INTERCEPT

Signal Intelligence Platform

A sleek, modern web-based front-end for signal intelligence tools.
Unified interface for pager decoding, 433MHz sensors, ADS-B aircraft tracking, satellite monitoring, WiFi reconnaissance, and Bluetooth scanning.

Screenshot

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What is INTERCEPT?

INTERCEPT is a web-based front-end that provides a unified, modern interface for signal intelligence tools:

• rtl_fm + multimon-ng - For decoding POCSAG and FLEX pager signals
• rtl_433 - For decoding 433MHz ISM band devices (weather stations, sensors, etc.)
• dump1090 / rtl_adsb - For ADS-B aircraft tracking with real-time map visualization
• Satellite tracking - Pass prediction and Iridium burst detection using TLE data
• aircrack-ng - For WiFi reconnaissance and network analysis
• hcitool / bluetoothctl - For Bluetooth device scanning and tracking

Instead of running command-line tools manually, INTERCEPT handles the process management, output parsing, and presents decoded data in a clean, real-time web interface.

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Features

📟 Pager Decoding

• Real-time decoding of POCSAG (512/1200/2400) and FLEX protocols
• Customizable frequency presets stored in browser
• Auto-restart on frequency change while decoding

📡 433MHz Sensor Decoding

• 200+ device protocols supported via rtl_433
• Weather stations - temperature, humidity, wind, rain
• TPMS - Tire pressure monitoring sensors
• Doorbells, remotes, and IoT devices
• Smart meters and utility monitors

✈️ ADS-B Aircraft Tracking

• Real-time aircraft tracking via dump1090 or rtl_adsb
• Interactive Leaflet map with OpenStreetMap tiles
• Dark-themed map matching application aesthetic
• Aircraft details - callsign, altitude, speed, heading, squawk
• Click aircraft markers for detailed popup information
• Auto-fit view to show all tracked aircraft
• Emergency aircraft highlighting in red

🛰️ Satellite Tracking

• Pass prediction for satellites using TLE data
• Add satellites via manual TLE entry or Celestrak import
• Celestrak integration - fetch satellites by category (Amateur, Weather, ISS, Starlink, etc.)
• Iridium burst detection monitoring
• Next pass countdown with elevation and duration
• Multiple satellite tracking simultaneously

📶 WiFi Reconnaissance

• Monitor mode management via airmon-ng
• Network scanning with airodump-ng
• Channel hopping or fixed channel monitoring
• Deauthentication attacks for authorized testing
• Handshake capture with real-time status and auto-detection
• Channel utilization visualization (2.4GHz and 5GHz)
• Security overview chart (WPA3/WPA2/WEP/Open)
• Real-time radar display of nearby networks
• Client vendor lookup via OUI database
• Proximity alerts - watch list for specific MAC addresses

🚁 Drone Detection

• Automatic detection of drones via SSID patterns and manufacturer OUI
• Supported brands: DJI, Parrot, Autel, Skydio, Holy Stone, and many more
• Distance estimation from signal strength
• Visual alerts with triple audio notification
• Clickable drone counter - view all detected drones with details

⚠️ Rogue AP Detection

• Automatic detection of same SSID on multiple BSSIDs
• Clickable counter - view which SSIDs triggered alerts
• Detailed popup showing all BSSIDs, channels, and signal strength

📈 Signal History Graph

• Real-time line chart showing signal strength over time
• Track any device - click the 📈 button on any network
• Visual movement detection - see devices approaching or departing

🕸️ Network Topology Graph

• Visual map of all access points and connected clients
• Color-coded nodes - cyan for APs, green for clients, orange for drones
• Auto-updating as new devices are discovered

💡 Channel Recommendation

• Automatic analysis of channel congestion
• Recommends optimal channels for both 2.4GHz and 5GHz
• Considers channel overlap for accurate 2.4GHz recommendations

👁️ Hidden SSID Revealer

• Captures hidden SSIDs from probe requests
• Displays revealed networks with BSSID mapping
• Desktop notifications when new hidden SSIDs are revealed

🔗 Device Correlation

• Matches WiFi and Bluetooth devices with same manufacturer
• OUI-based correlation to identify multi-radio devices
• Useful for tracking devices across protocols

📡 Client Probe Analysis

• Track client probe requests - see what networks devices are looking for
• Privacy leak detection - highlights sensitive network names (home, office, hotel, airport)
• Vendor identification - shows device manufacturer
• Sorted by exposure - most revealing clients shown first
• Unique SSID counter - total unique networks being probed

🔵 Bluetooth Scanning

• BLE and Classic Bluetooth device scanning
• Multiple scan modes - hcitool, bluetoothctl
• Tracker detection - AirTag, Tile, Samsung SmartTag, Chipolo
• Device classification - phones, audio, wearables, computers
• Manufacturer lookup via OUI database
• Proximity radar visualization
• Device type breakdown chart

🔔 Browser Notifications

• Desktop notifications for critical events (even when tab is in background)
• Alerts for: Drone detection, Rogue APs, Handshake capture, Hidden SSID reveals
• Permission requested on first interaction

