The extracted file (often a text file or image) will contain the flag. Key Tools to Use fcrackzip: For password-protected zip archives . 7zip (7z): For listing and extracting archives. strings: To look for readable text in binary files.

Use zipinfo -v lucifer.zip or 7z l -slt lucifer.zip to check if it is encrypted.

Since the password is not provided, you must brute-force it. The most common tool for this is fcrackzip .

Note: Using the rockyou.txt dictionary file is generally sufficient for piconCTF/picoGym challenges.