private bool UnloadDll(int id, IntPtr hModule)
{
try
{
IntPtr hProcess = PInvoke.OpenProcess(ExtendedTypes.ProcessAccessFlags.All, false, id);
IntPtr fnFreeLibrary = PInvoke.GetProcAddress(PInvoke.GetModuleHandleA("kernel32.dll"), "FreeLibrary");
if (fnFreeLibrary == IntPtr.Zero)
{
throw new Exception("Unable to find necessary function entry points in the remote process");
}
uint hMod = Utils.RunThread(hProcess, fnFreeLibrary, hModule, 10000);
if (hMod == uint.MaxValue)
{
throw new Exception("Error occurred when calling function in the remote process");
}
if (hMod == 0)
{
throw new Exception("Failed to load module into remote process. Error code: " + Utils.GetLastErrorEx(hProcess));
}
return(true);
}
catch (Exception e)
{
logBox.AppendText("\n" + e.Message);
return(false);
}
}
private IntPtr LoadDll(string dllPath, int id)
{
try
{
IntPtr hProcess = PInvoke.OpenProcess(ExtendedTypes.ProcessAccessFlags.All, false, id);
IntPtr hModule;
IntPtr fnLoadLibraryW = PInvoke.GetProcAddress(PInvoke.GetModuleHandleA("kernel32.dll"), "LoadLibraryW");
if (fnLoadLibraryW == IntPtr.Zero)
{
throw new Exception("Unable to locate the LoadLibraryW entry point");
}
// Create a wchar_t * in the remote process which points to the unicode version of the dll path.
IntPtr pLib = Utils.CreateRemotePointer(hProcess, Encoding.Unicode.GetBytes(dllPath + "\0"), 0x04);
if (pLib == IntPtr.Zero)
{
throw new InvalidOperationException("Failed to allocate memory in the remote process");
}
try
{
// Call LoadLibraryW in the remote process by using CreateRemoteThread.
uint hMod = Utils.RunThread(hProcess, fnLoadLibraryW, pLib, 10000);
if (hMod == uint.MaxValue)
{
throw new Exception("Error occurred when calling function in the remote process");
}
else if (hMod == 0)
{
throw new Exception("Failed to load module into remote process. Error code: " + Utils.GetLastErrorEx(hProcess).ToString());
}
else
{
hModule = new IntPtr(hMod);
}
}
finally
{
// Cleanup in all cases.
PInvoke.VirtualFreeEx(hProcess, pLib, 0, 0x8000);
}
return(hModule);
}
catch (Exception e)
{
logBox.AppendText("\n" + e.Message);
return(IntPtr.Zero);
}
}
public static uint GetLastErrorEx(IntPtr hProcess)
{
IntPtr fnGetLastError = PInvoke.GetProcAddress(PInvoke.GetModuleHandleA("kernel32.dll"), "GetLastError");
return(RunThread(hProcess, fnGetLastError, IntPtr.Zero));
}