![]() Now, make a cup of coffee, sit back and wait for John to do its thing. $ john -rules -wordlist=yourwordlist.txt hash.txt Now, under "run" you can also find a python script, office2john.py: you can use it for extract the hash from the encrypted XLSX file: If everything goes well, the executables for John and its related utilities will be created under "./run/". The correct way is to extract the password hash from the file and then cracking it using John The Ripper.įor this purpose, you need to get a ' jumbo' build of John The Ripper, that supports Office files cracking. As it is encrypted nothing could be tweaked by opening the document with a hex editor. ![]() The encryption algorithm of encrypted Microsoft Excel files is 40bit RC4. I did it,and now i'd like to share workflow for XLSX cracking. Let’s take the one for the 64-bit operating system. Click on the one as per your system configuration. ![]() Step 2: There are two options available for windows one is 1.9.0-jumbo-1 64-bit Windows and the other is 1.9.0-jumbo-1 32-bit Windows. Obviously, the file was password protected, and I had to find a way to read it. Step 1: Visit the official website of John the ripper using any web browser. Recently, during a forensic analysis on a laptop of an employee charged with corporate espionage, I've carved from disk a suspicious Excel file. ![]()
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