hashcat Forum

Hello,
    I have a very simple university project that involves creating a MD5 4-char long string hash and then cracking it using brute force/masked attack, very simple premise, did the code in java for hashing and used hashcat 4.2 for brute forcing but the second one just won't work... obviously a mistake on my end since the example templates works fine. 
The hash i'm using is supposed to be MD5, 128-bit long, using ?l?d for charset since the passwords only use those characters and they are 4 char long, so should be very easy to do.
    So lets see: the code for hashcat I used is :
               ./hashcat -m 0 -a 3 -1 ?l?d -O -o=crackedHashes.txt (hash dir) ?1?1?1?1 --potfile-disable
Got this output:


Also I did try to run it with ?h?h?h?h mask
the crackedHashes.txt just isn't generated! and I disabled potfile and enabled it, deleted it, cleaned it, nothing!

These are the hashes, for what I researched, they are supposed to be regular MD5.

5259ee4a034fdeddd1b65be92debe731
4e40beaf133b47b8b0020881b20ad713
58d17e8b3add72032cf54a2f865e3dc4
d39336da4df51fae43b4ecd5848c1356

This is the java function used to hash the strings:

   public static String MD5(String txt) throws NoSuchAlgorithmException {
       MessageDigest m=MessageDigest.getInstance("MD5");
       m.update(txt.getBytes(),0,txt.length());
       return new BigInteger(1,m.digest()).toString(16);
    }

They are just test hashes so their meaning is useless...
Any clue as to why this is happening? Feels like a rookie mistake and I'm just noobing it out

Your hashes seem to be double MD5, so not just md5("abcd") but md5(md5("abcd")). 5259ee4a034fdeddd1b65be92debe731 is "asdf" for example.

If you look at https://hashcat.net/wiki/doku.php?id=hashcat you will see that hashcat supports this method as "-m 2600".

(10-23-2018, 05:16 PM)DanielG Wrote: [ -> ]Your hashes seem to be double MD5, so not just md5("abcd") but md5(md5("abcd")). 5259ee4a034fdeddd1b65be92debe731 is "asdf" for example.

If you look at https://hashcat.net/wiki/doku.php?id=hashcat you will see that hashcat supports this method as "-m 2600".

Yep, that's it! Sorry to bother and thank you very much DanielG!