Rb01.7z

Run strings RB01.7z to look for human-readable text that might be visible without extracting, such as hardcoded keys or developer comments. Common Scenarios for "RB01"

You can use an online extractor if the file is small and not sensitive. RB01.7z

To give you a more specific write-up, could you share the of where you found this file (e.g., a specific CTF event or a work project)? Run strings RB01