Simple crack wep

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. Common pins are , , , etc. Reaver attempts known default pins first. Reaver comilation requires libpcap pcap-devel and sq3-devel sqlite3-dev installed, or you will get a "pcap library not found" error. Here are some points to consider:. Is your adapter properly set in monitor mode?

Does the adapter driver support injection is aireplay-ng working? Do you have a good signal to the AP? Do you see associated clients for WPA handshake capture? As demonstrated above, WEP cracking has become increasingly easier over the years, and what used to take hundreds of thousands packets and days of capturing data can be accomplished today within 15 minutes with a mere 20k data frames. Simply put, cracking WEP is trivial. However, weak passphrases are vulnerable to dictionary attacks.

An extensive list of vulnerable devices is available here: google docs spreadsheet. Username: Password: forgot password? Run start monitor command.

Due to a bug, set the channel manually where? Inject packets into a wireless network to generate traffic. A wireless packet capture tool for aircrack-ng. Create dump working directory. A Unable to find dump directory. This part of the aircrack-ng suite determines. The first method is via the. The main advantage of the PTW. Additionally, the program offers a dictionary method for determining.

By hearing every packet, we can later select some for injection. As well, only there are some rare exceptions monitor mode allows you to inject packets. Note: this procedure is different for non-Atheros cards. If there are any remaining athX interfaces, then stop each one. This is important. You must have your wireless card locked to the AP channel for the following steps in this tutorial to work correctly.

This is because the madwifi-ng drivers are being used. For other drivers, use the wireless interface name. In the response above, you can see that ath0 is in monitor mode, on the 2. Please note that only the madwifi-ng drivers show the MAC address of your wireless card, the other drivers do not do this.

So everything is good. It is important to confirm all this information prior to proceeding, otherwise the following steps will not work properly.

This will give you the frequency for each channel. The purpose of this step ensures that your card is within distance of your AP and can inject packets to it.

The last line is important. If it is low then you are too far away from the AP or too close. If it is zero then injection is not working and you need to patch your drivers or use different drivers. See the injection test for more details. The purpose of this step is to capture the IVs generated. This step starts airodump-ng to capture the IVs from the specific access point.

In order for an access point to accept a packet, the source MAC address must already be associated. In this state, no new IVs are created because the AP is ignoring all the injected packets. The lack of association with the access point is the single biggest reason why injection fails. Remember the golden rule: The MAC you use for injection must be associated with the AP by either using fake authentication or using a MAC from an already-associated client. Do not proceed to the next step until you have the fake authentication running correctly.

Notice that the access point c:7e is telling the source F:BAC you are not associated. Meaning, the AP will not process or accept the injected packets. The purpose of this step is to start aireplay-ng in a mode which listens for ARP requests then reinjects them back into the network.

Again, this is our objective, to obtain a large number of IVs in a short period of time. It will start listening for ARP requests and when it hears one, aireplay-ng will immediately start to inject it. You can confirm that you are injecting by checking your airodump-ng screen. The data packets should be increasing rapidly. However, decent depends on a large variety of factors. A typical range is to data packets per second. Two methods will be shown. It is recommended you try both for learning purposes.

Since this tutorial covers injection of ARP request packets, you can properly use this method. The other requirement is that you capture the full packet with airodump-ng.