: Check the archive's "Comment" section; flags are often hidden there to reward those who don't just "Extract All". Step 5: Final Flag Submission
Once you reach the final file (e.g., 20.7z or a flag.txt inside it), the flag is rarely in plain text. Common obfuscations include:
If "11-20" implies a range, this file likely contains 12.7z , which contains 13.7z , all the way to 20.7z or flag.txt .
While there isn't a single famous global CTF challenge exclusively named , this file naming convention is a hallmark of forensics and steganography challenges where players must navigate deeply nested archives or "Russian Doll" files.