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  • Writer's pictureTimmy TSENG

John the Ripper Jumbo

Installation code required packages

sudo apt-get update

sudo apt-get install libssl-dev

sudo apt-get install build-essential

sudo apt-get install libbz2-dev

Enter src to start compiling and installing

cd john/src

Compile to enable gpu

./configure --enable-opencl

make -s clean && make -sj4

Check how many GPUs and CPUs John can use

./john --list=opencl-devices

Using 4CPU 8RAM cracking speed, it takes 103 hours to crack five lowercase English numbers

Using 4 Tesla T4 GPUs, it only takes 10 hours to crack five lowercase English numbers, which is 10 times faster (the size of this 7z file is about 1G)


Decompress zip archives

~/john/run/john --format=zip-opencl --mask=[mycharset.chr] --min-length=1 --max-length=12 solomon_hash.txt --devices=2,3,4,5 --fork=4


Crack 7z compressed files

perl ~/japan.7z > japan7zhash.txt

If you encounter the following error, it means that the Compress::Raw::Lzma module is missing

Can't locate Compress/Raw/ in @INC (you may need to install the Compress::Raw::Lzma module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.32.1 /usr/local/share/perl/5.32.1 /usr/lib/x86_64-linux-gnu/perl5/5.32 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.32 /usr/share/perl/5.32 /usr/local/lib/site_perl) at line 6.

BEGIN failed -- compilation aborted at line 6.

You need to run the following command to install the missing package:

sudo apt-get install liblzma-dev

sudo cpan Compress::Raw::Lzma

~/john/run/john --format=7z-opencl --mask=[mycharset.chr] --min-length=1 --max-length=8 /home/qoo7972365/japan7zhash.txt --devices=1,2,3,4 --fork=4


./john/run/john --mask=tim my?l?l?l?l?l --min-length=10 --max-length=10 japan7zhash.txt

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