Flipper Zero + BadUSB (Ducky Script): A Primer

Ronald Farrer
3 min readNov 29, 2023
Photo by S. Tsuchiya on Unsplash

Flipper Zero, an open-source multi-tool, has carved a niche for itself among hackers, cybersecurity researchers, and tech enthusiasts due to its versatile functionalities. One of its intriguing features is the ability to emulate USB devices, known as BadUSB.

BadUSB is an attack form where a USB device is altered to act like a keyboard or other Human Interface Devices (HID). This allows it to send commands or data that ordinarily wouldn’t be accepted from an external source.

It’s essential to remember that this information is for educational purposes only. Misuse of this information for malicious activity or unauthorized access is both illegal and unethical. The aim of this tutorial is to encourage responsible use, ethical hacking, and cybersecurity research.

Step 1: Get Acquainted with the Flipper Zero

Before you begin writing a Ducky Script for BadUSB, it’s imperative to get acquainted with Flipper Zero and its various features. You can find detailed information in the Flipper Zero user manual and on the official website.

Step 2: Understand the Basic of BadUSB

BadUSB operates on the fact that many modern computers inherently trust USB devices. A BadUSB attack capitalizes on this trust to impersonate HID devices like keyboards and mice. Once plugged into a computer, a BadUSB device can send keystrokes or mouse actions, potentially leading to various types of attacks.

Step 3: Setting Up Your Flipper Zero Development Environment

To write and deploy a script on your Flipper Zero, you need to set up a suitable development environment. Unix-based systems like Linux or macOS are recommended for development, but you can also set it up on Windows.

A text editor or Integrated Development Environment (IDE) is necessary for writing and editing your scripts. Visual Studio Code, Atom, or Sublime Text are some good choices. I prefer (neo)Vim.

Step 4: Write Your Ducky Script

Here comes the crucial part: writing your Ducky Script. Unlike Python, Ducky Script is a simple, user-friendly scripting language designed specifically for Rubber Ducky USB devices. It uses simple syntax to generate keystrokes.