11-20.7z May 2026
: Use a Python script or a bash loop to extract until no more archives remain.
: Extract the hidden flag from a series of nested or obfuscated archives. Step 1: Initial Reconnaissance 11-20.7z
: If the archive is password-protected, look at the filename. In some CTFs (like CodeBattle ), the password is the Base64-decoded version of the filename or a string found in the file metadata. : Use a Python script or a bash
: If you see a string ending in = , it's likely Base64. 11-20.7z
: 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