: Before opening, upload the file to a tool like VirusTotal to check it against dozens of different antivirus engines.

: Simply downloading the file is generally safe, but extracting or running an executable (.exe or .bat) from inside the archive can immediately compromise your system.

If "Claws" refers to a specific game expansion, you might be looking for:

: Ensure your extraction tool (like WinRAR) is up to date, as older versions have had high-severity "booby-trapped" archive vulnerabilities (e.g., CVE-2025-6218). Recommended Steps Before Opening

A .rar file is a compressed archive. While the format itself is not a virus, it is frequently used to bundle and hide malicious programs.