How many ivs to crack wep

We include the -channel , number 11 , and we add --write to store all of the packets that we capture into a file, which is basic-test-ap. As we run the preceding command, we will be able to see the output in the following screenshot, the target network that we have as the data we gathered it is quite a busy one, also the data and the frames are going:.

It is a busy network; the following is the section where we can see the clients:. All we have to do now is launch aircrack-ng , which is part of the aircrack suite, against the file that airodump has created for us. We can launch aircrack against it even if we didn't stop airodump ; it will keep reading the file, and it will read the new packets that airodump is capturing.

The command to use is as follows: aircrack-ng basic-test-ap When we use aircrack-ng , we will put in the filename basic-test-ap While the file is still being created, getting larger and larger with the inclusion of new packets, we can run aircrack-ng , and it will keep getting updated, eventually giving us the password we need for cracking.

If aircrack fails to determine the key, aircrack waits until it reaches 5, IVs, and then tries again. There are two types of. WEP encryption: bit and bit. The only difference is the length of the key; obviously,. Remember that when we discussed aircrack , we indicated that the more packets we get without unique IVs, the higher our chances of cracking the WEP key are.

Now, we basically wait until aircrack can successfully crack the WEP key. As we can see in the following screenshot, aircrack has successfully managed to get the key within data packets; this is because the target AP uses a bit key:.

Let's look at how we can use this key to connect to the network. We are going to copy the key and use the key too connect. We can then connect to the target network:. Now that we know that in order to crack a WEP key we need to actually sniff as many packets as we can, we need to capture a lot of packets so we can get two packets with the same IVs or same random number on them. So we will be sniffing data using airodump-ng.

If you find anything helpful in this post or funny, will you please leave a like because you will feel great helping other people find it? We used airodump-ng in the previous videos and I told you how we can actually target a specific AP or target a specific Wi-Fi we want to capture packets from. So in order to hack WEP, we are going to use airodump-ng and with airodump-ng we are going to use aircrack-ng.

So airodump-ng will be capturing the packets and what aircrack-ng is going to do is that aircrack-ng will be trying to read those IVs. Aircrack-ng will be trying to read that bit random number I told you about in the previous video, and it is going to run statistical attacks on it and then when it finds two packets with the same IV it will crack the WEP key for us.

So airodump-ng is very easy. We just need to put channel and then bssid and then write the output. Using aircrack-ng is even more easy. We just type in aircrack-ng and after that we are going to write the file name. The file name is similar to the file name in airodump-ng. It will actually be the file in which we are capturing the packets. So it is going to get more clear when we actually do it. So now I am going to say airodump-ng wlan0mon to check the Wi-Fi available for us and here is our test network.

After that we specify the channel, and the channel is 1, and then we give it the output file name. So we can say here output-wep-crack or you can give it any name you want and after that we are going to say wlan0mon. So, it is very easy.

Airodump-ng —bssid of the Wi-Fi or network we are trying to hack or crack the key, then channel and then the name of output file and then the interface monitor mode it is running on. So it is very easy. We say aircrack-ng and after that we have to put the file name. So we say output -wep-crack and then the capture file. So, we have this file available.

Step 4 - Use aireplay-ng to do a fake authentication with the access point. Step 5 - Start aireplay-ng in ARP request replay mode. Step 6 - Run aircrack-ng to obtain the WEP key. First, this solution assumes: You are using drivers patched for injection. Use the injection test to confirm your card can inject prior to proceeding. You are physically close enough to send and receive access point packets.

Remember that just because you can receive packets from the access point does not mean you may will be able to transmit packets to the AP.

The wireless card strength is typically less then the AP strength. So you have to be physically close enough for your transmitted packets to reach and be received by the AP. You should confirm that you can communicate with the specific AP by following these instructions.

There is at least one wired or wireless client connected to the network and they are active. The reason is that this tutorial depends on receiving at least one ARP request packet and if there are no active clients then there will never be any ARP request packets. You are using v0. If you use a different version then some of the common options may have to be changed. Here are the basic steps we will be going through: Start the wireless interface in monitor mode on the specific AP channel.

It should look similar to this: lo no wireless extensions. The system will respond: lo no wireless extensions. Enter: aireplay-ng -9 -e teddy -a C:7E ath0 Where: -9 means injection test.

Open another console session to capture the generated IVs. Then enter: airodump-ng -c 9 --bssid C:7E -w output ath0 Where: -c 9 is the channel for the wireless network. This eliminate extraneous traffic. To associate with an access point, use fake authentication: aireplay-ng -1 0 -e teddy -a C:7E -h F:BAC ath0 Where: -1 means fake authentication. The long period also causes keep alive packets to be sent.

Default is multiple and this confuses some APs. Some access points are configured to only allow selected MAC addresses to associate and connect. If this is the case, you will not be able to successfully do fake authentication unless you know one of the MAC addresses on the allowed list.

If you suspect this is the problem, use the following command while trying to do fake authentication. Start another session and…. If at any time you wish to confirm you are properly associated is to use tcpdump and look at the packets. Open another console session and enter: aireplay-ng -3 -b C:7E -h F:BAC ath0 It will start listening for ARP requests and when it hears one, aireplay-ng will immediately start to inject it.

Read packets got ARP requests , sent packets Is the source mac associated? All your injected packets will be ignored. You must return to the fake authentication step Step 3 and successfully associate with the AP. This is optional since when we originally captured the data, we applied a filter to only capture data for this one AP.

Be sure to read all the documentation on the Wiki for the various commands used in this tutorial. See Tutorial: I am injecting but the IVs don't increase.

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