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Why does pass the hash work?
In cryptanalysis and computer security, pass the hash is a hacking technique that allows an attacker to authenticate to a remote server or service by using the underlying NTLM or LanMan hash of a user’s password, instead of requiring the associated plaintext password as is normally the case.
What is hash pass?
When a password has been “hashed” it means it has been turned into a scrambled representation of itself. A user’s password is taken and – using a key known to the site – the hash value is derived from the combination of both the password and the key, using a set algorithm.
Why crack when you can pass-the-hash?
A weakness exists in the design of Windows unsalted password hashing mechanism. The static nature of this password hash provides the means for someone to masquerade as another user if the victim’s hash can be obtained.
Why crack when you can pass the hash?
What are pass the hash and pass the ticket attacks?
A Pass-the-Hash (PtH) attack is a technique whereby an attacker captures a password hash (as opposed to the password characters) and then simply passes it through for authentication and potentially lateral access to other networked systems.
How does a pass the hash attack work?
So, if an attacker can harvest hash values of passwords and try them to impersonate a user, he can break into the server. In a Pass The Hash attack, the attacker uses this mechanism. In this attack, the attacker uses LM or NTLM authentication instead of using some brute force mechanism to obtain the cleartext password from its hash value.
How is pass the hash used in lateral movement?
Pass-the-hash is a credential theft and lateral movement technique in which an attacker can abuse the challenge-and-response nature of the NTLM authentication protocol to authenticate as a user with only the NTLM hash of the user’s password.
Why is Windows vulnerable to pass the hash attacks?
Typically, pass the hash attacks are directed at Windows systems, but can also work against other OSes in some instances and any authentication protocol such as Kerberos. Windows is especially vulnerable to these attacks because of its single sign-on (SSO) function that allows users to enter the password once to access all resources.
How can an adversary obtain a password hash?
Step 1: There are a number of methods by which an adversary can obtain password hashes once they have gained a foothold in a network. The most common of these is to extract password hashes from the LSASS.exe process memory, which stores hashes for users with active sessions to the computer.