wifi cryptoparty 2013
TRANSCRIPT
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DU LÄCKER DATA!Patrik Wallström, DFRI
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Geolokalisering
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Geo-lokalisering
Hur kan “location accuracy” förbättras med Wifi påslaget?
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GPS funkar inte inomhus... !
Vi är inomhus 90% av tiden.
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iPhone lagrar data• Information om wifi-accesspunkten (MAC, kanal, hidden, RSSI) !
• Information om telefonen (latitud, longitud, altitud, horisontell och vertikal noggrannhet, hastighet och kurs) !
• Ytterligare information som tidsstämpel, ålder, använd app, och trovärdighet !
Lagras i filen consolidated.db
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War driving
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War driving!Passiv lyssning på radiotrafiken... !
Alla wifi-nät är kartlagda med: !
ESSID MAC-adress Säkerhets- och autentiseringsprotokoll Geografisk position
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wigle.net
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MozStumbler
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Vad kan vi se om ditt nät?
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Kismet
• Lyssnar på “layer 2”
• Kan sniffa 802.11[a|b|g|n]
• Även DECT...
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Knäcka krypteringen
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Kartläggning
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Men din telefon då?
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tshark -n -i wlan0mon subtype probereq
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Falska AP:s...
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Ta bort nät då?
There is no way to selectively delete old wireless networks without being connected to them. If you use Settings -> General -> Reset -> Reset network setting all known wireless networks will be removed. You can then start fresh.
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Allmänna råd
• Skydda ditt egna wifi-nät med WPA2-PSK
• Använd HTTPS
• Vid anslutning av “okända” wifi-nät, använd VPN
• Slå av wifi i telefonen när du är ute och går
https://www.iis.se/lar-dig-mer/guider/it-sakerhet-for-privatpersoner/tradlosa-natverk/