: 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.
Flare-on 11 Challenge 5 Write-up — SSHD: | by Raviv Rachmiel 11-20.7z
: Use a Python script or a bash loop to extract until no more archives remain. : If the archive is password-protected, look at the filename
import subprocess import os filename = "11-20.7z" while True: # Attempt to extract. -p can be used if there's a known password. result = subprocess.run(["7z", "x", filename, "-y"], capture_output=True) # Logic to find the next .7z file in the directory next_files = [f for f in os.listdir('.') if f.endswith('.7z') and f != filename] if not next_files: break filename = next_files[0] print(f"Extracted: filename") Use code with caution. Copied to clipboard import subprocess import os filename = "11-20
The first step is always to identify what you are dealing with. Using the file command in Linux or a hex editor like 010 Editor helps verify the file header. : file 11-20.7z
: Use 7z l -slt 11-20.7z to view technical details and comments that might contain hints. Step 3: Handling the Recursion (The "Nested" Problem)