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BackTrack 5 Wireless Penetration Testing: Beginner's Guide is aimed at helping the reader understand the insecurities associated with wireless networks, and how to conduct penetration tests to find and plug them. This is an essential read for those who would like to conduct security audits on wireless networks and always wanted a step-by-step practical guide for the same. As every wireless attack explained in this book is immediately followed by a practical demo, the learning is very complete.

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 Defcon. In 2011, Vivek was the first to demonstrate how malware could use Wi-Fi to create backdoors, worms, and even botnets.

Earlier, he was one of the programmers of the 802.1x protocol and Port Security in Cisco's 6500 Catalyst series of switches and 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 http://www.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 is speaking or training at a number of security conferences, including BlackHat, Defcon, Hacktivity, 44con, HITB-ML, Brucon, Derbycon, HashDays, SecurityZone, SecurityByte, and so on.

Preface1
Chapter 1: Wireless Lab Setup 7
Hardware requirements 8
Software requirements 8
Installing BackTrack 8
Time for action – installing BackTrack 9
Setting up the access point 12
Time for action – configuring the access point 12
Setting up the wireless card 15
Time for action – configuring your wireless card 16
Connecting to the access point 17
Time for action – configuring your wireless card 18
Summary 22
Chapter 2: WLAN and Its Inherent Insecurities 23
Revisiting WLAN frames 24
Time for action – creating a monitor mode interface 26
Time for action – sniffing wireless packets 29
Time for action – viewing Management, Control, and Data frames 32
Time for action – sniffing data packets for our network 36
Time for action – packet injection 40
Important note on WLAN sniffing and injection 42
Time for action – experimenting with your Alfa card 42
Role of regulatory domains in wireless 45
Time for action – experimenting with your Alfa card 45
Summary 49
Chapter 3: Bypassing WLAN Authentication 51
Hidden SSIDs 51
Time for action – uncovering hidden SSIDs 52
Table of Contents
[ ii ]
MAC filters 57
Time for action – beating MAC filters 57
Open Authentication 60
Time for action – bypassing Open Authentication 60
Shared Key Authentication 62
Time for action – bypassing Shared Authentication 63
Summary 71
Chapter 4: WLAN Encryption Flaws 73
WLAN encryption 73
WEP encryption 74
Time for action – cracking WEP 74
WPA/WPA2 82
Time for action – cracking WPA-PSK weak passphrase 85
Speeding up WPA/WPA2 PSK cracking 89
Time for action – speeding up the cracking process 90
Decrypting WEP and WPA packets 94
Time for action – decrypting WEP and WPA packets 94
Connecting to WEP and WPA networks 96
Time for action – connecting to a WEP network 96
Time for action – connecting to a WPA network 97
Summary 99
Chapter 5: Attacks on the WLAN Infrastructure 101
Default accounts and credentials on the access point 101
Time for action – cracking default accounts on the access points 102
Denial of service attacks 104
Time for action – De-Authentication DoS attack 104
Evil twin and access point MAC spoofing 107
Time for action – evil twin with MAC spoofing 108
Rogue access point 112
Time for action – Rogue access point 112
Summary 116
Chapter 6: Attacking the Client 117
Honeypot and Mis-Association attacks 118
Time for action – orchestrating a Mis-Association attack 118
Caffe Latte attack 124
Time for action – conducting the Caffe Latte attack 124
De-Authentication and Dis-Association attacks 129
Time for action – De-Authenticating the client 129
Hirte attack 133
Time for action – cracking WEP with the Hirte attack 133
Table of Contents
[ iii ]
AP-less WPA-Personal cracking 135
Time for action – AP-less WPA cracking 137
Summary 140
Chapter 7: Advanced WLAN Attacks 141
Man-in-the-Middle attack 141
Time for action – Man-in-the-Middle attack 142
Wireless Eavesdropping using MITM 147
Time for action – wireless eavesdropping 147
Session Hijacking over wireless 152
Time for action – session hijacking over wireless 153
Finding security configurations on the client 156
Time for action – enumerating wireless security profiles 157
Summary 161
Chapter 8: Attacking WPA-Enterprise and RADIUS 163
Setting up FreeRadius-WPE 163
Time for action – setting up the AP with FreeRadius-WPE 164
Attacking PEAP 168
Time for action – cracking PEAP 168
Attacking EAP-TTLS 173
Time for action – cracking EAP-TTLS 174
Security best practices for Enterprises 176
Summary 177
Chapter 9: WLAN Penetration Testing Methodology 179
Wireless penetration testing 179
Planning 180
Discovery 180
Time for action – discovering wireless devices 181
Attack 183
Finding rogue access points 183
Finding unauthorized clients 185
Cracking the encryption 186
Compromising clients 189
Reporting 191
Summary 192
Appendix A: Conclusion and Road Ahead 193
Wrapping up 193
Building an advanced Wi-Fi lab 194
Staying up-to-date 196
Conclusion 197
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