Exemplo n.º 1
0
        public static bool CreateNtHardLink(string link, string target, uint FileLinkInformation = 0xB)
        {
            string linkFullPath = GetFullPathName(link);
            // IO.* does not support full path name on Win7
            string linkParent = System.IO.Directory.GetParent(link).FullName;

            if (!System.IO.Directory.Exists(linkParent))
            {
                Console.WriteLine("[!] Invalid link folder path specified..");
                return(false);
            }

            FILE_LINK_INFORMATION fileLinkInformation = new FILE_LINK_INFORMATION();

            fileLinkInformation.ReplaceIfExists = true;
            fileLinkInformation.FileName        = linkFullPath;
            fileLinkInformation.RootDirectory   = IntPtr.Zero;
            fileLinkInformation.FileNameLength  = (UInt32)linkFullPath.Length * 2;
            int    fileLinkInformationLen = System.Runtime.InteropServices.Marshal.SizeOf(fileLinkInformation);
            IntPtr pFileLinkInformation   = System.Runtime.InteropServices.Marshal.AllocHGlobal(fileLinkInformationLen);

            System.Runtime.InteropServices.Marshal.StructureToPtr(fileLinkInformation, pFileLinkInformation, true);
            IO_STATUS_BLOCK ioStatusBlock = new IO_STATUS_BLOCK();

            // Get handle to target
            IntPtr hTarget = GetNativeFileHandle(target);

            if (hTarget == IntPtr.Zero)
            {
                Console.WriteLine("[!] Couldnt get file handle {0} ..", target);
                return(false);
            }

            // FileInformationClass => FileLinkInformation = 0xB
            UInt32 result = NtHardLink.NtSetInformationFile(hTarget, ref ioStatusBlock, pFileLinkInformation, (UInt32)fileLinkInformationLen, 0xB);

            //UInt32 result = NtHardLink.NtSetInformationFile(hTarget, ref ioStatusBlock, pFileLinkInformation, (UInt32)fileLinkInformationLen, FileLinkInformation);
            if (result == 0)
            {
                // everything is OK
                bool bResult = NtHardLink.CloseHandle(hTarget);
                return(true);
            }
            else
            {
                Console.WriteLine("[!] Failed to create hardlink, NTSTATUS({0:X})..", result);
                bool bResult = NtHardLink.CloseHandle(hTarget);
                return(false);
            }
        }
Exemplo n.º 2
0
        private static IntPtr GetNativeFileHandle(string path)
        {
            IntPtr handle = IntPtr.Zero, hFile = IntPtr.Zero;
            string fullPath = GetFullPathName(path);

            if (!string.IsNullOrEmpty(path))
            {
                /*if(!File.Exists(path))
                 * {
                 *  Console.WriteLine("[!] Invalid file path specified..");
                 *  return handle;
                 * }*/
            }
            else
            {
                Console.WriteLine("[!] Failed to retrieve fully qualified path..");
                return(handle);
            }
            // Prepare NtOpenFile params
            OBJECT_ATTRIBUTES objAttr = new OBJECT_ATTRIBUTES();

            objAttr.Length     = Marshal.SizeOf(objAttr);
            objAttr.ObjectName = Emit_UNICODESTRING(fullPath);
            objAttr.Attributes = 0x40;
            //objAttr.
            IO_STATUS_BLOCK ioStatusBlock = new IO_STATUS_BLOCK();

            // DesiredAccess = MAXIMUM_ALLOWED; ShareAccess = FILE_SHARE_READ
            UInt32 callResult = NtHardLink.NtOpenFile(ref hFile, 0x02000000, ref objAttr, ref ioStatusBlock, 0x1, 0x0);

            //UInt32 callResult = NtHardLink.NtOpenFile(ref hFile, 0x80000000, ref objAttr, ref ioStatusBlock, 0x0, 0x0);
            if (callResult == 0)
            {
                handle = hFile;
            }
            else
            {
                Console.WriteLine("[!] Failed to acquire file handle, NTSTATUS({0:X})..", callResult);
            }
            return(handle);
        }
Exemplo n.º 3
0
        private static string GetFullPathName(string path)
        {
            string        fullPath         = "";
            StringBuilder lpBuffer         = new StringBuilder();
            IntPtr        fnPortionAddress = IntPtr.Zero;
            UInt32        result           = NtHardLink.GetFullPathName(path, 1, lpBuffer, ref fnPortionAddress);

            if (result != 0)
            {
                int minCapacity = lpBuffer.EnsureCapacity((int)result);
                result   = NtHardLink.GetFullPathName(path, (UInt32)lpBuffer.Capacity, lpBuffer, ref fnPortionAddress);
                fullPath = @"\??\" + lpBuffer.ToString();
                //fullPath = lpBuffer.ToString();
            }
            else
            {
                //big fail
                return("");
            }
            return(fullPath);
        }