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Date: Fri, 20 Aug 2021 11:36:59 +0200
From: Harlock <harlock8@....it>
To: john-users@...ts.openwall.com
Subject: Re: is it possible to run jumbo john 1.9 on multiple
windows machines?
On 8/20/21 3:45 AM, Rich Rumble wrote:
> The bitlocker you are trying to recover, isn't likely to be recovered
> soon... The use-case for JtR is likely the "BitLocker To Go" scenario,
> where a user puts in a password to protect a Thumb Drive /USB Drive. I
> believe BL keys are 48 digits, which is a LOT, even if the keyspace is 0-9.
> You may be better served looking at M$'s site:
> https://docs.microsoft.com/en-us/windows/security/information-protection/bitlocker/bitlocker-recovery-guide-plan
> Again if your drive is using TPM and or some Key you don't have a back up
> of or access too... I don't think you'll crack 48 digits anytime soon.
> At just 16 digits, that's a key space of 36587558241570175048828125000000,
> and if you get let's say 6.8M hashes per second, times 86400 seconds in a
> day...
> 36587558241570175048828125000000 / (6800000 * 86400)
> equals... a lot. Your key is not likely 99999-99999-999999 etc... but even
> brute-forcing at 16 pure digits at the speeds advertised on bitcracker
> https://github.com/e-ago/bitcracker#performance makes it seem pretty slim.
> You may want to contact that developer and see if they have any tips? They
> helped create the format for JtR, I am not sure they are on the John User's
> list.
>
> On Thu, Aug 19, 2021 at 8:45 PM Harlock <harlock8@....it> wrote:
>
>> On 8/19/21 1:12 PM, Rich Rumble wrote:
>>> If you're running a jumbo version of JtR you should have the option to
>> run
>>> node and or fork, but I can't say if those work with GPU cracking.
>>> https://www.openwall.com/john/doc/OPTIONS.shtml
>>> Looks like Fork will work with OpenCL
>>> https://www.openwall.com/lists/john-users/2013/09/08/1
>>> Have a look at JtR's other documentation on parrallelization:
>>>
>> https://openwall.info/wiki/john/parallelization#Built-in-MPI-parallelization-support
>>> To use John's OpenMP support, you need to either use an existing
>>> OpenMP-enabled build (e.g., "john-omp.exe" on Windows)
>>> https://www.openwall.com/john/doc/FAQ.shtml (distributed processing)
>>> -rich
>>>
>>> On Wed, Aug 18, 2021 at 8:36 AM Harlock <harlock8@....it> wrote:
>>>
>>>> Hi all,
>>>>
>>>> I 'm actually running this task on windows:
>>>>
>>>> john.exe --format=bitlocker-opencl
>>>>
>> --mask=?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d
>>>> hash_to_crack.txt
>>>>
>>>> I read about the --node option and I was wondering if I can split the
>>>> work among multiple machines, if yes, can you please support me to
>>>> configure the process?
>>>>
>>>> Thanks in advance for the support
>>>>
>>>>
>>> Hi Rich,
>>>
>>> thanks for your reply, I've seen a tutorial for Linux about it:
>>>
>>>
>> https://countuponsecurity.com/2015/05/07/step-by-step-clustering-john-the-ripper-on-kali/comment-page-1/?unapproved=31054&moderation-hash=1bb2f13bba181b1b653e64473da8c3c0#comment-31054
>>> I'm wondering if I can use this one as start for the configuration of
>> the openmp side.
>>> also according to Magnum that reply me too, it seems this crack is
>> pointless as it cannot be done in a "human" time, I'm wondering if there is
>> another way to sort my issue that is basically this one:
>>>
>> https://www.dell.com/community/Windows-10/BitLocker-need-a-key-but-I-never-installed-it/td-p/6019486
>>> I've already tried all of the suggestions inside but none of them are
>> working
>>> Regards
>>
>>
Hi Rich,
thanks for your suggestions, I will try to contacht the bitcracker
author to understand if can provide me some good trick too.
As this laptop is from a friend of mine and he asked too a recovery data
company to know if it's possible to access is date, they can do it for
1000€ so I'm wondering what kind of attack they gonna use on this
bitlocker drive, do you have any idea?
Regards
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