11-20.7z

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 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 Once you reach the final file (e

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 . Step 5: Final Flag Submission If "11-20" implies

: Right-click, extract, repeat. This is inefficient for 10+ layers.

: 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