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Kali Linux Wireless Penetration Testing Beginner???s Guide

You're reading from   Kali Linux Wireless Penetration Testing Beginner???s Guide Master wireless testing techniques to survey and attack wireless networks with Kali Linux, including the KRACK attack

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Product type Paperback
Published in Dec 2017
Publisher
ISBN-13 9781788831925
Length 210 pages
Edition 3rd Edition
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Authors (3):
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Vivek Ramachandran Vivek Ramachandran
Author Profile Icon Vivek Ramachandran
Vivek Ramachandran
Cameron Buchanan Cameron Buchanan
Author Profile Icon Cameron Buchanan
Cameron Buchanan
Daniel W. Dieterle Daniel W. Dieterle
Author Profile Icon Daniel W. Dieterle
Daniel W. Dieterle
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Table of Contents (14) Chapters Close

Preface 1. Wireless Lab Setup FREE CHAPTER 2. WLAN and Its Inherent Insecurities 3. Bypassing WLAN Authentication 4. WLAN Encryption Flaws 5. Attacks on the WLAN Infrastructure 6. Attacking the Client 7. Advanced WLAN Attacks 8. KRACK Attacks 9. Attacking WPA-Enterprise and RADIUS 10. WLAN Penetration Testing Methodology 11. WPS and Probes A. Pop Quiz Answers Index

Time for action – speeding up the cracking process


We can proceed with the following steps:

  1. We can pre-calculate the PMK for a given SSID and wordlist using the genpmk tool with the following command:

    genpmk -f <chosen wordlist> -d PMK-Wireless-Lab -s "Wireless Lab"
    

    This creates the PMK-Wireless-Lab file containing the pregenerated PMK:

  2. We now create a WPA-PSK network with the passphrase abcdefgh (present in the dictionary we used) and capture a WPA-handshake for that network as we did with the previous exercise; alternatively, use the files we used previously. We now use Cowpatty to crack the WPA passphrase, as shown in the following screenshot:

    It takes approximately 7.18 seconds for Cowpatty to crack the key, using the precalculated PMKs.

  3. We now use aircrack-ng with the same dictionary file, and the cracking process takes over 22 minutes. This shows how much we are gaining because of the precalculation.

What just happened?

We looked at various different tools and techniques to speed...

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