Book Image

BackTrack 5 Wireless Penetration Testing Beginner's Guide

By : Vivek Ramachandran
Book Image

BackTrack 5 Wireless Penetration Testing Beginner's Guide

By: Vivek Ramachandran

Overview of this book

Wireless has become ubiquitous in today’s world. The mobility and flexibility provided by it makes our lives more comfortable and productive. But this comes at a cost – Wireless technologies are inherently insecure and can be easily broken. BackTrack is a penetration testing and security auditing distribution that comes with a myriad of wireless networking tools used to simulate network attacks and detect security loopholes. Backtrack 5 Wireless Penetration Testing Beginner’s Guide will take you through the journey of becoming a Wireless hacker. You will learn various wireless testing methodologies taught using live examples, which you will implement throughout this book. The engaging practical sessions very gradually grow in complexity giving you enough time to ramp up before you get to advanced wireless attacks.This book will take you through the basic concepts in Wireless and creating a lab environment for your experiments to the business of different lab sessions in wireless security basics, slowly turn on the heat and move to more complicated scenarios, and finally end your journey by conducting bleeding edge wireless attacks in your lab.There are many interesting and new things that you will learn in this book – War Driving, WLAN packet sniffing, Network Scanning, Circumventing hidden SSIDs and MAC filters, bypassing Shared Authentication, Cracking WEP and WPA/WPA2 encryption, Access Point MAC spoofing, Rogue Devices, Evil Twins, Denial of Service attacks, Viral SSIDs, Honeypot and Hotspot attacks, Caffe Latte WEP Attack, Man-in-the-Middle attacks, Evading Wireless Intrusion Prevention systems and a bunch of other cutting edge wireless attacks.If you were ever curious about what wireless security and hacking was all about, then this book will get you started by providing you with the knowledge and practical know-how to become a wireless hacker.
Table of Contents (18 chapters)
BackTrack 5 Wireless Penetration Testing
About the Author
About the Reviewer

Time for action – AP-less WPA cracking

  1. We will setup a WPA-PSK Honeypot with the ESSID Wireless Lab. The -z 2 option creates a WPA-PSK access point which uses TKIP:

  2. Let's also start airodump-ng to capture packets from this network:

  3. Now when our roaming client connects to this access point, it starts the handshake but fails to complete it after Message 2 as discussed previously:

  4. But airodump-ng reports that the handshake has been captured:

  5. We run the airodump-ng capture file through aircrack-ng with the same dictionary file as before, eventually the passphrase is cracked as shown next:

What just happened?

We were able to crack the WPA key with just the client. This was possible because even with just the first two packets, we have all the information required to launch a dictionary attack on the handshake.

Have a go hero – AP-less WPA cracking

We would recommend setting different WEP keys on the client and trying this exercise a couple of times to gain confidence. You may notice many times that...