MD5($Salt.$Pass.$Salt)

[Metta]

I can't figure out how to crack a certain type of hash

MD5($Salt1.$Pass.$Salt2)

Where salt1 and salt2 are different from each other.

Is this even possible with oclHashcat? If so could someone give me a hint.

[Clutch]

One workaround would be to run the hashes as md5($salt.$pass) and create a rule to append the salt to each word (ex: $s$a$l$t$2), assuming that either all hashes share the same second salt, or you're only running a single hash.

[Metta]

Okay Thanks Clutch, will see if I can get it working.

The way it works is that Salt1 is a static salt so is the same for each hash, however Salt2 is dynamic and unique to each hash.

[epixoip]

all you have to do is crack them as md5(p.s) and stage your attacks to prepend the static salt to each candidate. to emulate a straight dictionary attack you can use -a 7, for rules you can use combinator.bin + stdin + rules, for mask attack just make the salt part of the mask, etc. too easy.