: Upload the file to the VirusTotal Malware Scanner . This tool checks the file against over 70 different antivirus engines to see if it matches any known threats.

: Before opening, right-click the file to view "Properties." Look for a "Digital Signatures" tab; legitimate software often has a verifiable signature from a known developer.

: They are used to save space or make large folders easier to send via email.

Because this file is not a known public utility, you should treat it with extreme caution. Compressed archives like .rar files are frequently used by cybercriminals to bypass security scanners and deliver malware.

A .rar file is a "Roshal Archive," a proprietary format used for data compression and bundling multiple files into one smaller package.

: Confirm with the sender (via a different communication channel) that they intended to send this specific file. If it came from an unexpected email or a random download link, it is likely malicious.