: Extract the hash using zip2john rg1.zip > hash.txt and then run john hash.txt with a wordlist like RockYou.
: Run binwalk -e rg1.zip to scan the file for hidden, nested, or appended signatures and automatically extract them. rg1.zip
If the file is encrypted with legacy ZipCrypto and you happen to know or possess one of the uncompressed files resting inside the ZIP, you can extract the encryption keys without knowing the password: : Extract the hash using zip2john rg1
: Run strings rg1.zip to see if there is any plaintext flag or readable developer commentary left in the binary data. If the ZIP is corrupted or embedded inside
If the ZIP is corrupted or embedded inside another file (like an image):
Attackers and CTF creators often change file extensions to confuse players. : file rg1.zip
: Run fcrackzip -u -D -p rockyou.txt rg1.zip to search for dictionary-based passwords. 3. Known Plaintext Attack (Pkcrack)