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How to Hack Wi-Fi: Cracking WPA2-How to Hack Wi-Fi: Cracking WPA2-PSK Passwords with CowpattyPSK Passwords with Cowpatty

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Welcome, my hacker novitiates!

As part of my series on hacking Wi-Fi, I want to demonstrate another excellentpiece of hacking software for cracking WPA2-PSK passwords. In my last post, wecracked WPA2 using aircrack-ng. In this tutorial, we'll use a piece of softwaredeveloped by wireless security researcher Joshua Wright called cowpatty (oftenstylized as coWPAtty). This app simplifies and speeds up the dictionary/hybridattack against WPA2 passwords, so let's get to it!

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Cowpatty is one of the hundreds of pieces of software that are included in theBackTrack suite of software. For some reason, it was not placed in the/pentest/wireless directory, but instead was left in the /usr/local/bindirectory, so let's navigate there.

cd /usr/local/bin

Because cowpatty is in the /usr/local/bin directory and this directory shouldbe in your PATH, we should be able to run it from any directory in BackTrack.

To get a brief rundown of the cowpatty options, simply type:

cowpatty

BackTrack will provide you a brief help screen. Take a note that cowpatty requiresall of the following.

a word lista file where the password hash has been capturedthe SSID of the target AP

Just as in cracking with aircrack-ng, we need to put the wireless adapter intomonitor mode.

airmon-ng start wlan0

Next, we need to start a capture file where the hashed password will be storedwhen we capture the 4-way handshake.

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Step 1: Find the CowpattyStep 1: Find the Cowpatty

Step 2: Find the Cowpatty Help ScreenStep 2: Find the Cowpatty Help Screen

Step 3: Place the Wireless Adapter in Monitor ModeStep 3: Place the Wireless Adapter in Monitor Mode

Step 4: Start a Capture FileStep 4: Start a Capture File

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airodump-ng --bssid 00:25:9C:97:4F:48 -c 9 -w cowpatty mon0

This will start a dump on the selected AP (00:25:9C:97:4F:48), on theselected channel (-c 9) and save the the hash in a file named cowcrack.

Now when someone connects to the AP, we'll capture the hash and airdump-ngwill show us it has been captured in the upper right-hand corner.

Now that we have the hash of the password, we can use it with cowpatty andour wordlist to crack the hash.

cowpatty -f /pentest/passwords/wordlists/darkc0de.lst -r/root/cowcrack-01.cap -s Mandela2

As you can see in the screenshot above, cowpatty is generating a hash of everyword on our wordlist with the SSID as a seed and comparing it to the capturedhash. When the hashes match, it dsplays the password of the AP.

Although running cowpatty can be rather simple, it can also be very slow. Thepassword hash is hashed with SHA1 with a seed of the SSID. This means thatthe same password on different SSIDs will generate different hashes. Thisprevents us from simply using a rainbow table against all APs. Cowpatty musttake the password list you provide and compute the hash with the SSID for eachword. This is very CPU intensive and slow.

Cowpatty now supports using a pre-computed hash file rather than a plain-textword file, making the cracking of the WPA2-PSK password 1000x faster! Pre-computed hash files are available from the Church of WiFi, and these pre-computed hash files are generated using 172,000 dictionary file and the 1,000

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Step 5: Capture the HandshakeStep 5: Capture the Handshake

Step 6: Run the CowpattyStep 6: Run the Cowpatty

Step 7: Make Your Own HashStep 7: Make Your Own Hash

Once you have a meterpreter connection, youcan do anything you want. You own hiscomputer!

Master,

I am curious. ... I have successfully exploitedmy roommates pc and have a meterpreterconnection. Can I or can I not jamm his pcwithout sending a link that he has to click.

Pheonix


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AMERICANPATRIOT

1

6 months ago Reply

Nice work.

SANDEEPAGRAWAL

1

6 months ago Reply

Great work .. .appreciated......

