Hi everybody. So I have a RAR archive that I need to get the password to. I would be able to do this but this RAR archive is unlike anything I have previously seen. When you open the password protected archive, you can view the files just like normal. You are only prompted with a password upon extracting the files. I have tried multiple cracking programs. Hashcat, John the Ripper, and cRARk. When I use rar2john, a program supplied with John the Ripper to hash the given archive, it generates a very strange looking hash; one that doesn't work with either hashcat or John. cRARk immediately attempts to crack the first file in the archive. Any idea what to do next? Thanks!
RAR cracking without header encryption is not yet supported
There is a free tool supporting all types of RAR cracking (with or without header encryption) called
cRARk and it's heavily optimized for all CPU architectures, like AVX2, AVX, XOP, AES-NI for Intel Haswell and AMD Bulldozer processors.
It supports only 1 thread for CPU (no multicore) and only one GPU or CPU (not at the same time)
Also, no pause/resume.
Latest v5.1 supports x64 and CUDA
http://www.crark.net/download/crark51.rar for Nvidia cards and x64 and OpenCL
http://www.crark.net/download/crark51-ocl.rar for AMD
For Intel GPUs you have to download previous 5.0c version
http://www.crark.net/download/crark50-ocl.rar which works on Win 10 x64 latest driver.
Some benchmarks on
RAR3 without header encryption:
Radeon 5750 ~2500 pass/s
Intel HD4600@1.5GHz ~760 pass/s
Core i7-4790 (AVX2) ~700 pass/s (Single thread)
Nvidia GT610 ~700 pass/s
Core i5-2400 (AVX) ~300 pass/s (Single thread)
Core 2 Duo@2.86GHz (SSE2) ~200 pass/s (Single thread)