO.OptHeader64.SizeOfImage;
IntPtr pImage = Native.NtAllocateVirtualMemory(
(IntPtr)(-1), ref BaseAddress, IntPtr.Zero, ref RegionSize,
Win32.Kernel32.MEM_COMMIT | Win32.Kernel32.MEM_RESERVE,
Win32.WinNT.PAGE_READWRITE
);
return(MapModuleToMemory(pModule, pImage, PEINFO));
}
public static void RewriteModuleIAT(PE.PE_META_DATA PEINFO, IntPtr ModuleMemoryBase)
{
PE.IMAGE_DATA_DIRECTORY idd = PEINFO.Is32Bit ? PEINFO.OptHeader32.ImportTable : PEINFO.OptHeader64.ImportTable;
//Check if there is no import table
if (idd.VirtualAddress == 0)
{
//Return so that the rest of the module mapping process may continue.
return;
}
IntPtr pImportTable = (IntPtr)((ulong)ModuleMemoryBase + idd.VirtualAddress);
Native.OSVERSIONINFOEX OSVersion = new Native.OSVERSIONINFOEX();
Native.RtlGetVersion(ref OSVersion);
Dictionary <string, string> ApiSetDict = new Dictionary <string, string>();
if (OSVersion.MajorVersion >= 10)
{
ApiSetDict = Generic.GetApiSetMapping();
}
int counter = 0;
Win32.Kernel32.IMAGE_IMPORT_DESCRIPTOR iid = new Win32.Kernel32.IMAGE_IMPORT_DESCRIPTOR();
iid = (Win32.Kernel32.IMAGE_IMPORT_DESCRIPTOR)Marshal.PtrToStructure(
(IntPtr)((ulong)pImportTable + (uint)(Marshal.SizeOf(iid) * counter)),
typeof(Win32.Kernel32.IMAGE_IMPORT_DESCRIPTOR)
);
while (iid.Name != 0)
{
string DllName = string.Empty;
try
{
DllName = Marshal.PtrToStringAnsi((IntPtr)((ulong)ModuleMemoryBase + iid.Name));
}
catch { }
if (DllName == string.Empty)
{
throw new InvalidOperationException("Failed to read DLL name.");
}
else
{
if (OSVersion.MajorVersion >= 10 && (DllName.StartsWith("api-") || DllName.StartsWith("ext-")) &&
ApiSetDict.ContainsKey(DllName) && ApiSetDict[DllName].Length > 0)
{
DllName = ApiSetDict[DllName];
}
IntPtr hModule = Generic.GetLoadedModuleAddress(DllName);
if (hModule == IntPtr.Zero)
{
hModule = Generic.LoadModuleFromDisk(DllName);
if (hModule == IntPtr.Zero)
{
throw new FileNotFoundException(DllName + ", unable to find the specified file.");
}
}
if (PEINFO.Is32Bit)
{
PE.IMAGE_THUNK_DATA32 oft_itd = new PE.IMAGE_THUNK_DATA32();
for (int i = 0; true; i++)
{
oft_itd = (PE.IMAGE_THUNK_DATA32)Marshal.PtrToStructure((IntPtr)((ulong)ModuleMemoryBase + iid.OriginalFirstThunk + (uint)(i * (sizeof(uint)))), typeof(PE.IMAGE_THUNK_DATA32));
IntPtr ft_itd = (IntPtr)((ulong)ModuleMemoryBase + iid.FirstThunk + (ulong)(i * (sizeof(uint))));
if (oft_itd.AddressOfData == 0)
{
break;
}
if (oft_itd.AddressOfData < 0x80000000)
{
IntPtr pImpByName = (IntPtr)((ulong)ModuleMemoryBase + oft_itd.AddressOfData + sizeof(ushort));
IntPtr pFunc = IntPtr.Zero;
pFunc = Generic.GetNativeExportAddress(hModule, Marshal.PtrToStringAnsi(pImpByName));
