Decoder - Ntlm

When you capture network traffic (the Type 3 message), you are capturing a response. This is different from the stored NTLM hash.

A widely used extension for web application testing that automatically decodes NTLM headers found in HTTP requests/responses.

NTLM (NT LAN Manager) is an authentication protocol used in Windows environments. An NTLM decoder helps convert captured NTLM hash strings or NTLM messages into a human-readable format, revealing components like username, challenge, response, and hash type. ntlm decoder

The more security-critical aspect of NTLM decoding is the password hash.

Windows does not store user passwords in clear text. It stores them as an NTLM Hash. When you capture network traffic (the Type 3

To understand decoding, you must first understand the three-step handshake (Type 1, Type 2, Type 3):

In the world of Windows networking and cybersecurity, is a suite of Microsoft security protocols used for authentication. While modern Windows environments prefer Kerberos, NTLM is still widely used for legacy applications and local network authentication. NTLM (NT LAN Manager) is an authentication protocol

An NTLM decoder takes the Base64-encoded NTLM message and parses it according to the Microsoft MS-NLMP protocol specifications. NTLM communication typically involves three distinct message types, and a decoder helps identify which stage the communication is in:

While a decoder doesn't reveal the plain-text password (it only shows the encrypted hash), the metadata it reveals can be used for or brute-forcing . To mitigate these risks, organizations are encouraged to enforce NTLMv2 , audit server configurations regularly, and transition toward more modern protocols like Kerberos.

NTLM is a challenge-response authentication protocol. Unlike basic authentication (which sends passwords in Base64 encoding), NTLM never sends the actual password across the network. Instead, it uses a mathematical process to prove the user knows the password.

An NTLM decoder parses these messages to reveal metadata such as workstation names, domain details, and security flags . Key Components Decoded