Attackers use crafted archives to place malicious files in sensitive locations like the Windows Startup folder , which then execute automatically upon your next login.
If you must see what's inside, use a secure sandbox environment or open it with a tool that doesn't execute scripts, but be aware that even previewing a file can be risky with unpatched versions. New WinRAR archive (2).rar
Avoid double-clicking the file or using the "Extract" options until you have verified its origin. Attackers use crafted archives to place malicious files