These problems can all be sorted with a bit of googling or grepping through the john source code. I thought it might be helpful to compile a cheat sheet to reduce the amount of time I spend grepping and googling.
John The Ripper Mac Dmg
Currently, password login is one of the most authentication methods used for security purposes. When you create a log-in password on most secure systems, it is stored in a hashed format. Some of the common hashing algorithms include MD5, SHA-1, SHA-2, NTLM, and LANMAN. For example, if I set my password as john@2021@ and it's hashed with the MD5 algorithm, the resulting password hash will be 5960fe967092ea6724ef5e6adb3ab9c6. When you want to log in, the system will hash the password with the same algorithm and compare the hash with that stored in the database.
From the image, we will crack the password for users johndoe and Karen. Since password cracking can be, at times, a lengthy process for complex passwords, we set the username as the password. We will copy the whole field and save it in a file with a name shadow.hashes on the Desktop. To crack the password hash, we will use the syntax below:
When using a wordlist to crack password hashes, you can set rules to mangle the words in the wordlist to try variations of that word. For example, if we have a word like johndoe, JtR will add numbers to the end of the word and try replacing letters with numbers and adding other random symbols. The resulting output might include:
To crack a zip file, we first need to extract the password hash then crack it with John the Ripper. To extract zip file password hashes, we will use a tool called zip2john. If we were working with a rare file, we would use the tool rar2john to extract the hashes.
root@kali:/Desktop# john crack.txt --format=Raw-MD5 --wordlist: /usr/share/wordlists/rockyou.txt Warning: invalid UTF-8 seen reading /usr/share/wordlists/rockyou.txtUsing default input encoding: UTF-8Loaded 52 password hashes with no different salts (Raw-MD5 [MD5 256/256 AVX2 8x3])Remaining 50 password hashes with no different saltsWarning: no OpenMP support for this hash type, consider --fork=4Press 'q' or Ctrl-C to abort, almost any other key for status0g 0:00:00:00 DONE (2020-05-07 14:50) 0g/s 354600p/s 354600c/s 17730KC/s !@#$%..sssSession completed 2ff7e9595c
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