Wireless hacking

PREPARED BY : MIHIR S.SHAHENROLLMENT NO :6011

WIRELESS HACKING

CONTENTS

INTRODUCTION WHY? HOW? PREVENTION NUTS AND BOLTS

Introduction Wireless networking technology is

becoming increasingly popular but at the same time has introduced many security issues.

The popularity in wireless technology is driven by two primary factors - convenience and cost.

It works on standard IEEE 802.11 group.

SSID

Service Set Identification Your router broadcasts the name of ur

n/w (SSID) n allows others to connect wirelessly to ur n/w.

This feature can also b disabled. If u choose to disable ur SSID

broadcasting u ll need to setup a profile in ur wless n/w mgmt s/w on ur wless clients using SSID u ‘ve chosen..

Wireless LAN standards of IEEE's 802.11 group 802.11a Frequency - 2.4000 GHz to 2.2835GHz

802.11b Frequency - 5.15-5.35GHz to 5.725-5.825GHz

802.11g Frequency - 2.4GHz

Wireless uses Radio Frequency

2.4 Ghz wifi spectrum

5 Ghz wifi spectrum

Types of Wireless Connection WEP

WPA

WPA/PSK

WEP

Abbreviation for Wired Equivalent Privacy. IEEE chose to employ encryption at the

data link layer according to RC4 encryption algorithm.

Breakable even when configured correctly…

Can b broken in as small as 3 min..

WPA Stands for Wi-Fi Protected Access. Hashing algorithm is used in WPA. md4 for WPA I md5 for WPA II md6 for WPA III

WPA (contd.)

Created to provide stronger security than WEP.

Still able to be cracked if a short password is used.

If a long passphrase or password is used, these protocol are virtually uncrackable.

Even with good passwords or phrases, unless you really know what your doing, wireless networks can be hacked…

WPA/PSK

Strongest now-a-days. Theoretically un-breakable. But yet is somehow possible to crack

it…

A little info…

When a user uses wireless internet they generate what are called data “packets”.

Packets are transmitted between the transmitting medium and the wireless access point via radio waves whenever the device is connected with the access point.

Some More…

Depending on how long the device is connected, it can generate a certain number of packets per day.

The more users that are connected to one access point, the more packets are generated.

HOW TO CRACK??

First… You must locate the wireless signal This can be done by using your default

Windows tool “View Available Wireless Network”

More useful tools include NetStumbler and Kismet. Kismet has an advantage over the other because it can pick up wireless signals that are not broadcasting their SSID.

Second…

Once you located a wireless network you can connect to it unless it is using authentication or encryption.

If it is using authentication or encryption then the next step would be to use a tool for sniffing out and cracking WEP keys.

Third…

Once any of the tools has recovered enough packets it will then go to work on reading the captured information gathered from the packets and crack the key giving you access.

Other tools (such as CowPatty) can use dictionary files to crack hard WPA keys.

Tools For WEP Hacking

Kismet : War-driving with passive mode scanning and sniffing 802.11a/b/g, site survey tools

Airfart : Wireless Scanning and monitoring

BackTrack: Linux Base Os to crack WEP

Airjack : MITM Attack and DoS too

WEPCrack : Cracking WEP

Hacking Through Router’s MAC Address

Find Router MAC

Change Your MAC

Find User’s MAC

Change MAC according To User’s

MAC

Commands Used

Using Following command we can get password of WEP network

• ifconfig• iwconfig• macchanger• airmon-ng• airdump-ng• airreplay-ng• aircrack-ng

Description of Commandsifconfig – interface configuration tool similar but more powerful than ipconfig

iwconfig – interface wireless configuration tool

macchanger – allows you to change the mac address of the card (Spoofing)

airmon-ng – puts the card into monitor mode (promiscuous mode) allows the card to capture packets

airdump-ng – capturing and collecting packets

aireplay-ng – used to deauthenticate and generate traffic

aircrack-ng – used to crack WEP and WPA

Prevent Your Network from Getting Hacked Don’t broadcast your SSID . This is usually

done during the setup of your wireless router. Change the default router login to something

else. If your equipment supports it, use WPA or

WPA/PSK because it offers better encryption which is still able to be broken but much harder.

Always check for updates to your router. Turn off your router or access point when not

using it.

Prevent Your Network from Getting Hacked There is no such thing as 100% percent

security when using wireless networks but at least with these few simple steps you can make it harder for the average person to break into your network.

NUTS AND BOLTS ??

Thank You