launch process from Session 0 Isolation

Using the example I found at code project I got a partial solution. The example in the link above will launch a process as the user who is running the "winlogon" process. In order to launch a process as the user who is logged in I just changed the process to look for "explorer" instead.

Here is a snippet of the original code

// obtain the process id of the winlogon process that is // running within the currently active sessionProcess[] processes = Process.GetProcessesByName("winlogon");

I just change the process to look for explorer.

Process[] processes = Process.GetProcessesByName("explorer");

Now the process launches as domain/me in Session 3 as a user not admin.

There has to be issues with this approach, such as Remote Desktop, but for what I want this will ultimately do.

Here is the final code for completeness in case the original link evaporates.

Here is how to launch it

// the name of the application to launchString applicationName = "cmd.exe";// launch the applicationApplicationLoader.PROCESS_INFORMATION procInfo;ApplicationLoader.StartProcessAndBypassUAC(applicationName, out procInfo);

Here is the code

using System;using System.Diagnostics;using System.Runtime.InteropServices;using System.Security;namespace SuperAwesomeNameSpaceOfJustice{    /// <summary>    /// Class that allows running applications with full admin rights. In    /// addition the application launched will bypass the Vista UAC prompt.    /// </summary>    public class ApplicationLoader    {        #region Structures        [StructLayout(LayoutKind.Sequential)]        public struct SECURITY_ATTRIBUTES        {            public int Length;            public IntPtr lpSecurityDescriptor;            public bool bInheritHandle;        }        [StructLayout(LayoutKind.Sequential)]        public struct STARTUPINFO        {            public int cb;            public String lpReserved;            public String lpDesktop;            public String lpTitle;            public uint dwX;            public uint dwY;            public uint dwXSize;            public uint dwYSize;            public uint dwXCountChars;            public uint dwYCountChars;            public uint dwFillAttribute;            public uint dwFlags;            public short wShowWindow;            public short cbReserved2;            public IntPtr lpReserved2;            public IntPtr hStdInput;            public IntPtr hStdOutput;            public IntPtr hStdError;        }        [StructLayout(LayoutKind.Sequential)]        public struct PROCESS_INFORMATION        {            public IntPtr hProcess;            public IntPtr hThread;            public uint dwProcessId;            public uint dwThreadId;        }        #endregion        #region Enumerations        enum TOKEN_TYPE : int        {            TokenPrimary = 1,            TokenImpersonation = 2        }        enum SECURITY_IMPERSONATION_LEVEL : int        {            SecurityAnonymous = 0,            SecurityIdentification = 1,            SecurityImpersonation = 2,            SecurityDelegation = 3,        }        #endregion        #region Constants        public const int TOKEN_DUPLICATE = 0x0002;        public const uint MAXIMUM_ALLOWED = 0x2000000;        public const int CREATE_NEW_CONSOLE = 0x00000010;        public const int IDLE_PRIORITY_CLASS = 0x40;        public const int NORMAL_PRIORITY_CLASS = 0x20;        public const int HIGH_PRIORITY_CLASS = 0x80;        public const int REALTIME_PRIORITY_CLASS = 0x100;        #endregion        #region Win32 API Imports        [DllImport("kernel32.dll", SetLastError = true)]        private static extern bool CloseHandle(IntPtr hSnapshot);        [DllImport("kernel32.dll")]        static extern uint WTSGetActiveConsoleSessionId();        [DllImport("advapi32.dll", EntryPoint = "CreateProcessAsUser", SetLastError = true, CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]        public extern static bool CreateProcessAsUser(IntPtr hToken, String lpApplicationName, String lpCommandLine, ref SECURITY_ATTRIBUTES lpProcessAttributes,            ref SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandle, int dwCreationFlags, IntPtr lpEnvironment,            String lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation);        [DllImport("kernel32.dll")]        static extern bool ProcessIdToSessionId(uint dwProcessId, ref uint pSessionId);        [DllImport("advapi32.dll", EntryPoint = "DuplicateTokenEx")]        public extern static bool DuplicateTokenEx(IntPtr ExistingTokenHandle, uint dwDesiredAccess,            ref SECURITY_ATTRIBUTES lpThreadAttributes, int TokenType,            int ImpersonationLevel, ref IntPtr DuplicateTokenHandle);        [DllImport("kernel32.dll")]        static extern IntPtr OpenProcess(uint dwDesiredAccess, bool bInheritHandle, uint dwProcessId);        [DllImport("advapi32", SetLastError = true), SuppressUnmanagedCodeSecurity]        static extern