Date: Thu, 19 Aug 2021 21:45:08 -0400 From: Rich Rumble <richrumble@...il.com> To: john-users@...ts.openwall.com Subject: Re: is it possible to run jumbo john 1.9 on multiple windows machines? 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 > > >
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