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decrypt salt+hash decrypt salt+hash

03-20-2015 , 03:39 AM
Hey guys,

I am currently doing a hackchallenge/capture-the-flag. Can you help me to decrypt this hash: d79a2543ddbb8042a6d14851fb098e0d
"Hackertag" is the salt.

it was created using: echo -n "Hackertag{Password}" | md5sum

unfortunately I am not familiar with hashcat and don't have a linux setup available for the next few days.

thanks in advance
decrypt salt+hash Quote
03-20-2015 , 02:45 PM
Wouldn't this involve someone having to compute the hash of various, salted dictionary words and looking up a match for the hash you provided?

There are rainbow tables but afaik those are just precomputed hash/plaintext tables so with the salt they won't be effective.

Could probably narrow down the dictionary by either using easy passwords or assumptions about what the password might be.
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03-20-2015 , 03:50 PM
MD5 is a very fast hash.

Just create a list of all chars you think could be in the password (probably A-Z, a-z, 0-9, and some special chars like space, underscore dash etc). Then just loop through every possible string of length 1 then 2, 3, 4 etc etc until you get a hit.
decrypt salt+hash Quote
03-20-2015 , 07:51 PM
Quote:
Originally Posted by Gullanian
MD5 is a very fast hash.

Just create a list of all chars you think could be in the password (probably A-Z, a-z, 0-9, and some special chars like space, underscore dash etc). Then just loop through every possible string of length 1 then 2, 3, 4 etc etc until you get a hit.
i can do this in python but I was more looking for somebody who has knowledge of john the ripper/ hashcat commands.
decrypt salt+hash Quote
03-21-2015 , 07:00 PM
in the end i used "hashcat-cli64.exe -m 20 -a 0 pw.txt random.dic"

pw is "blue"
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