Need help to unpack this RAR file

[gr8sight]

I have friend given me this rar file but unfortunately i found out when extract this rar file,it was password protected. I try many tools, search in google but i have failed.

What tools very effective to remove this rar password...:confused:

[zementmischer]

by far the most effective tool to recover the password from this rar archive is:
YOUR FRIEND!!!

even modern gpu-based brute force attacks can't do more than ~20000 pw per second, which means that for any "real world" password you have to wait many decades until you get it (or you 'pass'ed away)

[juanii]

I can tell you my experience since I'm in the middle of cracking a rar file of my own.

First of all, see which RAR version was used to create the archive (it makes a lot of difference if it was 2.x) and other archive characteristics like the compression method (store usually takes longer), encrypted headers (you'll need specific crackers), etc.

So far I've tried crark and Advanced Archive Password Recovery:

crark is free and "fast" (3 times the speed of AAPR in my system). If you have some idea what the password could be you can define a dictionary with something remotely resembling RE's to narrow the passwords space to try. This is absolutely necessary otherwise you won't crack it just like zementmischer said, unless the pass is 5 o 6 chars long. It will even use your GPU if some conditions are met. The interface is good old command line and works under Win/Linux/OSX. I liked it a lot.

The only downside I found in crark (after 45 days of cracking effort) is that it won't work for passwords longer than 28 chars (mine is). So that lead me to AAPR. The dictionary definition is a lot less powerful (if you're trying to do something beyond simple wildcards you must write the dictionary word by word). It has a GUI and works only under Windows. If you can, go for crark.

The only way to overcome crark 28-chars problem is getting a copy of "Parallel RAR Password Recovery". It's based on crark's engine, but it's not free (AFAIK the only full version available is posted in another invitation-only forum).
If by any chance you can get a copy of it please PM me :)

Hope this helps you somehow.

Regards