STANWILLIAMS

1

6 months ago Reply

awesome, I love the way you explain the details, thanks a lot.

1 thats awsome.............. i love it,..... buh cant someone do dis without a wirelessadaptor? pls reply me

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most popular SSIDs. As useful as this is, if your SSID is not in that 1,000, thehash list really doesn't help us.

In that case, we need to generate our own hashes for our target SSID. We cando this by using an application called genpmk. We can generate our hash file forthe "darkcode" wordlist for the SSID "Mandela2" by typing:

genpmk -f /pentest/passwords/wordlists/darkc0de.lst -d hashes -s Mandela2

Once we have generated our hashes for the particular SSIDs, we can then crackthe password with cowpatty by typing:

cowpatty -d hashfile -r dumpfile -s ssid

Keep coming back for more on Wi-Fi hacking and other hacking techniques!Haven't seen the other Wi-Fi hacking guides yet? Check them out here. If youhave questions on any of this, please ask them in the comments below. If it'ssomething unrelated, try asking in the Null Byte forum.

How to Hack Wi-Fi: Cracking WPA2-PSK Passwords Using Aircrack-Ng How to Hack Wi-Fi: Getting Started with Terms and Technologies iOS 6 Broke Your Wi-Fi? Here's How to Fix Connection Problems on

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Step 8: Using Our HashStep 8: Using Our Hash

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LIJOKAJOSEPHAYODELE 6 months ago - edited 6 months ago Reply

thanks... kudos

ALIJABARI

1

6 months ago Reply

absolutely not !do you know what this application will do after using it??

it will try a very very long list of passwords and checks the result,when it findsany true password it will save it to a target file.so if you have not any Wifirouter it cannot try that passwords to find out what is true.right?

SECRETKING

1

2 months ago Reply

master OTW

how many powerfull dictionaries are in bt...other than darkc0de & rockyou.......would u plz like to suggest some other powerfull dictionary for dictionary attack towpa psk.......and why can't i use JTR with aircrack-ng...

OCCUPYTHEWEB

1

2 months ago Reply

Secret:

There are numerous wordlists on the web. Simply google them.

Aircrack-ng and JTR do the same thing. Why would you want to use themtogether?

OTW

SECRETKING

1

2 months ago Reply

thnx master ...understand.....

SEBASTIANNIELSEN

1

last month Reply

Otw i find this wifi hack in backtrack 5 r3 i cant upload the video just look at it intoyoutubeI will leave a link:http://m.youtube.com/watch?v=AsHZLcz2s4shttp://m.youtube.com/watch?v=AsHZLcz2s4s

SEBASTIANNIELSEN

1

last month Reply

Master otw can you please look at this video, it looks like its a better wifi hackprogram in backtrack 5 r3... Is it true???

http://m.youtube.com/watch?v=AsHZLcz2s4s

OCCUPYTHEWEB

1

last month Reply

Sebastian:

Try it and if it works, great!

OTW

PRINCEKASHIF

1

2 weeks ago Reply

bahi donwload nahin ho raha he help

NILSHAGNER

1

6 days ago Reply

Is there a way to crack passwords without a word list? (If you don't have a wordas a password)

OCCUPYTHEWEB

1

6 days ago Reply

Your approach to cracking passwords is dependent upon what type of encryptionis used. If it is WEP, no wordlist is necessary. WPA2 needs a wordlist. If it usesWPS it is a bit easier.

What do you mean by not using a word as a password?


SECRETKING

1

6 days ago Reply

master what is diffent from cracking aircrack-ng and cowpetty???

NILSHAGNER

1

4 days ago Reply

I mean a code like ag>H/@uspLA or whatever never occours in a wordlist

OCCUPYTHEWEB

1

4 days ago Reply

Nils:

Many of the wordlists contain code like that. Its a misnomer to call them awordlist as they include things other than words, but what else would you callthem?

OTW

NILSHAGNER

1

2 days ago Reply

crazy stuff....But thanks for your answer!will go on reading :)

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