What hash does NTLM use?

NTLM relies on password hashing, which is a one-way function that produces a string of text based on an input file; Kerberos leverages encryption, which is a two-way function that scrambles and unlocks information using an encryption key and decryption key respectively.

How long does it take to crack NTLM hash?

NTLM hashes of even greater integrity (eight characters + four digits) were estimated to take about two days to crack. For hackers with dedicated brute-force machines, two days is very much within the realm of realistic.

Which tool can brute-force NTLM hashes?

OphCrack It is the most popular Windows password cracking tool but can also be used on Linux and Mac systems. It cracks LM and NTLM hashes. For cracking Windows XP, Vista and Windows 7, free rainbow tables are also available.

Are NTLM hashes salted?

To answer your question: NTLM is unsalted, and NTLMv2 adds a salt, which is exchanged in the messaging. In this case the salt is applied a bit differently — MD5(MD5(password), salt) — because the salt is randomly generated each time, and what’s stored in the authentication database is just MD5(password).

What is LM hash and NTLM hash?

LM hashes are used by LAN Manager (LM) authentication, an old authentication mechanism that predates NTLM authentication. By contrast, NTLM and Kerberos authentication both use Windows NT password hashes (known as NT hashes or Unicode hashes), which are considerably more secure.

Is NTLMv2 safe?

NTLM has two versions – NTLMv1 and NTLMv2. NTLMv2 suppose to offer better security than its previous version, and to some extent it does provides better defense against relay and brute force attacks, but does not completely block them.

How fast can a 6 character password be cracked?

A seven-character complex password could be cracked in 31 seconds, while one with six or fewer characters could be cracked instantly. Shorter passwords with only one or two character types, such as only numbers or lowercase letters, or only numbers and letters, would take just minutes to crack.

Why is NTLM not secure?

Is NTLM secure? NTLM is generally considered insecure because it uses outdated cryptography that is vulnerable to several modes of attacks. NTLM is also vulnerable to the pass-the-hash attack and brute-force attacks.