cracking_wpa [Aircrack-ng]
Wireless networks secured by WPA / WPA2 can be cracked. But it's not as easy as cracking WEP. {multithumb} {mospagebreak toctitle= Introduction} Introduction.
We have updated our tutorial on how to crack WPA / WPA2 with even more powerful and easier to use passphrase recovery tools. We've also added tips for creati.
This tutorial walks you through cracking WPA/WPA2 networks which use pre-shared keys. I recommend you do some background reading to better understand what WPA/WPA2 is. The Wiki links page has a WPA/WPA2 section. The best document describing WPA is Wi-Fi Security - WEP, WPA and WPA2. This is the link to download the PDF directly. The WPA Packet Capture Explained tutorial is a companion to this tutorial. WPA/WPA2 supports many types of authentication beyond pre-shared keys. aircrack-ng can ONLY crack pre-shared keys. So make sure airodump-ng shows the network as having the authentication type of PSK, otherwise, don't bother trying to crack it. There is another important difference between cracking WPA/WPA2 and WEP. This is the approach used to crack the WPA/WPA2 pre-shared key. Unlike WEP, where statistical methods can be used to speed up the cracking process, only plain brute force techniques can be used against WPA/WPA2. That is, because the key is not static, so collecting IVs like when cracking WEP encryption, does not speed up the attack. The only thing that does give the information to start an attack is the handshake between client and AP. Handshaking is done when the client connects to the network. Although not absolutely true, for the purposes of this tutorial, consider it true. Since the pre-shared key can be from 8 to 63 characters in length, it effectively becomes impossible to crack the pre-shared key. The only time you can crack the pre-shared key is if it is a dictionary word or relatively short in length. Conversely, if you want to have an unbreakable wireless network at home, use WPA/WPA2 and a 63 character password composed of random characters including special symbols. The impact of having to use a brute force approach is substantial. Because it is very compute intensive, a computer can only test 50 to 300 possible keys per second depending on the computer CPU. It can take hours, if not days, to crunch through a large dictionary. If you are thinking about generating your own password list to cover all the permutations and combinations of characters and special symbols, check out this brute force time calculator first. You will be very surprised at how much time is required. IMPORTANT This means that the passphrase must be contained in the dictionary you are using to break WPA/WPA2. If it is not in the dictionary then aircrack-ng will be unable to determine the key. There is no difference between cracking WPA or WPA2 networks. The authentication methodology is basically the same between them. So the techniques you use are identical. It is recommended that you experiment with your home wireless access point to get familiar with these ideas and techniques. If you do not own a particular access point, please remember to get permission from the owner prior to playing with it. I would like to acknowledge and thank the Aircrack-ng team for producing such a great robust tool. Please send me any constructive feedback, positive or negative. Additional troubleshooting ideas and tips are especially welcome. The objective is to capture the WPA/WPA2 authentication handshake and then use aircrack-ng to crack the pre-shared key. This can be done either actively or passively. “Actively” means you will accelerate the process by deauthenticating an existing wireless client. “Passively” means you simply wait for a wireless client to authenticate to the WPA/WPA2 network. The advantage of passive is that you don't actually need injection capability and thus the Windows version of aircrack-ng can be used. Here are the basic steps we will be going through: Here is typical output when there are no handshakes found: Opening psk-01.cap Opening psk-02.cap Opening psk-03.cap Opening psk-04.cap Read 1827 packets. No valid WPA handshakes found. When this happens you either have to redo step 3 (deauthenticating the wireless client) or wait longer if you are using the passive approach. When using the passive approach, you have to wait until a wireless client authenticates to the AP. Here is typical output when handshakes are found: Opening psk-01.cap Opening psk-02.cap Opening psk-03.cap Opening psk-04.cap Read 1827 packets. # BSSID ESSID Encryption 1 00:14:6C:7E:40:80 teddy WPA (1 handshake) Choosing first network as target. Now at this point, aircrack-ng will start attempting to crack the pre-shared key. Depending on the speed of your CPU and the size of the dictionary, this could take a long time, even days. Here is what successfully cracking the pre-shared key looks like: Aircrack-ng 0.8 [00:00:00] 2 keys tested (37.20 k/s) KEY FOUND! [ 12345678 ] Master Key : CD 69 0D 11 8E AC AA C5 C5 EC BB 59 85 7D 49 3E B8 A6 13 C5 4A 72 82 38 ED C3 7E 2C 59 5E AB FD Transcient Key : 06 F8 BB F3 B1 55 AE EE 1F 66 AE 51 1F F8 12 98 CE 8A 9D A0 FC ED A6 DE 70 84 BA 90 83 7E CD 40 FF 1D 41 E1 65 17 93 0E 64 32 BF 25 50 D5 4A 5E 2B 20 90 8C EA 32 15 A6 26 62 93 27 66 66 E0 71 EAPOL HMAC : 4E 27 D9 5B 00 91 53 57 88 9C 66 C8 B1 29 D1 CB
- WPA Cracker - Portable Penetrator Wifi Password finder - Crack WEP WPA WPA2 encrypted networks - Make Sure you dont get hacked Click for Info.
- Afin de se mettre en conformité avec la législation française, la rédaction de Cachem a décidé de retirer cet article. Celui-ci n'existe plus. Pour rappel.
- How to Crack a Wpa2-Psk Password with Windows. First you need to be capture the Wpa2, four-way handsake with CommView. Open commView and click on the Start option.