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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