If we try to turn up the power to the maximum on our Alfa wireless cards-1,000 mWs or 30 dBm-we get the error message below (some of the newer cards can actually transmit at 2,000 mWs or four times what is legally allowable in the U.S.).Īnd we can now see at the end of the second line that our power is now up to 30 dBm or 1000 milliwatts, enough to overwhelm all the other local access points even from several houses away! The Evil Twin Is Now Working In some cases, even boosting power to 500 mWs may prove to be inadequate. This command will boost our power output to the maximum legally allowable in the United States, 27 dBm or 500 milliwatts. We can boost our AP to maximum power by typing Even next door, this may work as most access points automatically down-regulate their power to the minimum necessary to maintain a connection to its clients. Don't let this deter us!įirst, we can turn up the power on our access point in attempt to be stronger than his. In airports and other public places, this is no problem, but in our scenario here, we don't have physical access and it's very likely that his AP is closer and stronger than ours. This could be a critical weakness when physical access is unavailable.

The crucial link in the evil twin hack is to make certain that our fake AP is closer or stronger than the original or authentic AP. If our signal is stronger than his own AP, he will automatically reconnect to our evil twin! Step 6: Turn Up the Power! Note that we once again used his BSSID in the aireplay-ng command. We can do this by using aireplay-ng with the deauth packet: When his computer tries to re-authenticate, he will automatically reconnect to the strongest AP with the ESSID of 'Elroy.' The 802.11 standard has a special frame called deauthentication that, as you might expect, deauthenticates everyone on the access point. Our next step is to bump the 'neighbor' off his access point. Step 5: Deauthentication or Bumping Him Off Where 00:09:5B:6F:64:1E is the BSSID, Elroy is the SSID, and - c 11 is the channel of the suspect's AP. They've asked us to investigate and determine whether he actually is, and if so, to collect evidence. We've been asked by a client to investigate the possibility that their neighbor is downloading and selling child pornography. In this scenario, we are a private investigator.

This is a powerful client-side hack that will enable us to see all of the traffic from the client and conduct a man-in-the middle attack. Our aircrack-ng suite has a tool, airbase-ng, that can be used to convert our wireless adapter into an access point. The evil twin AP is an access point that looks and acts just like a legitimate AP and entices the end-user to connect to our access point. Many new hackers are anxious to crack Wi-Fi passwords to gain some free bandwidth (don't worry, we'll get to that), but there are so many other Wi-Fi hacks that are far more powerful and put so much more at risk than a bit of bandwidth. Our first task will be to creating an evil twin access point.

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