Cryptography Challenges

Openssl

John the Ripper can be used to bruteforce passwords.

Turn the pdf file to usable with John.

pdf2john <pdf_file_here> <output_hashfile_name_here>

Brute the generated file with John:

john --wordlist=/usr/share/wordlists/rockyou.txt <output_hashfile_name_here>

Hashcat can be used to bruteforce passwords and to generate mutations from words.

Rule for case toggling can be found here Custom rules can be inserted into a file and used.

Mutate a word or wordlist:

Create a wordlist, e.g. echo "Bob" > wordlist.txt

Then use this wordlist for mutation from Hashcats pre shipped rule:

hashcat --force --stdout wordlist.txt -r /usr/share/hashcat/rules/leetspeak.rule > leet_wordlist.txt

Same can be done for custom rules, just replace the rule file.

Access CyberChef from here