Right-click the file and scan it with your antivirus (Windows Defender, Malwarebytes, etc.).

Because the filename is non-descriptive, it is important to verify its safety before extracting the contents:

If you found this on an old drive, it may be a compressed folder of personal files. 2. How to Open the File

A lightweight, free app for Mac users to extract RAR archives. 3. Safety First

Since .rar is a proprietary compression format, Windows and macOS cannot always open them natively without specific software. You will need one of the following: The official tool for .rar files.