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Date: Thu, 13 Jun 2013 20:33:58 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: rar2john failing?
On 13 Jun, 2013, at 19:59 , Luis Santana <hacktalk@...ktalk.net> wrote:
> Hey, trying to run rar2john on an OSX system but getting the following output:
>
> ! -hp mode entry found in 1.rar
> 1.rar:$RAR3$*0*0000000000000000*00000000000000000000000000000000:0::::1.rar
>
> The "file" command gives the following:
>
> 1.rar: RAR archive data, v0, os: MS-DOS
>
> And the header of the archive is the following:
>
> [13:58:25 connection@...DOS.local:~/john]$ hexdump -C 1.rar |head
> 00000000 52 61 72 21 1a 07 00 ce 99 73 80 00 0d 00 00 00 |Rar!.....s......|
> 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
> *
> 00000060 00 00 00 00 00 00 00 00 00 00 00 00 cc 0b 7d 38 |..............}8|
> 00000070 34 9f 04 e8 57 e3 7b 70 f3 c7 76 7b b9 19 a9 07 |4...W.{p..v{....|
> 00000080 5b 72 6d eb c6 c5 59 05 51 ff c5 2f 04 ea b9 4a |[rm...Y.Q../...J|
> 00000090 b0 1f d1 c3 e5 b7 f5 6a b9 87 82 1b 19 de d8 3e |.......j.......>|
> 000000a0 11 9d 30 0a d9 66 18 45 6e 77 9d f9 4f 79 ea 1a |..0..f.Enw..Oy..|
> 000000b0 76 21 84 5a 18 4c 4d e4 48 88 58 3e ae 20 92 59 |v!.Z.LM.H.X>. .Y|
> 000000c0 74 a6 10 c5 f2 03 80 fa bc bc a2 05 21 77 c5 f1 |t...........!w..|
>
>
> As this is a file that a client believes is being used to exfiltrate data from the network, I sadly cannot share the archive for debugging purposes but I hope someone has run into this issue in the past and can point me in the right direction.
>
> I hope it's just an OSX issue and I can throw the rar into a Virtual Machine to solve this
Unfortunately rar2john is very generic code and it's tested on OSX. The file(1) output seems to confirm the file is bogus: My bet is it isn't a RAR file at all, it just tries (a little) to look like one.
Try this:
$ dd if=1.rar of=payload bs=$((0x6c)) skip=1
$ file payload
...and perhaps
$ ent payload
But I would not spend too much more time on it than that. You probably won't have a chance to get anything from that file unless you find what created it and rev that.
magnum
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