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Date: Tue, 10 Jan 2012 14:07:54 +0530
From: Dhiru Kholia <>
Subject: Re: official JtR or jumbo for RAR?

On Tue, Jan 10, 2012 at 11:36 AM, Chuck Kahn
<> wrote:
> Which will work faster at cracking RAR passwords -- the official JtR or
> jumbo?

Official JtR doesn't have support for cracking RAR files in-built.

> $ /usr/local/Cellar/john/john-1.7.9-jumbo-5/run/john --format=rar
>> --incremental:all testabc.rar
>> No password hashes loaded (see FAQ)
> The FAQ doesn't provide detail on how to use "--format=rar" for jumbo JtR.
>  How do I proceed with jumbo and RAR?

If you are using jumbo then first run rar2john tool on your RAR files
rar2john testabc.rar > rardump

Then run john on the generated rardump file.

john --format=rar rardump

Using jumbo should be faster than your shell script. However cracking
RAR files is extremely slow in general.


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