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February 20, 2011


HowTo: Hack a wi-fi network

Doesn’t it suck when you see your laptop’s catching so many wi-fi signals but none of them is accessible.. don’t you feel like “I wish I could some how break the password and dive into the deep oceans of the information” I beleive everyone should be able to have free internet. If someday I make it big enough and I’ll be having ample money.. I promise I’ll provide free wifi hotspots all over the places.. “Let there be INTERNET”.. even If I don’t get rich.. I’ll become a politician and would make Internet a Fundemental right to every citizen.. Now that would be something..

That’s enough with the Castles in the air.. now lets get back to reality..
What I can do for you right now is that I can tell you how to hack a wifi network to access Internet.. Some would call it stealing.. some like me won’t..
I’ll call it Sharing.. Sharing is what on which the whole Internet is build upon…
So.. Here’s how we do it..

1) First we need to scan for available wireless networks.
Theres this great tool for windows to do this.. called “NetStumbler” or Kismet for Windows and Linux and KisMac for Mac
Below is a screenshot of NetStumbler.. It will show you a list of all the wireless access points in your range.

wifi Hacking | NetStumbler

It’ll also show how the Wi-fi network is secured..
The two most common encryption types are:
1. WEP

2. WAP
WEP i.e Wire Equivalent Privacy is not consideres as safe as WAP i.e Wireless Application Protocol.
WEP have many flaws that allows a hacker to crack a WEP key easily.. whereas

WAP is currently the most secure and best option to secure a wi-fi network..
It can’t be easily cracked as WEP because the only way to retreive a WAP key is to use a brute-force attack or dictionary atack.

Here I’ll tell you how to Crack WEP
To crack WEP we will be using Live Linux distribution called BackTrack to crack WEP.
BackTrack have lots of preinstalled softwares for this very purpose..
The tools we will be using on Backtrack are:
Kismeta wireless network detector
airodumpcaptures packets from a wireless router
aireplay forges ARP requests
aircrackdecrypts the WEP keys

1. First of all we have to find a wireless access point along with its bssid, essid and channel number. To do this we will run kismet by opening up the terminal and typing in kismet. It may ask you for the appropriate adapter which in my case is ath0. You can see your device’s name by typing in the command iwconfig.

2. To be able to do some of the later things, your wireless adapter must be put into monitor mode. Kismet automatically does this and as long as you keep it open, your wireless adapter will stay in monitor mode.

3. In kismet you will see the flags Y/N/0. Each one stands for a different type of encryption. In our case we will be looking for access points with the WEP encryption. Y=WEP N=OPEN 0=OTHER(usually WAP).

4. Once you find an access point, open a text document and paste in the networks broadcast name (essid), its mac address (bssid) and its channel number. To get the above information, use the arrow keys to select an access point and hit <ENTER> to get more information about it.

Network Stumbler | hack wifi | Learn Hacking
5. The next step is to start collecting data from the access point with airodump. Open up a new terminal and start airodump by typing in the command:
airodump-ng -c [channel#] -w [filename] –bssid [bssid] [device]
In the above command airodump-ng starts the program, the channel of your access point goes after -c , the file you wish to output the data goes after -w , and the MAC address of the access point goes after –bssid. The command ends with the device name. Make sure to leave out the brackets.

6. Leave the above running and open another terminal. Next we will generate some fake packets to the target access point so that the speed of the data output will increase. Put in the following command:
aireplay-ng -1 0 -a [bssid] -h 00:11:22:33:44:55:66 -e [essid] [device]
In the above command we are using the airplay-ng program. The -1 tells the program the specific attack we wish to use which in this case is fake authentication with the access point. The 0 cites the delay between attacks, -a is the MAC address of the target access point, -h is your wireless adapters MAC address, -e is the name (essid) of the target access point, and the command ends with the your wireless adapters device name.

7. Now, we will force the target access point to send out a huge amount of packets that we will be able to take advantage of by using them to attempt to crack the WEP key. Once the following command is executed, check your airodump-ng terminal and you should see the ARP packet count to start to increase. The command is:
aireplay-ng -3 -b [bssid] -h 00:11:22:33:44:5:66 [device]
In this command, the -3 tells the program the specific type of attack which in this case is packet injection, -b is the MAC address of the target access point, -h is your wireless adapters MAC address, and the wireless adapter device name goes at the end.

8. Once you have collected around 50k-500k packets, you may begin the attempt to break the WEP key. The command to begin the cracking process is:
aircrack-ng -a 1 -b [bssid] -n 128 [filename].ivs
In this command the -a 1 forces the program into the WEP attack mode, the -b is the targets MAC address, and the -n 128 tells the program the WEP key length. If you don’t know the -n , then leave it out. This should crack the WEP key within seconds. The more packets you capture, the bigger chance you have of cracking the WEP key.

Network Stumbler | hack wifi | Learn Hacking

I am sure it would have helped. 🙂


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About the author

Snehil Khanor wrote 131 articles on this blog.

