These, and the fact that the LM algorithm is relatively fast and does not use salts, means that almost any LM hash can be cracked using brute-force or rainbow table attacks in a matter of hours (often minutes or seconds), on commodity hardware. This means that cracking a 14 character password is twice as hard as cracking a 7 character password, rather than being billions of times harder as it would be with an algorithm that did not split the passwords. Secondly, and more importantly, the algorithm pads the password to 14 characters, and then splits it into two 7 character strings, which are hashed separately (using DES). Firstly, it is case insensitive, with all letters being converted to uppercase, which greatly reduces the possible keyspace. The LM hashing algorithm is very old, and is considered very insecure for a number of reasons. Windows stores passwords using two different hashing algorithms – LM (Lan Manager) and NTLM (NT Lan Manager). If you’re not interested in the background, feel free to skip this section. Hash Typesįirst a quick introduction about how Windows stores passwords in the NTDS.dit (or local SAM) files. Now we need to crack the hashes to get the clear-text passwords. In part 1 we looked how to dump the password hashes from a Domain Controller using NtdsAudit.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |