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BackTrack 5 Wireless Penetration Testing Beginner's Guide

You're reading from  BackTrack 5 Wireless Penetration Testing Beginner's Guide

Product type Book
Published in Sep 2011
Publisher Packt
ISBN-13 9781849515580
Pages 220 pages
Edition 1st Edition
Languages
Concepts
Author (1):
Vivek Ramachandran Vivek Ramachandran
Profile icon Vivek Ramachandran
LinkedIn
Vivek Ramachandran has been working on Wi-Fi security since 2003. He discovered the Caffe Latte attack and also broke WEP Cloaking, a WEP protection schema, publicly in 2007 at DEF CON. In 2011, he was the first to demonstrate how malware could use Wi-Fi to create backdoors, worms, and even botnets. Earlier, Vivek was one of the programmers of the 802.1x protocol and Port Security in Cisco's 6500 Catalyst series of switches, and he was also one of the winners of the Microsoft Security Shootout contest held in India among a reported 65,000 participants. He is best known in the hacker community as the founder of SecurityTube.net, where he routinely posts videos on Wi-Fi security, assembly language, exploitation techniques, and so on. SecurityTube.net receives over 100,000 unique visitors a month. Vivek's work on wireless security has been quoted in BBC Online, InfoWorld, MacWorld, The Register, IT World Canada, and so on. This year, he will speak or train at a number of security conferences, including Blackhat, DEF CON, Hacktivity, 44con, HITB-ML, BruCON Derbycon, Hashdays, SecurityZone, and SecurityByte.
See other products by Vivek Ramachandran

Table of Contents (18) Chapters

BackTrack 5 Wireless Penetration Testing
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
1. Wireless Lab Setup 2. WLAN and Its Inherent Insecurities 3. Bypassing WLAN Authentication 4. WLAN Encryption Flaws 5. Attacks on the WLANInfrastructure 6. Attacking the Client 7. Advanced WLAN Attacks 8. Attacking WPA-Enterprise and RADIUS 9. WLAN Penetration Testing Methodology Conclusion and Road Ahead Pop Quiz Answers Index

Time for action – speeding up the cracking process

  1. We can pre-calculate the PMK for a given SSID and wordlist using the genpmk tool with the command genpmk –f /pentest/passwords/wordlists/darkc0de.lst –d PMK-Wireless-Lab –s "Wireless Lab" as shown in the following screenshot. This creates the file PMK-Wireless-Lab that contains the pre-generated PMK:

  2. We now create a WPA-PSK network with the passphrase sky sign (present in the dictionary we used) and capture a WPA-handshake for that network. We now use Cowpatty to crack the WPA passphrase as shown in the following screenshot:

  3. It takes approximately 7.18 seconds for Cowpatty to crack the key, using the pre-calculated PMKs as shown in the screenshot:

  4. 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 pre-calculation:

  5. In order to use these PMKs with aircrack-ng, we need to use a tool called airolib-ng. We will give it the options airolib-ng PMK-Aircrack...

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Authors (1)

Profile icon Vivek Ramachandran
LinkedIn
Vivek Ramachandran has been working on Wi-Fi security since 2003. He discovered the Caffe Latte attack and also broke WEP Cloaking, a WEP protection schema, publicly in 2007 at DEF CON. In 2011, he was the first to demonstrate how malware could use Wi-Fi to create backdoors, worms, and even botnets. Earlier, Vivek was one of the programmers of the 802.1x protocol and Port Security in Cisco's 6500 Catalyst series of switches, and he was also one of the winners of the Microsoft Security Shootout contest held in India among a reported 65,000 participants. He is best known in the hacker community as the founder of SecurityTube.net, where he routinely posts videos on Wi-Fi security, assembly language, exploitation techniques, and so on. SecurityTube.net receives over 100,000 unique visitors a month. Vivek's work on wireless security has been quoted in BBC Online, InfoWorld, MacWorld, The Register, IT World Canada, and so on. This year, he will speak or train at a number of security conferences, including Blackhat, DEF CON, Hacktivity, 44con, HITB-ML, BruCON Derbycon, Hashdays, SecurityZone, and SecurityByte.
Read more
See other products by Vivek Ramachandran

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