Use WinRAR (the native format creator) or 7-Zip (free and open-source).
Encrypted .rar files with randomized names almost always require a password. Common "default" passwords used by sharing communities include: 123 or 12345 L0o5c7kXeZr8.2.rar
Once extracted, look for a README.txt or info.nfo file. These usually contain instructions on what the file is and how to install or use it. Use WinRAR (the native format creator) or 7-Zip
Upload the .rar file to VirusTotal to scan it against dozens of antivirus engines. be extremely cautious
If you found this on a random file-hosting site (like MediaFire or Mega) without a clear context, be extremely cautious, as it could contain malware. 2. Check for Passwords