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Thread: Good WPA-PSK handshake capture but dictionaries known to have passphrase not working

  1. #1
    Just burned his ISO
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    Mar 2010
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    Question Good WPA-PSK handshake capture but dictionaries known to have passphrase not working

    Hey all,

    I just registered for the forums but have been reading through and working with BT4 for a few weeks now. I've learned how to crack WEP on my own network and moved on to WPA-PSK today. I've got a good capture from airodump and aireplay from my network but no matter what I do aircrack says that the passphrase isn't in my dictionary. I've put the passphrase in a dictionary three times just to be sure, made a dictionary with only the passphrase, and changed the passphrase to "warriors" which is found in the /pentest/wireless/aircrack-ng/test/Password.lst file, yet none of the three have worked. I'm using a Linksys WRT54G v.6 AP and an Alfa AWUS036H adapter and the injection and de-auth works fine and I capture a handshake.

    Seems I'm doing everything right, but it's got me stumped. Any ideas?

    Thanks for any input

  2. #2
    Senior Member hypervista's Avatar
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    Feb 2010
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    Default Re: Good WPA-PSK handshake capture but dictionaries known to have passphrase not work

    Try deauthenticating with a higher count, as in:

    aireplay-ng -0 15 -a <AP> -c <client MAC> <iface>
    The standard is aireplay-ng -0 1 <yadda yadda>, However, I've found that increasing the number of deauths helps to ensure you get a good handshake. (Hat tip to Batsley).

    When I'd get a WPA handshake with the standard deauth of 1, often aircrack-ng would not find the passphrase in the list. But when I increase the deauths, it seems to work better.

  3. #3
    Just burned his ISO
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    Default Re: Good WPA-PSK handshake capture but dictionaries known to have passphrase not work

    I think I ran it with 10 deauths just to be sure. I'll try it with double when I get home.

    I'm actually sitting in my Security+ class discussing BT and its uses, but I'm bored now since I've been working with it in my downtime.

    Thanks hyper, I was beginning to think I was on my own on that one.

  4. #4
    Just burned his ISO
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    Cool Re: Good WPA-PSK handshake capture but dictionaries known to have passphrase not work

    flip,

    Just following up if raising the deauth the key to get a good handshake. I may have fallen the same boat as you are. I wanted to try it out myself but i left my dongle at home and won't be back for another week. Hi-5 to Batsley & Hypervista.

    Brae

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