ntlmrelayx.py -tf targets.txt -smb2support
A realistic posture Port 5357 embodies a recurring tension in network design: usability-driven discovery vs. the discipline of minimal exposure. In well-run environments, WSD should be an intentional, confined capability: limited to specific subnets, disabled where unnecessary, and logged where used. In under-managed networks it’s a low-effort reconnaissance jackpot for attackers who can already reach local subnets or who can trick users/devices into interacting with malicious peers.
In complex enterprise environments, web service discovery protocols can sometimes be coerced into making outbound requests. If an attacker can inject a malicious URL into a discovery request, they might trigger a Server-Side Request Forgery (SSRF) or force the system to authenticate against a malicious SMB share, capturing NetNTLM hashes. 4. Remediation and Hardening port 5357 hacktricks
The Microsoft-HTTPAPI/2.0 banner confirms a Windows-based web service is running, which helps attackers identify the target OS.
PORT STATE SERVICE 5357/tcp open wsd
WSD provides a network "Plug and Play" experience. It allows a Windows computer to automatically detect and interact with a WSD-compatible printer as if it were connected via USB, without needing to install custom drivers or manually configure IP addresses. This is achieved through HTTP (port 5357), HTTPS (port 5358), and multicast discovery (UDP port 3702).
When you map a network drive or add a network printer in Windows, the system frequently relies on this port to negotiate connections and query device capabilities. 2. Reconnaissance and Enumeration ntlmrelayx
While Port 5357 rarely offers a direct, unauthenticated remote code execution (RCE) vector out of the box, it plays a critical role in lateral movement, information disclosure, and secondary exploitation. A. Information Disclosure
The HackTricks website (https://book.hacktricks.xyz/) provides extensive guides on penetration testing, including detailed information on various ports and protocols. For professionals in cybersecurity, it's a valuable resource for both learning and reference, offering insights into exploit techniques and defense strategies across a wide range of topics. and secondary exploitation. A.