❓ Help System

• Built-in help page accessible via ? button in header
• Icon legend for all stats bar icons
• Mode-by-mode guides with tips and instructions
• Keyboard shortcut: Press Escape to close

🎨 User Interface

• Collapsible sections - click any header to collapse/expand
• Icon-based stats bar with tooltips
• Tabbed mode selector with icons (grouped by SDR/RF and Wireless)
• Compact, modern design with consistent styling
• Dark/Light theme toggle - click moon/sun icon in header, preference saved
• Keyboard shortcuts - F1 or ? to open help

⌨️ Keyboard Shortcuts

Key	Action
F1	Open help
?	Open help (when not typing)
Escape	Close help/modals

General

• Web-based interface - no desktop app needed
• Live message streaming via Server-Sent Events (SSE)
• Audio alerts with mute toggle
• Message export to CSV/JSON
• Signal activity meter and waterfall display
• Message logging to file with timestamps
• RTL-SDR device detection and selection
• Configurable gain and PPM correction
• Device intelligence dashboard with tracking
• Disclaimer acceptance on first use
• Auto-stop when switching between modes

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Stats Bar Icons

Icon	Meaning
📟	POCSAG messages decoded
📠	FLEX messages decoded
📨	Total messages received
🌡️	Unique sensors detected
📊	Device types found
✈️	Aircraft being tracked
🛰️	Satellites being monitored
📡	WiFi Access Points
👤	Connected WiFi clients
🤝	Captured handshakes
🚁	Detected drones (click for details)
⚠️	Rogue APs (click for details)
🔵	Bluetooth devices
📍	BLE beacons detected

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Requirements

Hardware

• RTL-SDR compatible dongle (RTL2832U based)
• WiFi adapter capable of monitor mode (for WiFi features)
• Bluetooth adapter (for Bluetooth features)

Software

• Python 3.7+
• Flask
• requests (for Celestrak API)
• rtl-sdr tools (rtl_fm)
• multimon-ng (for pager decoding)
• rtl_433 (for 433MHz sensor decoding)
• dump1090 or rtl_adsb (for ADS-B aircraft tracking)
• aircrack-ng (for WiFi reconnaissance)
• BlueZ tools - hcitool, bluetoothctl (for Bluetooth)

Installation

1. Install RTL-SDR tools

macOS (Homebrew):

brew install rtl-sdr

Ubuntu/Debian:

sudo apt-get install rtl-sdr

Arch Linux:

sudo pacman -S rtl-sdr

2. Install multimon-ng

macOS (Homebrew):

brew install multimon-ng

Ubuntu/Debian:

sudo apt-get install multimon-ng

From source:

git clone https://github.com/EliasOenal/multimon-ng.git
cd multimon-ng
mkdir build && cd build
cmake ..
make
sudo make install

3. Install rtl_433 (optional, for 433MHz sensors)

macOS (Homebrew):

brew install rtl_433

Ubuntu/Debian:

sudo apt-get install rtl-433

From source:

git clone https://github.com/merbanan/rtl_433.git
cd rtl_433
mkdir build && cd build
cmake ..
make
sudo make install

4. Install aircrack-ng (optional, for WiFi)

macOS (Homebrew):

brew install aircrack-ng

Ubuntu/Debian:

sudo apt-get install aircrack-ng

5. Install dump1090 (optional, for ADS-B aircraft tracking)

macOS (Homebrew):

brew install dump1090-mutability

Ubuntu/Debian:

sudo apt-get install dump1090-mutability

From source:

git clone https://github.com/flightaware/dump1090.git
cd dump1090
make
sudo cp dump1090 /usr/local/bin/

6. Install Bluetooth tools (optional)

Ubuntu/Debian:

sudo apt-get install bluez bluetooth

macOS: Bluetooth tools are built-in, though with limited functionality compared to Linux.

7. Install Python dependencies

pip install -r requirements.txt

8. Clone and run

git clone https://github.com/smittix/intercept.git
cd intercept
sudo python3 intercept.py

Open your browser to http://localhost:5050

Note: Running as root/sudo is recommended for full functionality (monitor mode, raw sockets, etc.)

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Usage

Pager Mode

1. Select Device - Choose your RTL-SDR device from the dropdown
2. Set Frequency - Enter a frequency in MHz or use a preset
3. Choose Protocols - Select which protocols to decode (POCSAG/FLEX)
4. Adjust Settings - Set gain, squelch, and PPM correction as needed
5. Start Decoding - Click the green "Start Decoding" button

WiFi Mode

1. Select Interface - Choose a WiFi adapter capable of monitor mode
2. Enable Monitor Mode - Click "Enable Monitor" (uncheck "Kill processes" to preserve other connections)
3. Start Scanning - Click "Start Scanning" to begin
4. View Networks - Networks appear in the output panel with signal strength
5. Track Devices - Click 📈 on any network to track its signal over time
6. Capture Handshakes - Click "Capture" on a network to start handshake capture

