Carefully extract the contents in a sandbox environment. If the file requires a password (common in CTFs), check associated challenge prompts for clues.
Often analyzed in forensics challenges using tools like Registry Explorer. NR.2.zip
If this file is from a specific (e.g., Hack The Box, PicoCTF, or a corporate training lab), providing the name of the challenge will help in locating the exact solution or walkthrough. Carefully extract the contents in a sandbox environment
Calculate the file's SHA-256 hash and search it on VirusTotal to see if it has been previously flagged by security vendors. Hack The Box
Common items found in such archives include: