In this talk we will learn a bit about how USB devices can do evil things to your system and introduce a new tool, called USBGuard, that helps you to defend against USB-based attacks. The USBGuard software framework helps to protect your computer against rogue USB devices (a.k.a. BadUSB) by implementing a firewall-like system for whitelisting and blacklisting the devices based on their attributes. Finally, some of the advanced and planned features like USB traffic monitoring or network bound USB disk encryption will be presented.