08-07-2021, 02:55 AM
I have am encrypted Zip file containing 20 JPG files each in the 4-12 MB range. I know that the somewhere in the first 256 bytes of each of the original files is the Camera metadata ("Canon EOS 5D Mark III"). Is there anyway of leveraging the fact that I know that this text must exist in the first 256 bytes of each file to use hashcat and/or Zip2John to determine what the password is for this file. I believe the password is probably around 20 characters long but have absolutely no idea what it might be.