The challenge involves a recursive "Russian Doll" style of nested archives where each layer requires a different extraction or decoding technique to proceed to the next. Challenge Write-up: "Deep"
After several layers (the number varies by version, but often 10+), you will find a final file, usually flag.txt .
: If the content looks like random alphanumeric characters ending in = , use base64 -d .
: If the file is p@ssword.zip , the password is often p@ssword . 4. Decoding and Hex Analysis Some layers may not be archives but encoded text files.
: Use xxd or a hex editor to look for magic bytes (e.g., 50 4B for ZIP) if the file command fails. 5. Finding the Flag