Bluetooth Mode

1. Select Interface - Choose your Bluetooth adapter
2. Choose Mode - Select scan mode (hcitool, bluetoothctl)
3. Start Scanning - Click "Start Scanning"
4. View Devices - Devices appear with name, address, and classification

Aircraft Mode

1. Check Tools - Ensure dump1090 or rtl_adsb is installed
2. Start Tracking - Click "Start Tracking" to begin ADS-B reception
3. View Map - Aircraft appear on the interactive Leaflet map
4. Click Aircraft - Click markers for detailed information (altitude, speed, heading)
5. Toggle Labels - Use checkboxes to show/hide callsigns and flight levels

Satellite Mode

1. Add Satellites - Click "Add Satellite" to enter TLE data manually, or use "Celestrak" to fetch by category
2. Select Category - Choose from Amateur, Weather, ISS, Starlink, GPS, etc.
3. View Passes - Next pass predictions shown with elevation and duration
4. Track Multiple - Add multiple satellites to track simultaneously
5. Iridium Bursts - Monitor for Iridium satellite burst transmissions

Frequency Presets

• Click a preset button to quickly set a frequency
• Add custom presets using the input field and "Add" button
• Right-click a preset to remove it
• Click "Reset to Defaults" to restore default frequencies

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API Endpoints

Pager & Sensor

Endpoint	Method	Description
/	GET	Main web interface
/devices	GET	List RTL-SDR devices
/start	POST	Start pager decoding
/stop	POST	Stop pager decoding
/start_sensor	POST	Start 433MHz sensor listening
/stop_sensor	POST	Stop 433MHz sensor listening
/status	GET	Get decoder status
/stream	GET	SSE stream for pager messages
/stream_sensor	GET	SSE stream for sensor data

WiFi

Endpoint	Method	Description
/wifi/interfaces	GET	List WiFi interfaces and tools
/wifi/monitor	POST	Enable/disable monitor mode
/wifi/scan/start	POST	Start WiFi scanning
/wifi/scan/stop	POST	Stop WiFi scanning
/wifi/deauth	POST	Send deauthentication packets
/wifi/handshake/capture	POST	Start handshake capture
/wifi/handshake/status	POST	Check handshake capture status
/wifi/networks	GET	Get discovered networks
/wifi/stream	GET	SSE stream for WiFi events

Bluetooth

Endpoint	Method	Description
/bt/interfaces	GET	List Bluetooth interfaces and tools
/bt/scan/start	POST	Start Bluetooth scanning
/bt/scan/stop	POST	Stop Bluetooth scanning
/bt/enum	POST	Enumerate device services
/bt/devices	GET	Get discovered devices
/bt/stream	GET	SSE stream for Bluetooth events

Aircraft (ADS-B)

Endpoint	Method	Description
/adsb/start	POST	Start ADS-B tracking
/adsb/stop	POST	Stop ADS-B tracking
/adsb/aircraft	GET	Get tracked aircraft
/adsb/stream	GET	SSE stream for aircraft data
/adsb/tools	GET	Check ADS-B tool availability

Satellite

Endpoint	Method	Description
/satellite/add	POST	Add satellite with TLE data
/satellite/remove	POST	Remove satellite from tracking
/satellite/list	GET	Get tracked satellites
/satellite/passes	GET	Get pass predictions
/satellite/celestrak/<category>	GET	Fetch satellites from Celestrak

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Troubleshooting

No devices found

• Ensure your RTL-SDR is plugged in
• Check rtl_test works from command line
• On Linux, you may need to blacklist the DVB-T driver

No messages appearing

• Verify the frequency is correct for your area
• Adjust the gain (try 30-40 dB)
• Check that pager services are active in your area
• Ensure antenna is connected

WiFi monitor mode fails

• Ensure you're running as root/sudo
• Check your adapter supports monitor mode: iw list | grep monitor
• Try: airmon-ng check kill to stop interfering processes

Device busy error

• Click "Kill All Processes" to stop any stale processes
• Unplug and replug the RTL-SDR device

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License

MIT License - see LICENSE for details.

Author

Created by smittix - GitHub

Acknowledgments

• rtl-sdr - RTL-SDR drivers
• multimon-ng - Multi-protocol pager decoder
• rtl_433 - 433MHz sensor decoder
• dump1090 - ADS-B decoder for aircraft tracking
• aircrack-ng - WiFi security auditing tools
• BlueZ - Official Linux Bluetooth protocol stack
• Leaflet.js - Interactive maps for aircraft tracking
• OpenStreetMap - Map tile data
• Celestrak - Satellite TLE data
• Inspired by the SpaceX mission control aesthetic

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⚠️ Disclaimer

This software is for educational purposes only and intended for use by cybersecurity professionals in controlled environments.

By using INTERCEPT, you acknowledge that:

• You will only use this tool with proper authorization
• Intercepting communications without consent may be illegal in your jurisdiction
• WiFi deauthentication and Bluetooth attacks should only be performed on networks/devices you own or have explicit permission to test
• You are solely responsible for ensuring compliance with all applicable laws and regulations
• The developers assume no liability for misuse of this software

A disclaimer must be accepted when first launching the application.