Irregular Expressions

Feb 22 2011   11:04PM GMT

Using John the Ripper to brute md5 hashes – Part 1



Posted by: Dan O'Connor
Tags:
John The Ripper
md5. jtr

So there is a few types of hashes you may come across, on most Unix type systems you could have a MD5 hash password file.  But not just a MD5 hash, these will include a salt to make the hash unique.

Now other systems will use hashes, say like a web application. Now you could do these with a salt but many web developers ether don’t know this or assume that is already there, you can pick.  With out the salt a string will always hash to the same result on every system, this is a problem.  You could use something like a rainbow table, where you have a pre-hashed password list so you can quickly look up the password.

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