Need Help: Trying to Brute Force a salted SHA1 hash for a geocaching puzzle.
#5
Thanks for such a quick reply.
I have to go out this morning, but will give it a try this afternoon.
Once I've got it or run into a brick wall, I'll post a note in the forum.

hashcat sounds like the perfect program for this type of puzzle.
I'm surprised that nobody has ever mentioned in in geocaching circles.
I can see the potential for my own puzzles using some of its other features.

(11-20-2011, 11:15 AM)atom Wrote: Hey Geocacher,

much thanks for asking us for support in this challange Smile

There are many ways to solve this problem, but the one I prefer when it comes to single hashes and partially known plaintext is using oclHashcat-lite:

Quote:oclHashcat-lite64 -m 100 8882caa3b88a5a16fad6287e26d8a8f9454ad643 "PEPPERN51 03.?d?d?d W114 07.?d?d?d"

You do not have access to a GPGPU enabled card in your iMac, but you can use CPU based hashcat:

1. open notepad, place the hash 8882caa3b88a5a16fad6287e26d8a8f9454ad643 on the first line and save it as "hash.txt"

2. open cmd windows and type:

Quote:mp64 "PEPPERN51 03.?d?d?d W114 07.?d?d?d" -o wordlist.txt
hashcat-cli64 -m 100 hash.txt wordlist.txt

The tool "mp64.bin" is the maskprocessor, one of the tools of the hashcat suite. See here for download link: http://hashcat.net/wiki/maskprocessor

I have it cracked. I just dont want to post it here and destroy the challange this way. If you need the result PM me.



Messages In This Thread
RE: Need Help: Trying to Brute Force a salted SHA1 hash for a geocaching puzzle. - by Geocacher - 11-20-2011, 04:22 PM