Marshal.WriteInt32(ft_itd, pFunc.ToInt32());
}
else
{
ulong fOrdinal = oft_itd.AddressOfData & 0xFFFF;
IntPtr pFunc = IntPtr.Zero;
pFunc = Generic.GetNativeExportAddress(hModule, (short)fOrdinal);
Marshal.WriteInt32(ft_itd, pFunc.ToInt32());
}
}
}
else
{
PE.IMAGE_THUNK_DATA64 oft_itd = new PE.IMAGE_THUNK_DATA64();
for (int i = 0; true; i++)
{
oft_itd = (PE.IMAGE_THUNK_DATA64)Marshal.PtrToStructure((IntPtr)((ulong)ModuleMemoryBase + iid.OriginalFirstThunk + (ulong)(i * (sizeof(ulong)))), typeof(PE.IMAGE_THUNK_DATA64));
IntPtr ft_itd = (IntPtr)((ulong)ModuleMemoryBase + iid.FirstThunk + (ulong)(i * (sizeof(ulong))));
if (oft_itd.AddressOfData == 0)
{
break;
}
if (oft_itd.AddressOfData < 0x8000000000000000)
{
IntPtr pImpByName = (IntPtr)((ulong)ModuleMemoryBase + oft_itd.AddressOfData + sizeof(ushort));
IntPtr pFunc = IntPtr.Zero;
pFunc = Generic.GetNativeExportAddress(hModule, Marshal.PtrToStringAnsi(pImpByName));
Marshal.WriteInt64(ft_itd, pFunc.ToInt64());
}
else
{
ulong fOrdinal = oft_itd.AddressOfData & 0xFFFF;
IntPtr pFunc = IntPtr.Zero;
pFunc = Generic.GetNativeExportAddress(hModule, (short)fOrdinal);
Marshal.WriteInt64(ft_itd, pFunc.ToInt64());
}
}
}
counter++;
iid = (Win32.Kernel32.IMAGE_IMPORT_DESCRIPTOR)Marshal.PtrToStructure(
(IntPtr)((ulong)pImportTable + (uint)(Marshal.SizeOf(iid) * counter)),
typeof(Win32.Kernel32.IMAGE_IMPORT_DESCRIPTOR)
);
}
}
}
public static PE.PE_MANUAL_MAP MapModuleToMemory(IntPtr pModule, IntPtr pImage, PE.PE_META_DATA PEINFO)
{
if ((PEINFO.Is32Bit && IntPtr.Size == 8) || (!PEINFO.Is32Bit && IntPtr.Size == 4))
{
Marshal.FreeHGlobal(pModule);
throw new InvalidOperationException("The module architecture does not match the process architecture.");
}
uint SizeOfHeaders = PEINFO.Is32Bit ? PEINFO.OptHeader32.SizeOfHeaders : PEINFO.OptHeader64.SizeOfHeaders;
uint BytesWritten = Native.NtWriteVirtualMemory((IntPtr)(-1), pImage, pModule, SizeOfHeaders);
foreach (PE.IMAGE_SECTION_HEADER ish in PEINFO.Sections)
{
IntPtr pVirtualSectionBase = (IntPtr)((ulong)pImage + ish.VirtualAddress);
IntPtr pRawSectionBase = (IntPtr)((ulong)pModule + ish.PointerToRawData);
BytesWritten = Native.NtWriteVirtualMemory((IntPtr)(-1), pVirtualSectionBase, pRawSectionBase, ish.SizeOfRawData);
if (BytesWritten != ish.SizeOfRawData)
{
throw new InvalidOperationException("Failed to write to memory.");
}
}
RelocateModule(PEINFO, pImage);
RewriteModuleIAT(PEINFO, pImage);
SetModuleSectionPermissions(PEINFO, pImage);
Marshal.FreeHGlobal(pModule);
PE.PE_MANUAL_MAP ManMapObject = new PE.PE_MANUAL_MAP
{
ModuleBase = pImage,
PEINFO = PEINFO
};
return(ManMapObject);
}
