4/22/2021 0 Comments Decrypt Sam File Windows 7
Its my understanding that the NT hash is only used as an NTLMv1 authentication response, but it is possible that it is used as an exploitable weakness in retrieving passwords.
![]() When you get the password, you only have to bruteforce uppercase and lowercase characters to make it match the NT hash. From Wikipedia: The LM hash is computed as follows. The users password as an OEM string is converted to uppercase. This password is either null-padded or truncated to 14 bytes. The fixed-length password is split into two 7-byte halves. These values are used to create two DES keys, one from each 7-byte half, by converting the seven bytes into a bit stream, and inserting a zero bit after every seven bits. This generates the 64 bits needed. Each of these keys is used to DES-encrypt the constant ASCII string email protected, resulting in two 8-byte ciphertext values. These two ciphertext values are concatenated to form a 16-byte value, which is the LM hash. Thanks Uber0n:happy: im really lucky that you saw the thread Edited by on 18-10-07 08:00. Since LM hashes are a compatibility feature, theyre an easy target. Vista doesnt store LM hashes by default (not even sure if it can at all, not that youd want to). Also, you can disable the storage of LM hashes in Windows XP, too, which is highly recommended. For example, I cracked net2hand, which is 8 letters; the d on the end I got through dictionary, whereas I had to bruteforce the rest of it for about an hour and a half. They become incredibly time-consuming after about 10 letters: Hope I made sense and you understand that a little better, I dont much understand sams but this is one thing Im ok with. Thanks i didnt know that:happy: No, you dont have to edit the hashes. Good luck with yours. Ok.Thanks Zephyr for your reply:happy: If its longer than 7 characters, it is essentially 2 passwords, at least for the sake of cracking. For example, I cracked net2hand you got net2han from the LM hash only right which is 8 letters; the d on the end I got through dictionary, whereas I had to bruteforce the rest of it for about an hour and a half. They become incredibly time-consuming after about 10 letters: how did you bruteforce the rest. Hope I made sense and you understand that a little better, I dont much understand sams but this is one thing Im ok with. Sometimes the initialization vector, a previously generated (preferably random) value, is used as a salt. The output of the key derivation function is often stored as the encrypted version of the password. A salt value can also be used as a key for use in a cipher or other cryptographic algorithm. The NT hash, alternatively, is the MD4 hash of the password, and shouldnt be crucial in cracking the LM hashes.
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