This step assumes you've already set your wireless network interface in monitor mode. It can be checked by executing the iwconfig command. Next step is finding available wireless networks, and choosing your target:. To capture data into a file, we use the airodump-ng tool again, with some additional switches to target a specific AP and channel.
Most importantly, you should restrict monitoring to a single channel to speed up data collection, otherwise the wireless card has to alternate between all channels. Assuming our wireless card is mon0, and we want to capture packets on channel 6 into a text file called data:. Running airodump-ng on a single channel targeting a specific access point Notes: You typically need between 20, and 40, data packets to successfully recover a WEP key.
One can also use the "--ivs" switch with the airodump-ng command to capture only IVs, instead of whole packets, reducing the required disk space. However, this switch can only be used if targeting a WEP network, and renders some types of attacks useless. Increase Traffic aireplay-ng - optional step for WEP cracking. An active network can usually be penetrated within a few minutes.
However, slow networks can take hours, even days to collect enough data for recovering the WEP key. The aireplay-ng command should be executed in a separate terminal window, concurrent to airodump-ng. It requires a compatible network card and driver that allows for injection mode. You may also want to read the information available -here-.
To see all available replay attacks, type just: aireplay-ng. WEP cracking is a simple process, only requiring collection of enough data to then extract the key and connect to the network. You can crack the WEP key while capturing data. In fact, aircrack-ng will re-attempt cracking the key after every packets.
Usually, between 20k and 40k packets are needed to successfully crack a WEP key. It may sometimes work with as few as 10, packets with short keys. What this means is, you need to wait until a wireless client associates with the network or deassociate an already connected client so they automatically reconnect. All that needs to be captured is the initial "four-way-handshake" association between the access point and a client.
This can be obtained using the same technique as with WEP in step 3 above, using airodump-ng. You may also try to deauthenticate an associated client to speed up this process of capturing a handshake, using:. Note the last two numbers in brackets [ ACKs] show the number of acknowledgements received from the client NIC first number and the AP second number.
It is important to have some number greater than zero in both. If the first number is zero, that indicates that you're too far from the associated client to be able to send deauth packets to it, you may want to try adding a reflector to your antenna even a simple manilla folder with aluminum foil stapled to it works as a reflector to increase range and concentrate the signal significantly , or use a larger antenna.
Simple antenna reflector using aluminum foil stapled to a manilla folder can concentrate the signal and increase range significantly. For best results, you'll have to place the antenna exactly in the middle and change direction as necessary. Of course there are better reflectors out there, a parabolic reflector would offer even higher gain, for example. See related links below for some wordlist links.
You can, then execute the following command in a linux terminal window assuming both the dictionary file and captured data file are in the same directory :. After that, an offline dictionary attack on that handshake takes much longer, and will only succeed with weak passphrases and good dictionary files. My record time was less than a minute on an all-caps character passphrase using common words with less than 11, tested keys!
A modern laptop can process over 10 Million possible keys in less than 3 hours. This prevents the statistical key-grabbing techniques that broke WEP, and makes hash precomputation more dificult because the specific SSID needs to be added as salt for the hash.
There are some tools like coWPAtty that can use precomputed hash files to speed up dictionary attacks. Those hash files can be very effective sicne they're much less CPU intensive and therefore faster , but quite big in size. The external PIN exchange mechanism is susceptible to brute-force attacks that allow for bypassing wireless security in a relatively short time few hours.
The only remedy is to turn off WPS, or use an updated firmware that specifically addresses this issue. To launch an attack:. Set your network adapter in monitor mode as described above, using:. Alternatively, you can put your network card in monitor mode using: airmon-ng start wlan0 this will produce an alternate adapter name for the virtual monitor mode adapter, usually mon0.
