Users' questions

What is pass the hash in security?

What is pass the hash in security?

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.

Does pass the hash still work?

Even though Kerberos has replaced NTLM as the preferred authentication method for Windows domains, NTLM is still enabled in many Windows domains for compatibility reasons. And so, pass the hash attacks remain an effective tool in the hands of skilled attackers.

What is pass the hash vulnerability?

A pass the hash attack is an exploit in which an attacker steals a hashed user credential and — without cracking it — reuses it to trick an authentication system into creating a new authenticated session on the same network.

Does pass the hash work on Windows 10?

Windows 10 uses NT hashes, and therefore they fall in the scope of this paper. Authentication protocols, NTLMv1 and NTLMv2 in particular, do not pass NT hashes on the network, but rather pass values derived from the NT hashes, called NTLMv1 and NTLMv2 hashes, respectively.

Why would an attacker want password hashes?

Hashing is almost always preferable to encryption when storing passwords inside databases because in the event of a compromise attackers won’t get access to the plaintext passwords and there’s no reason for the website to ever know the user’s plaintext password.

What’s the difference between pass the hash and pass the ticket?

One primary difference between pass-the-hash and pass-the-ticket, is that Kerberos TGT tickets expire (10 hours by default) whereas NTLM hashes only change when the user changes their password. So a TGT ticket must be used within its lifetime, or it can be renewed for a longer period of time (7 days).

Can Kerberos be hacked?

Can Kerberos Be Hacked? Yes. Because it is one of the most widely used authentication protocols, hackers have developed several ways to crack into Kerberos. Most of these hacks take advantage of a vulnerability, weak passwords, or malware – sometimes a combination of all three.

Does Kerberos prevent pass-the-hash?

Kerberos may be able to reduce pass-the-hash risk in some specific scenarios, but it doesn’t significantly reduce risk in most environments.

Does Windows Salt password hash?

While Windows doesn’t currently use salting, they can encrypt stored hashes if you use the ‘SYSKEY’ tool. You can also use ’rounds’, or hashing a password multiple times.

How are hashes used by hackers?

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.

How do hackers get hashes?

The sensitive information such as passwords and credit card information are stored in the Database in encrypted format by making use of this algorithms. By leveraging SQL injection, the attacker can fetch the hashed passwords stored on the backend DB and can attempt to crack it.

Is Kerberos authentication secure?

Kerberos is far from obsolete and has proven itself an adequate security-access control protocol, despite attackers’ ability to crack it. The primary advantage of Kerberos is the ability to use strong encryption algorithms to protect passwords and authentication tickets.

What is the Microsoft pass the hash attack?

Microsoft confirms that 99% of cases reported to Microsoft consulting services for corporate networks being owned by a malware, is by using this technique. Any system that supports Single-Sign On SSO is affected by the pass the hash attack.

Which systems are affected by the pass the hash attack?

Any system that supports Single-Sign On SSO is affected by the pass the hash attack. SSO in simple terms is when somebody uses his credentials to log on to a system, and some form of that credentials or the actual credential allows him to go and access other resources without retyping his credentials.

Is it possible to fix the hash attack?

In other words, if you want SSO, pass the hash attack is something that cannot be fixed and you must accept. Credential reuse: using the saved credentials on the system on which it was saved. Credential theft: taking the saved credential to another system and using it from there and allow attacker to spread over the network.

What is pass-the-hash attack?

Suspected identity theft (pass-the-hash) (external ID 2017) Previous name: Identity theft using Pass-the-Hash attack. Description. Pass-the-Hash is a lateral movement technique in which attackers steal a user’s NTLM hash from one computer and use it to gain access to another computer. MITRE