Wep0ff – Wireless WEP Key Cracker Tool
Darknet spilled these bits on January 19th 2007 @ 7:25 pm

Wep0ff is new tool to crack WEP-key without access to AP by mount fake access point attack against WEP-based wireless clients.

It uses combination of fragmentation and evil twin attacks to generate
traffic which can be used for KoreK-style WEP-key recovery.

This tool can be used to mount fake access point attack against WEP-based wireless clients.

This code tested patched madwifi-old drivers with athraw support, but also works with madwifi-ng. With madwifi-ng you need to create two virtual interfaces: one in master mode (for fake AP) and second in monitor mode (to listen on).

How to Use:
1. Setup fake AP with KARMA tools or iwconfig

iwpriv ath0 mode 2
iwconfig ath0 mode master essid foo enc 1122334455 channel 7
echo 1 > /proc/sys/dev/ath0/rawdev
echo 1 > /proc/sys/dev/ath0/rawdev_type
ifconfig ath0
up ifconfig ath0raw up

2. Start this program (./wep0ff ath0raw 00:01:02:03:04:05)
3. Wait until client connect to fake access point
4. Launch airodump-ng to collect packets
5. Launch aircrack-ng to recover WEP key

You can download it here:

Wep0ff

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comments are closed
  1. jimmy
    February 7th, 2007 | 11:01 pm

    hi what os is this used on?

  2. February 8th, 2007 | 3:09 am

    GNU/Linux

  3. DotSlashZero
    June 1st, 2007 | 9:20 pm

    Can it be used on Cygwin?
    i have a fedora in another computer but i’d do better in my laptop in which i only have cygwin… i gess i’d have to install a lot of software huh?
    like iwconfig or something?

  4. June 3rd, 2007 | 9:41 am

    DotSlashZero: I don’t tend to use tools like this on Cygwin as they require native driver support, which windows doesn’t give. I would suggest setting up a VMWare image of a Linux install or just use a liveCD like Backtrack to access tools like this.

  5. DotSlashZero
    June 3rd, 2007 | 1:13 pm

    VMWare image of a Linux? is that like a virtual linux within windows? i have a linux version called DSL Damn Small Linux and i think it does that… am i right?

  6. Chris
    November 29th, 2007 | 5:12 pm

    What of a Wepkey crack for windows?

  7. yogesh
    April 19th, 2008 | 8:41 pm

    good

  8. Hyper
    April 29th, 2008 | 2:19 pm

    Does these tools (airodump-ng, KARMA tools or iwconfig,aircrack-ng) work with all wireless cards. Because i have tried some other tools before and had to be atheros wireless card (something like this)

  9. bob
    July 27th, 2008 | 2:59 am

    hey dudes once you have a wep key how do you recover the original password from that

  10. shakezz
    August 6th, 2008 | 7:54 am

    i have a windows vista laptop and no wep hack programs seem to be compatible, can somebody suggest one.

  11. winx
    August 15th, 2008 | 1:35 pm

    most tools like this tend to require specific wifi cards (usb afaik just aint good enough) with specific chips atheros and prisim chips are (to my knowledge) the most widely used. look hard enough and you’ll find which ones are compatible with wep cracking tools

  12. sunny
    August 28th, 2008 | 7:05 pm

    i want this software comfortabe for win vista and wireless (dell wireless 1395 wlan mini card)

  13. maysiool
    December 5th, 2008 | 9:25 pm

    nice and good for everybody

  14. k-ryder
    December 9th, 2008 | 10:11 pm

    i have toshiba satellite laptop with Vista premium. will this program work on my pc or do i have to get another cpu like my IBM

  15. wepkey
    December 23rd, 2008 | 1:06 am

    hey men so how could we get this baby working im using windows vista your help is much appriciated thankx

  16. December 23rd, 2008 | 12:50 pm

    people ought to learn to read!! Dear Mr. wepkey, Wep0ff runs on the Linux OS, and does not run on the Windows Vista OS

    As such U need to either, a) install linux on your comp/lappy
    b)use a live CD (Backtrack is recommended by most L337 h@xors)
    c)Create a virtual drive using a tool like wubi (for ubuntu) on your system and install and run Linux off it

    Using these steps you can , as you put it, “get this baby working”

    n00b <– That my friend, is a complement of the highest order for people like U!! ;)

  17. Bogwitch
    December 23rd, 2008 | 2:00 pm

    Heh – I thought all the morons asking for Vista versions were trolling.

    That’s the Interwebs for ya!

  18. avinash
    March 27th, 2009 | 8:24 am

    which type of file or softwar .tar

  19. 3p1c
    April 7th, 2009 | 6:17 pm

    i’ve got a toshiba satellite with a 802.11a/g/n wireless, i been obtaining a few connections locally, i was wondering if you could help :D

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