Before using Reaver to initiate a brute-force WPS attack, you may want to check which access points in the area have WPS enabled and are vulnerable to the attack. You can identify them using the "wash" Reaver command as follows:. Run Reaver it only requires two inputs: the interface to use, and the MAC address of the target. There are a number of other parameters that one can explore to further tweak the attack that are usually not required, such as changing the delay between PIN attempts, setting the tool to pause when the access point stops responding, responding to the access point to clear out failed attempts, etc.
The above example adds "-vv" to turn on full verbose mode, you can use "-v" instead for fewer messages. Reaver has a number of other switches check with --help , for example " -c11" will manually set it to use only channel 11, " --no-nacks" may help with some APs. Spoof client MAC address if needed.
Reaver supports MAC spoofing with the --mac option, however, for it to work you will have to change the MAC address of your card's physical interface wlan0 first, before you specify the reaver option to the virtual monitor interface usually mon0. To spoof the MAC address:. Note that some routers may lock you out for a few minutes if they detect excessive failed WPS PIN attempts, in such cases it may take over 24 hours.
I hate to tell you this but yes, doing it on your own can take forever. The tool is fluxion. Instead of doing this, it performs a little bit of phishing where the already connected user is asked to enter password of WiFi network again for security reason and when the user enter the password, first the handshake is checked with the earlier captured handshake of the device, if handshake is correct that means the password entered by user is correct.
Once it is successful, Fluxion returns the key required to authenticate the network. Anyone in the WiFi range can connect his device to the network without any password in enjoy free internet. However, these networks are rarely available and also risky. It will show you what network interface are you using. In my system, I have only one network interface card wlan0 , which is my wireless interface card.
Create a network interface which runs in monitor mode. To do this enter command airmon-ng start wlan0. Make sure to replace wlan0 in command with the interface name that your card have. Here, mon0 has been created. Now, you might or might not get the warning appearing in the below screenshot which tells other processes using the network which can create the problem. So, you can kill them using the syntax: kill PID if you know those processes are not important for you at the moment.
It can take time to all the available WiFi networks in range. First enter the command airplay-ng -1 0 -a FB:A9:B1 mon0 to perform fake authentication -1 in command to the network. Hit enter and the command will start doing attack to WEP WiFi Access point and you can see the Data value increasing at enormously fast rate. Because if someone is not doing anything on their device it means that no data packets are in the networks and we need data packets.
We need to capture thousands of data packets. So for now we are just going to wait and let aircrack-ng do its thing and in some time it is going to crack the key for us.
So now we managed to actually crack that key and you can see that this is the IV and we have the password here which is testpassword1 and it took almost one lakh and 80, IVs for the aircrack-ng to crack it. So you just need to be patient to capture as much IVs as you can, as much data packets as you can, because hacking can actually get very hectic when you have to be very patient and you need to wait for things to happen.
So sometimes it will happen for you in 10, IVs or 10, data packets and sometimes it can take about two lakh or three lakh IVs too. So for me it happened in almost one lakh and 80, IVs and now what I am going to do is I am going to turn off my monitor mode so I can check if I can connect with this network or not.
So you can see that we got connected to the test network with this key we found with aircrack-ng which is testpassword1. And another thing.
We only managed to do it just because we had two devices connected to the network and there was a lot of data packets, and we got to capture a lot of data packets. And then we found the IV and then aircrack did its thing. You finished this tutorial on Ethical Hacking in This is a part of a complete Start Ethical Hacking Course in on my education and business platform Uthena.
I found and hired and paid Bilal Shah to make this course for you because I imagined how much you need it and it helped you for your professional development.
We are actively working and getting new videos for you as fast as we can. You also get access to a Facebook group and a Discord Server for answers to questions. Will you please buy the Jerry Banfield Forever bundle , because that helps me keep hiring more people to make awesome courses for you. Skip to content 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.
Okay, so one thing we need to be clear about is if we are in monitor mode or not. So I am not in monitor mode. So I am going to turn my monitor mode on. So we have monitor mode active in wlan0mon. This is the Wi-Fi we were trying to hack.
0コメント