Snehil Khanor - Entrepreneurial Spirit, Techie, Gadget Freak, Blogger, Dreamer, Internet Visionary, Foodie, Delhiite, Wannabe Artist ,To-be Engineer with a heart of a Poet. 😉

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52 Comments Post a comment
  1. thanks for sharing this useful information the way of explaination is too good

  2. Jun 21 2011

    click this link it will show u how to hack compuyers to give u free stuff, ive goten a xbox 360 free try it out

  3. ruby
    Jul 5 2011

    please can you help i’m stuck at this point of cracking

    i’ve installed backtrack 3 in a vmware machine also i’m using a tp link adapter for to do it
    this is the model tl- wn422g 54 mbps high gain
    i have wifi internet
    i can surf the internet (inside backtrack)
    but the problem starts when i type in the kernel console
    nothing appears in interface channel etc
    then i try iw config and also nothing detects and it’s frustrating because i’m connected to the internet
    please help me to solve my problem

  4. Mukesh daslania
    Sep 10 2011

    gd mrng sir,, i have w 7 nd i want to learn hacking so plz help me. plz guide to me.. ,, [email protected]

  5. Nov 1 2011

    That was an excellent article. You made some great points and I am thankful for your information! Thanks Again.

  6. saket khatri
    Dec 11 2011

    sir i want to hack a wi-fi………………….plz suggest

  7. Dec 20 2011

    Thanks for sharing, such a useful information. The way you explained is awesome.

  8. akshay hegde
    Jan 7 2012

    I want to hack wifi plz tel me how

  9. vishnu
    Jan 18 2012

    abe sale chodu ban rahe ho.. cahr go shrtfrm dal ke jii

  10. jyaul rain
    Mar 12 2012

    its really helpful

  11. Sometimes I stumble upon a blog post that perfectly answers a question that brought me to perform a search in the first place – your post is a good example of such a happy encounter. Thanks! 🙂
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  12. Apr 26 2012

    hey could send me the software to hack free net n wit intructions at
    [email protected]

  13. Apr 28 2012

    Very Useful Information. Thanks For Sharing.

  14. no me gusta el ingles pero tengo que saber a ser mis tareas 😀

  15. jaffar
    May 10 2012

    can u help me out
    how hack the computers

  16. May 10 2012

    nice views for hack wifi it can really help me.

  17. Johnm
    May 11 2012

    You can watch a great video tutorial here:

  18. sultan
    May 18 2012

    i want to download the software for wifi hack could any one rocommend the link or sites for downloading the wifi hack software..answers are being waited

  19. Elko1
    Jun 10 2012

    Nobody say: in windows hack realy is not possible.I tried many times and finaly concluded-only linux.If you have installed linux in computer
    no need any additionaly program.Only start cmd.exe and follow instruction.Very simple and fast.In couple minuts you can take password.In windows is so complicate and reqire more than 4hours for collecting enough number of packet.I spent plenty money for appropriate wi- fi adaptors for lap top.

  20. Elko1
    Jun 11 2012

    Sorry,rectification.To hack WEP in linux should install aircrack ng .
    Cmd-exe is in windows,in linux it is named terminal.Usualy no need
    more than find out password.No need back-track or another
    similar program.Not any problem about compatibility of adaptor.Only
    necessary start wireless card in lap top(blue light)Otherwise,program does not see your external adaptor.It is litle strangely but…

  21. Jul 16 2012

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  23. nikhil
    Jul 19 2012

    can anybody plz tell dat,
    has anyone tried it ‘coz it really hard to get all of it
    and really in windows hacking is a hard nut to crack.. :/

  24. tomexans
    Aug 14 2012

    Hmm, not to ellaborate , too simple like hacking is easy as 1 2 3, but overall nice points you got there.

  25. Aug 18 2012

    Cool wifi hack tutorial!

  26. Sky
    Sep 14 2012

    Plz can someone tel me how to browse the internet cuz am stoked hia in my home netwok. No internet acess bt the modern always get conected. Am usin MTN,Glo Airtel netwok in Nigeria. Any software or wateva. Plz hellllpppppppppppppp/ Tank you

  27. Sep 21 2012

    Do you use backtrack or windows?

  28. mani
    Oct 5 2012

    i want to how to hack in wifi

  29. pavan kumar
    Oct 22 2012

    i am visible with many wifi signals but i can’t acess them because of they are protected by passwords pls guid me to acess them “[email protected]

  30. Bhasker Pandey
    Oct 24 2012

    sir how we can find the hidden ssid name for a wifi
    and who to crach wap key

  31. Akibkhan
    Nov 29 2012

    tell me about hacking plzzzzzzz

  32. tell other wifi hack software

  33. thaios
    Dec 17 2012

    Hey,thanks for sharing how to hack a wifi.
    But how is the procedure going?I have to download :”kismet” ,then does this software needs to be programmed/assembled?I ve downloaded kismet and tried to work with it but i found that it is very complicated as i couldn`t find any instructions how to use it.

    Thank in advance

  34. superb information. it’s helpful for me. thanks for sharing this post.

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  35. Thanks for sharing such a nice post regards….

  36. Thanks for giving lots of great information and inspiration, both of which we all need. Regards..

  37. Great job and very well managed as well as described.

  38. Jun 18 2013

    Tried and works. Thanks a bunch

  39. Jul 3 2013

    i am really amazed when i saw that WiFi is also hacked and now i am grade 11 student i have great interested to use internet in my every day life but the situation in my country Ethiopia is very difficult but you know i am using internet because there is university near our home which have WiFi connections but the security is very high to enter university illegally this year so please if you can send the software to hack WiFi my computer is windows xp formatted remember there is WiFi connection next to our home. i hope you will share you idea thanks a lot and lot

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  41. Aug 17 2013

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  42. Aug 17 2013

    I will bookmark this page. Thanks for sharing this important information.

  43. Aug 27 2013

    thanks for such post and please keep it up.

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  48. Dec 21 2013

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  49. Dec 25 2013

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