If the password is unknown, common CTF passwords or "leaked" credentials from the associated scenario's social media profiles (OSINT) are often tested using John the Ripper or hashcat . Content Extraction and Forensics
A writeup story for “The truth of Plain” | by Kulkan Security | Medium Mojicrimelife all.zip
Use the file command in Linux to confirm the header of all.zip . If the password is unknown, common CTF passwords
Knowing the source can help narrow down the specific solution path. If the password is unknown
To check if all.zip is a "polyglot" file or has other files appended to the end of the archive.