Tool to crack RAR archive with one file with known content?

Need a tool? Ask here if someone knows one that does what you need, or maybe someone can even write you one.
Post Reply
r00tb33r
n00b
Posts: 1
Joined: Fri Apr 10, 2015 7:16 am

Tool to crack RAR archive with one file with known content?

Post by r00tb33r » Fri Apr 10, 2015 7:25 am

Some asshole uploaded a passworded RAR archive with source code I need, and tries to extort $200 from anyone who wants it. He didn't even write that shit, stole it from some forum. F*** that asshole. Let's crack it.

I have the EXACT contents of one of the text files, it's only 371 bytes. Would this be enough for efficient attack? I think the password length is 24 characters... But with known contents for one of the files, is it possible?

What tool could work with known archive contents?

Help is much appreciated.

User avatar
Cool_Fire
Not a sandwich
Posts: 1912
Joined: Fri May 09, 2003 1:20 pm
Location: 41 6d 73 74 65 72 64 61 6d
Contact:

Re: Tool to crack RAR archive with one file with known conte

Post by Cool_Fire » Mon Apr 13, 2015 9:18 pm

You can do something called a known-plaintext attack, but I don't know of any tools off hand that do it for rar archives.
If you do find a tool that will do it, you're in with a reasonable chance of finding the key at least.
If we're breaking the rules, then how come you can't catch us? You can't find us? I know why. Cause, it's ... MAGIC!
Hackerthreads chat, where the party is going 24/7.

Post Reply