Use the strings command to look for plaintext passwords inside the binary.
Use a hex editor to ensure it's actually a RAR file and not a renamed JPEG or EXE. Sup3rc00l.rar
Where did you ? (e.g., a specific website, Discord, or course?) Use the strings command to look for plaintext
If it's a known lab file, tools like John the Ripper or Hashcat are often used with a wordlist (like rockyou.txt ). a specific website