bool OpenProcessToken(IntPtr ProcessHandle, int DesiredAccess, ref IntPtr TokenHandle);        #endregion        /// <summary>        /// Launches the given application with full admin rights, and in addition bypasses the Vista UAC prompt        /// </summary>        /// <param name="applicationName">The name of the application to launch</param>        /// <param name="procInfo">Process information regarding the launched application that gets returned to the caller</param>        /// <returns></returns>        public static bool StartProcessAndBypassUAC(String applicationName, string startingDir, out PROCESS_INFORMATION procInfo)        {            uint winlogonPid = 0;            IntPtr hUserTokenDup = IntPtr.Zero, hPToken = IntPtr.Zero, hProcess = IntPtr.Zero;            procInfo = new PROCESS_INFORMATION();            // obtain the currently active session id; every logged on user in the system has a unique session id            uint dwSessionId = WTSGetActiveConsoleSessionId();            // obtain the process id of the winlogon process that is running within the currently active session            // -- chaged by ty             // Process[] processes = Process.GetProcessesByName("winlogon");            Process[] processes = Process.GetProcessesByName("explorer");            foreach (Process p in processes)            {                if ((uint)p.SessionId == dwSessionId)                {                    winlogonPid = (uint)p.Id;                }            }            // obtain a handle to the winlogon process            hProcess = OpenProcess(MAXIMUM_ALLOWED, false, winlogonPid);            // obtain a handle to the access token of the winlogon process            if (!OpenProcessToken(hProcess, TOKEN_DUPLICATE, ref hPToken))            {                CloseHandle(hProcess);                return false;            }            // Security attibute structure used in DuplicateTokenEx and CreateProcessAsUser            // I would prefer to not have to use a security attribute variable and to just             // simply pass null and inherit (by default) the security attributes            // of the existing token. However, in C# structures are value types and therefore            // cannot be assigned the null value.            SECURITY_ATTRIBUTES sa = new SECURITY_ATTRIBUTES();            sa.Length = Marshal.SizeOf(sa);            // copy the access token of the winlogon process; the newly created token will be a primary token            if (!DuplicateTokenEx(hPToken, MAXIMUM_ALLOWED, ref sa, (int)SECURITY_IMPERSONATION_LEVEL.SecurityIdentification, (int)TOKEN_TYPE.TokenPrimary, ref hUserTokenDup))            {                CloseHandle(hProcess);                CloseHandle(hPToken);                return false;            }            // By default CreateProcessAsUser creates a process on a non-interactive window station, meaning            // the window station has a desktop that is invisible and the process is incapable of receiving            // user input. To remedy this we set the lpDesktop parameter to indicate we want to enable user             // interaction with the new process.            STARTUPINFO si = new STARTUPINFO();            si.cb = (int)Marshal.SizeOf(si);            si.lpDesktop = @"winsta0\default"; // interactive window station parameter; basically this indicates that the process created can display a GUI on the desktop            // flags that specify the priority and creation method of the process            int dwCreationFlags = NORMAL_PRIORITY_CLASS | CREATE_NEW_CONSOLE;            // create a new process in the current user's logon session            bool result = CreateProcessAsUser(hUserTokenDup,        // client's access token                                            null,                   // file to execute                                            applicationName,        // command line                                            ref sa,                 // pointer to process SECURITY_ATTRIBUTES                                            ref sa,                 // pointer to thread SECURITY_ATTRIBUTES                                            false,                  // handles are not inheritable                                            dwCreationFlags,        // creation flags                                            IntPtr.Zero,            // pointer to new environment block                                             startingDir,                   // name of current directory                                             ref si,                 // pointer to STARTUPINFO structure                                            out procInfo            // receives information about new process                                            );            // invalidate the handles            CloseHandle(hProcess);            CloseHandle(hPToken);            CloseHandle(hUserTokenDup);            return result; // return the result        }    }}