The extension .rar indicates a compressed archive file. Such files are often used by threat actors to bypass email scanners. Inside, it likely contains a malicious executable ( .exe , .scr ) or a document with malicious macros (e.g., .docm ).
Scan the file with reputable, updated antivirus software (e.g., Windows Defender, Malwarebytes). M3liss@.rar
If this was received via email, report it to your IT department or as phishing to your email provider. To give you more specific advice, could you tell me: The extension