There is no such thing as a bot or software that can generate Robux. The only way to get Robux is through the official Roblox website, gift cards, or by creating and selling items/games within the platform.

It looks like you've come across a file that is almost certainly a or malware .

Many .rar files labeled as "Robux Bots" contain scripts designed to scrape your browser cookies or saved passwords. Once they have your "ROBLOSECURITY" cookie, they can log into your account without needing your password or 2FA.