I want to 'knock on their (virtual) door'

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yeswedeliver
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I want to 'knock on their (virtual) door'

Post by yeswedeliver » Mon May 14, 2012 10:37 am

I live in a large apartment building. I enjoy my wireless but have found so are many others! I am now learning how to lock it up - HOWEVER, I'd really like to learn how to - after discovering a computer on my network - how to hack in far enough for me to let him/her know - that I know - they are on my network and ought not be .... I do not want to hack and cause damage - just a little knock on the door.
Thnank for your help/
Yes! We Deliver

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Cool_Fire
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Re: I want to 'knock on their (virtual) door'

Post by Cool_Fire » Mon May 14, 2012 7:05 pm

First and foremost I would say: Lock that shit down. Get some WPA2 key on there, a long one with lots of mixed case, numbers and symbols, and change your network name (ESSID) to something unusual. (This is also used in the WPA2 key generation, so an odd ESSID prevents people using precomputed rainbow tables to crack your password faster.)

If you want to strike back however, start by doing a ping sweep to see who else is connected. (nmap -sP 192.168.0.1/24). Usually your router will also just keep a table of connected clients, and in some cases a history of connected clients too. Such lists should help you identify frequent network (ab)users by MAC address.

Depending on what security settings your network has now (if basically none), you may also be able to sniff their traffic and capture login data and hijack insecure sessions that user may be in. (Think: login to some website that doesn't use https.)

Besides that, you can try doing some port and vulnerability scans against connected clients. They may be running old or unupdated windows copies that have some known exploitable bug, or in some cases vulnerable or even unprotected services. (Like network and printer shares.)
If we're breaking the rules, then how come you can't catch us? You can't find us? I know why. Cause, it's ... MAGIC!
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psilocybin
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Re: I want to 'knock on their (virtual) door'

Post by psilocybin » Tue May 15, 2012 2:49 pm

Also, when locking your shit down, remember to disable WPS, which is enabled by default on many routers, because it can be brute forced in less than a day in most implementations. otherwise your carefully selected WPA key doesn't mean shit.

thrasher456
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Re: I want to 'knock on their (virtual) door'

Post by thrasher456 » Wed May 16, 2012 2:51 am

interesting
there are a few things i would like to say
first of all how to know if some one has connected to your network:
heres a neat nice tool called autoscan which has in built intruder detection so it will allert u as soon as anybody tries to join your WLAN or other network.
http://autoscan-network.com/

next up comes tools that you should be aware of to secure yourself :
1) aircrack-ng http://www.aircrack-ng.org/
2)Reaver http://code.google.com/p/reaver-wps/downloads/list

Reaver is latest and it is the most easiest way to crack wpa/wpa2 pass-phrases
Downside : Requires a lot of time :shock:
cheers

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