hashcat recovers null results
#1
I was hoping someone can explain hashcat behaviour.

I have bunch of hashes (sha512($pass.$salt)) which I run against dictionary and hashcat recovers them as null. They can be different hashes with different salts, but hashcat still recovers them as null.

Basically, output looks like [hash]:[salt]:      ...and then nothing.

Am I missing out something?
#2
Just to be really really sure, if you do sha512($salt) on for example https://passwordsgenerator.net/sha512-hash-generator/ you don't get the hash in your output?
#3
Yes, it does actually. What would that mean?
#4
That hashcat is correctly showing the results. There is no password for those hashes you have, only a salt. Depending on your source this might be logical.
#5
Makes sense, thank you, Daniel.
#6
Although I don't fully understand, why there will need to be salt if no password?

I believe this is something to do with 'Windows Authentication' when users authenticate using Windows logon. But again why unique salt needed to be generated and as a password used encoded salt?!