Re: Strange WLAN behavior

[Adam Mooz <adam.mooz () gmail com>]

First thing I have to confirm is the unknown MAC address, is it broadcasting an SSID or not?

Secondly, could you clarify what the network looks like?  I.e. what you think it's supposed to be vs. what it is?

It sounds like there's a rogue/malicious AP hijacking your internet, I'd suggest you cloak your SSID, implement MAC 
address filterting, and change your password ASAP.  

-----------------------------------------------------------------
Adam Mooz
Adam.Mooz () gmail com
http://www.AdamMooz.com

On 2010-03-30, at 9:37 AM, Norealenemy wrote:

> Hello out there,
>
> since a couple of days my wife complained her bad wireless connection.
> She said that the System (XP) often disconnects and sometimes the
> connect messages says "connected to MyWLAN(insecure)" The WLAN is WPA2
> protected using a very log PW including special characters.
>
> So yesterday I had some time to play with her laptop and was wondering
> as I saw that her system told me to be connected to "MyWLAN" with 54
> MBits on the router she was connected with 48 MBits.
>
> I started kismet on my laptop and was sniffing the air on my channel.
> First thing I was wondering, was that MyWLAN has 7 (up to 9) Clients,
> but the most strange thing was, that when I was generating traffic on
> her laptop I saw the packet count growing on her and an absolute unknown
> MAC address. The packet count stops on both addresses and starts again
> growing when I start the ping (or anything else generating traffic)
> again.
>
> Does that mean that my wifes laptop connects to an attacker AP, that is
> forwarding her packets?
>
> - How can I find out who it is? 
> - What would you do next?
> - Is there a way to prevent such attacks?
>
>
> Thanks in advance Jensemann
>
> -- 
>
>           ,  ,                 __.   .  .          
> .    ,._.*-+--+-_ ._    _ ._   (__  _.|_ | _ ._ ._ *
> \/\/ [  | |  |(/,[ )  (_)[ )  .__)(_.[ )|(/,[_)[_)|
>                                             |  |   
> _, _, ,  _,    _, _,    _, _,   , ._,  _, _,  _, _, 
> '_)|.|/| |.|___|.|'_)___'_)|.|  /| |_ *'_)'_)*'_)'_) 
> /_.|_|.|.|_|   |_|._)   ._)|_|  .|.._)*/_./_.*/_./_. 
>
>
>
> ------------------------------------------------------------------------
> Securing Apache Web Server with thawte Digital Certificate
> In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, 
> how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, 
> purchase, install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for 
> set-up are highlighted to help you ensure efficient ongoing management of your encryption keys and digital 
> certificates.
>
> http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
> ------------------------------------------------------------------------

Attachment: smime.p7s
Description: