: 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)
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 11-20.7z
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 . : Use 7z l -slt 11-20
: Confirms it is a 7-Zip archive. If the header was missing or corrupted, you would need to manually fix the magic bytes ( 37 7A BC AF 27 1C ). Step 2: Password Extraction (The "Base64" Trick) : file 11-20
: The content might be XORed with a static key (e.g., FlareOn2024 ).
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