How to test(crack) RAR?

Hello everyone, I have a rar archive, how I can crack it on, can step through write how to do it?

C:\Users\John\Desktop\HASHCAT\cudaHashcat-1.37>cudaHashcat64  -w 3 -a ?d?d?d?d?d?d?d?d  filename.rar  

But Im have Error.

cudaHashcat v1.37 starting...

Usage: cudaHashcat64 [options]... hash|hashfile|hccapfile [dictionary|mask|direc
tory]...

If I need to get the hash - RAR, then how to do it?


What am I doing wrong, thanks for the help.))