Pocket ESP32 Security Toolkits in a Nutshell
An ESP32 security toolkit is a compact, programmable device based on Espressif’s ESP32 microcontroller that combines wireless connectivity, USB or network interfaces, and custom firmware to perform controlled penetration tests, network diagnostics, and cybersecurity education in portable, lab-friendly form. EvilDuck S3 and Evil-M5Project are two open-source ESP32 cybersecurity projects that shrink powerful capabilities into pocket pentesting tools for students, hobbyists, and professional testers. EvilDuck S3 turns an ESP32-S3 board into a USB rubber ducky-style platform focused on HID-based payloads over USB. Evil-M5Project transforms the M5Stack Cardputer and related devices into a broad, menu-driven WiFi and network security lab with 87+ features. Both aim to make advanced cybersecurity projects more accessible, but they differ sharply in form factor, feature depth, and where they fit in a security workflow.
EvilDuck S3: ESP32-S3 as a Smart USB Rubber Ducky
EvilDuck S3 is a single-purpose, high-control ESP32 security toolkit that reimagines the classic USB rubber ducky concept using the ESP32-S3. Earlier EvilDuck versions combined an ATmega32U4 for USB HID with an ESP8266 for WiFi, but the latest design consolidates everything into the ESP32-S3, which handles both native USB HID and WiFi on one chip. This leaves room on the custom PCB for a MicroSD card slot, a WS2812 RGB “eye” LED, and power regulation. The result is a tiny board that plugs into a USB port and behaves like a keyboard, executing stored scripts for authorized security testing. Compared with broader cybersecurity projects, EvilDuck S3 is narrow but focused, ideal for repeatable payload-driven tests, teaching HID attack concepts, and experimenting with automated keyboard-based workflows from a truly pocket-sized device.
Evil-M5Project: A Full Pocket Cybersecurity Lab on ESP32
Evil-M5Project turns the M5Stack Cardputer and other M5Stack ESP32 devices into a comprehensive, menu-based cybersecurity education platform. According to the creator’s Hackster project page, “Evil-M5Project transforms the M5Stack Cardputer into the most comprehensive pocket-sized cybersecurity education toolkit ever built on an ESP32,” condensing 87+ features and 38,000+ lines of firmware into a single device. It supports at least 10 M5Stack boards and offers 17 slave firmware variants for distributed operations. Its feature sets span WiFi security assessment (scanning, Karma attacks, Evil Twin, deauth, beacon spam, raw packet sniffing), network security testing (DHCP and DNS attacks, Responder-style NTLMv2 capture, WPAD abuse, rogue DHCP), WPA handshake collection and on-device cracking, and Bluetooth/RF threat detection. This self-contained ESP32 security toolkit is designed for education and authorized lab use, helping learners study real-world attacks and their defenses without relying on bulky external equipment.
Form Factor, Capabilities, and Learning Curve Compared
Although both platforms count as pocket pentesting tools, they target different use cases. EvilDuck S3 is a minimalist USB stick-style board built around an ESP32-S3 with HID over USB, WiFi, MicroSD storage, and a single RGB LED. It excels as a small, scriptable USB rubber ducky substitute for payload-based demos, requiring some comfort with flashing firmware and editing scripts on an SD card. Evil-M5Project, by contrast, uses ready-made M5Stack hardware with screen, buttons, battery, and enclosure, delivering a full user interface and 74 wiki documentation pages for guidance. Its learning curve is gentler for students because most interactions happen through menus rather than custom code. In capability terms, EvilDuck S3 is focused but narrow, while Evil-M5Project is wide-ranging, covering WiFi, wired network behavior, WPA auditing, and Bluetooth/RF analysis from one ESP32 security toolkit firmware.
Putting Them to Work in Security Testing Workflows
In practical penetration testing and security research workflows, EvilDuck S3 and Evil-M5Project complement each other. EvilDuck S3 fits best into stages where HID-based payloads matter: demonstrating keystroke injection risks, automating command execution on lab workstations, or prototyping USB rubber ducky scenarios. Its open-source design around ESP32-S3 makes it appealing for builders who want to tweak hardware or firmware for custom payload delivery. Evil-M5Project is better suited for broader assessments: surveying wireless environments, running Evil Twin and deauth tests in controlled labs, exploring DHCP and DNS misconfigurations, collecting WPA handshakes, and experimenting with on-device NTLMv2 and WPA2 password cracking. Since it is also open-source and documented, it works well as a classroom or workshop tool. Together, they show how small ESP32 devices can move from hobby electronics into serious, portable cybersecurity projects when used responsibly and with proper authorization.
