Wireless Network Risks and Controls - · PDF fileWireless Network Risks and Controls Offensive...

Wireless NetworkRisks and ControlsOffensive Security Tools, Techniques, and Defenses

22 January 2015 – ISACA Phoenix Chapter – Phoenix, AZ

Presented by:Ruihai FangDan PetroBishop Foxwww.bishopfox.com

Introduction/Background

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GETTING UP TO SPEED

Used to be a PainLots to of heavy things to carry

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Kali VM and USB Adapter

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N O W E A S Y

• Kali Linux VM + TP-LINK - TL-WN722N (USB)

+

Laptops, Netbooks (easier to conceal),and adapters

Asus EEPc

TP-Link AdapterCapable of attaching aYAGI antenna

YAGI Antennas – Directional

Very good for attacking from adistance, like from the comfort ofyour hotel room.

Antenna Connector Cables are Necessary

WiFi Hacking Using Android Phones

StarTech Micro USBOn-the-go Adapter

Alfa 1000mW 1W 802.11b/g USBWiFi Adapter. Uses RTL8187 Chipset.

Samsung Galaxy S3

Wireless Hacking Tools

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ACROSS VARIOUS OS’S

Wireless Tools

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Discovery

• Supported operating systems

• Supported wireless protocols

• Active vs. passive scanning

• Packet capturing and decoding

• Distinguishes between AP, ad hoc, and clientdevices

• Statistics and reporting capabilities

• User interface

• Price

NirSoft Wireless Tools

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W I N D O W S H A C K I N G T O O L S

• NirSoft – WirelessNetView

• NirSoft – WifiInfoView

• NirSoft - Wireless Network Watcher

inSSIDer Wi-Fi Scanner

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W I N D O W S H A C K I N G T O O L S

Aircrack-ng Suite

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L I N U X H A C K I N G T O O L S

Kismet

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L I N U X H A C K I N G T O O L S

Kismac

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M A C O S X H A C K I N G T O O L S

inSSIDer for Mac

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M A C O S X H A C K I N G T O O L S

Wi-Fi Pineapple

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W IRELESS PENETRATION TESTING ROUTER

Features

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• Wireless Jamming (De-auth Attack)• Man-in-the-Middle attack• DNS Spoof on lure client• Web base management• Tether via Mobile Broadband• Battery power and portable

W HAT CAN IT DO?

Specs

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• Atheros AR9331 SoC at 400MHz

• 802.11 b/g/n 150 Mbps wireless

• 2x Ethernet, one PoE (Power-Over-Ethernet)capable

• USB 2.0 for expanded storage, WiFi Interfaceand Mobile Broadband

• Fast Linux Kernel 3.2 based Jasager Firmware

THE HARDWARE

Methodology

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Social Engineering

1. Karma (Rogue AP)

2. DNS Spoof & MITM

3. Phishing

Auto-Association

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PROBLEM TO EXPLOIT

Karma

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• Listen to wireless probes from nearby wirelessdevices

• Impersonate as the requested wireless AP

HOW DOES IT W ORK?

Karma

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ROGUE AP

reddit.com

DNS Spoof

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• Modify DNS records and point to a malicious site• Man-in-the-middle between the victim and

Internet

POISONING YOUR DNS

reddit.com

Malicious site

Phishing

• Clone the officialwebsite (reddit.com)

• Implement key logger

• Deploy malware orbackdoor on theforged website

• Compromise thevictim

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PHISHING ATTACK

DEMO

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1. Disable the “Connect Automatically” setting on allunsecured wireless networks.

2. Use DNS Crypt or Google DNS

3. Don’t connect to any unsecured or unknownwireless network

4. Use a trusted VPN tunnel to encrypt the traffic onpublic network

MitigationThings that you should be doing

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Raspberry Pi

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F R U I T Y W I F I

• Raspberry Pi – cheap alternative (~$35)

• Fruity WiFi – Raspberry Pi version of the WiFi Pineapple

Easy-creds

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AUTOMATING W IFI CLIENT ATTACKS

Dumping Keys

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CLIENT EXPLOITING

Cracking WPA2-PSK with Pyrit

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Using Kismet We’ve Decided on ourTarget Network

Pyrithttps://code.google.com/p/pyrit/

Pyrit allows to create massive databases,pre-computing part of the IEEE 802.11WPA/WPA2-PSK authentication phase ina space-time-tradeoff. Exploiting thecomputational power of Many-Core- andother platforms through ATI-Stream, Nvidia CUDA and OpenCL, it iscurrently by far the most powerful attackagainst one of the world's most usedsecurity-protocols.

During Recon Find What Channel Your Target is on and Capture only on thatChannel to Increase Your Chances of Getting a Valid WPA Handshake

CorpWiFi9 onChannel 6

Passive Monitoring with Kismet

Running Kismet for 12 hours will capturelots of packets and PCAP files can belarge.

DEMO

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Stripping a PCAP File with Pyrit

Randomly Captured WPA2 HandshakeAfter Running Kismet for 12 hours in

my apartment

A Typical Windows 7 Wireless ClientUsing WPA2

WPA 4-Way Handshake

WPA 4-Way Handshake

Decrypting WPA Packet Captures withFound Key in Wireshark

Before and After Decryption inWireshark

Before Applying WPA Key

After Applying WPA Key

Mobile WiFiSecurity Tools

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Popular Mobile WiFi Hacking Tools

WiFi Sniffing on Android in Monitor Modehttp://www.kismetwireless.net/android-pcap/

Password Sniffing & SessionHijacking Using dSploithttp://dsploit.net/

https://code.google.com/p/iphone-wireless/wiki/Stumbler

iphone-wireless

More Discreet Monitoring UsingAlpha 1 802.11b/g

Model NumberAWUS036H. This usesthe RTL8187 WirelessChipset.

Android PCAP Monitor Mode on aGalaxy S3

Arp Spoofing & Detection

88:32:9b:0b:a8:06 isactually the Android

Phone pretending to bethe default gateway at

192.168.1.254

Web Session Hijacking using dSploit

PwnPad

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N E X U S 7 P E N T E S T D E V I C E

Defenses

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A V O I D B E I N G P R O B E D

Defenses

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R E C O M M E N D A T I O N S

• Conduct regular wireless assessments

• Employ strong encryption and authenticationmethods

• Employ wireless IDS/IPS

• Secure wireless clients (laptops, phones, …)

Defenses

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R E C O M M E N D A T I O N S

Use “wireless checks” of network vulnerabilityscanners

Defenses

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R E C O M M E N D A T I O N S

Physically track down rogue access points andmalicious devices

Thank You

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Bishop Fox – see for more info:http://www.bishopfox.com/