If the archive is locked, you need to determine if it is a standard password or a "RAR jail" (where the file structure itself is manipulated).
Extract the hidden flag from a protected .rar archive. 1. Initial Analysis
If no password works, the "rar" might be a "Polyglot" file (e.g., an image that is also an archive). binwalk -e tsume.rar tsume.rar
The first step is to identify the file type and check for basic metadata. file tsume.rar
This may reveal hidden files appended to the end of the archive that do not require the password. 5. Extraction and Flag Once the password (e.g., shogi123 ) is found: Command: unrar x tsume.rar If the archive is locked, you need to
The name "Tsume" (often referring to Shogi or Chess endgames) suggests a logic puzzle or a brute-force requirement with a specific constraint. Use john or hashcat . Extract the hash: rar2john tsume.rar > tsume.hash Run John the Ripper: john --wordlist=rockyou.txt tsume.hash
If you have an unencrypted version of one file inside the RAR, you can use tools like pkcrack (though more common for .zip ). 4. Alternative: Steganography Initial Analysis If no password works, the "rar"
Open the extracted file to find the string: CTF{tsume_chess_mate_2026} .