Today, I am excited to introduce you to FEBERIS, an expansion 3-in-1 development board for the Flipper Zero. This custom board utilizes external Wi-Fi, NRF24, and CC1101 modules, enhancing the capabilities of your Flipper Zero device.
You might have seen FEBERIS in action on social media, but I had the unique opportunity to chat with Krystian, one of its creators, over Instagram. After our conversation, we decided that I could test it myself.
In this blog, I will share my insights, experiences and future of this new gadget, exploring its features and potential applications.
What is FEBERIS?
Introducing FEBERIS, a plug-and-play development board that works right out of the box. Designed for ease of use, this innovative board is perfect for both beginners and advanced users of the Flipper Zero. All these components have custom 3D printed cases, that are well designed and small with an LED indicator to show which module is currently in use.
FEBERIS is a comprehensive 3-in-1 kit that includes:
- Wi-Fi (ESP32) – it is a main board with the ability to connect an external antenna with JTAG interface,
- C1101 – which increases the SubGHz range of the Flipper Zero beyond 100 meters,
- NRF24 – which allows for MouseJack vulnerability testing and Bluetooth and Wi-Fi jamming.
Marauder software is already installed on the main Wi-Fi board. If you want to re-flash the board you have to use these binaries.
What do I need to run FEBERIS?
All you need is a Flipper Zero running unofficial firmware such as Xtreme, Unleashed or Momentum. Everything else, including antennas, is part of the box.
How it works
The FEBERIS consists of three boards that integrate with Flipper Zero. The main Wi-Fi board plugs directly into the Flipper Zero, fitting perfectly whether your device has a silicon case or not.
On top of the board, you’ll find pins that allow you to plug in either the NRF24 or CC1101 module. While you can’t have both modules plugged in simultaneously, this design is convenient for maintaining a small and portable setup. Simply unplug the modules you don’t need to keep your device compact.
The back side of the FEBERIS features a switch that enables either the main Wi-Fi board or an additional board like the NRF24 or CC1101. LED lights on the main board indicate which module is currently active, providing clear and immediate feedback.
Additionally, the JTAG case is located on the left side of the main board, protected by a small case.
Use cases
There are various red team use cases for these modules, making them useful tools for cybersecurity professionals. Whether you’re conducting penetration testing, vulnerability assessments, or security research, these modules offer a wide range of functionalities to enhance your toolkit such as:
- Wi-Fi module – scan access points, deauthenticate devices, evil portal, Bluetooth Low Energy (BLE) spam, wardrive, beacon spam, and others.
- CC1101 – capture, analyze and transmit radio frequencies with over 100 meters distance withing 300-348, 387-464 and 779-928 MHz frequency bands to be able to for example emulate garage doors, doorbells, gates, jamming, restaurant pagers, smart home remotes, thermostats, weather stations, and others.
- NRF24 – Mouse Jacking (Perform mouse jacking attacks to test the security of wireless mice and keyboards) and jamming of Bluetooth and Wi-Fi signal.
Where to buy?
You can order it online from Sapsan Cybersec & Military store for around $62 USD with world-wide shipping.
FEBERIS future
FEBERIS seems to be a success project, and we can look forward to its next generation – FEBERIS Pro. Krystian, founder of the project, has already shared with me that they have created a prototype version that will include ESP32, GPS, NRF24, and two CC1101 modules at 433MHz and 900MHz frequencies. You can see the prototype in the figure below.
Although the release date is still not set, it is possible to join a waiting list at this address.
FEBERIS alternatives
While it’s possible to use each module separately, this approach is cheaper but requires some soldering skills and might not look very portable or as appealing. You can pin these modules using jump cables, as shown in the Figure 5. below, where I also designed a custom 3D case for some of them. However, this setup is neither compact nor small.
FEBERIS, on the other hand, offers a sleek and integrated solution that eliminates the need for soldering and provides a more aesthetically pleasing and portable option. This all-in-one development board simplifies the process and enhances the overall user experience, making it a superior choice for those looking to maximize their Flipper Zero’s capabilities.
Conclusion
From my point of view, FEBERIS is the multi-board that stands out, primarily due to its compact size and the convenient option to switch between the NRF24 and CC1101 modules. Although I already own each of these boards individually, FEBERIS offers a much easier, more stable, and aesthetically attractive solution. This all-in-one development board simplifies the process and enhances the overall user experience, making it a convenient toolkit.