📡 NullSec SDR
March 7, 2026 · View on GitHub
📡 NullSec SDR
Software-Defined Radio Security Toolkit
RF signal analysis, capture, replay, and protocol decoding for security research
🎯 Overview
NullSec SDR is a comprehensive software-defined radio toolkit for security researchers. It wraps complex SDR workflows into streamlined commands for signal reconnaissance, protocol analysis, and vulnerability assessment across the RF spectrum.
⚡ Features
| Feature | Description |
|---|---|
| Spectrum Scanner | Wideband scanning with automatic signal detection (1 MHz – 6 GHz) |
| Signal Capture | IQ recording with metadata tagging and GPS correlation |
| Protocol Decoder | Automatic identification of 30+ RF protocols |
| Replay Engine | Signal replay with timing and frequency adjustment |
| Waterfall Viewer | Real-time spectral visualization in terminal |
| Frequency Database | Known frequency lookup for your region |
📻 Supported Hardware
| Device | Frequency Range | Status |
|---|---|---|
| HackRF One | 1 MHz – 6 GHz | ✅ Full |
| RTL-SDR v3/v4 | 24 MHz – 1.766 GHz | ✅ Full |
| YARD Stick One | Sub-1 GHz | ✅ Full |
| LimeSDR | 100 kHz – 3.8 GHz | ✅ Full |
| BladeRF | 300 MHz – 3.8 GHz | ⚠️ Beta |
| Pluto SDR | 325 MHz – 3.8 GHz | ⚠️ Beta |
🚀 Quick Start
# Install
pip install nullsec-sdr
# Scan the spectrum
nullsec-sdr scan --range 315M-915M --threshold -40
# Capture a signal
nullsec-sdr capture --freq 433.92M --rate 2M --duration 10 -o capture.iq
# Decode protocol
nullsec-sdr decode capture.iq --protocol auto
# Replay signal
nullsec-sdr replay capture.iq --freq 433.92M --gain 40
🔬 Supported Protocols
| Protocol | Frequency | Use Case |
|---|---|---|
| ASK/OOK | 315/433 MHz | Garage doors, sensors |
| FSK | Various | Weather stations, TPMS |
| LoRa | 868/915 MHz | IoT networks |
| Z-Wave | 868/908 MHz | Home automation |
| Zigbee | 2.4 GHz | Smart home |
| POCSAG | 150-170 MHz | Paging systems |
| ADS-B | 1090 MHz | Aircraft tracking |
| ACARS | 131.55 MHz | Aviation data |
| P25 | Various | Public safety radio |
| DMR | Various | Digital mobile radio |
🔗 Related Projects
| Project | Description |
|---|---|
| nullsec-rfid | RFID/NFC cloning & analysis |
| nullsec-glitch | Voltage glitching attacks |
| nullsec-keyfob | Automotive key fob analysis |
| nullsec-flipper-suite | Flipper Zero payload suite (430+ files) |
| nullsec-linux | Security Linux distro (140+ tools) |
⚠️ Legal
This tool is for authorized security testing and educational purposes only. Transmitting on frequencies you are not licensed for is illegal. Always check local regulations.
📜 License
MIT License — @bad-antics
Part of the NullSec Hardware Security Suite