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- WEP Crack with Backtrack 3 By. 2008 by thepaperboi Powered by YouTube. This is a tutorial on how to crack a WEP code on a wireless access point.
- Sep 28, 2014. For more detail about Cracker low that uploaded on Youtube at Sun, 03: 05: 00. Comment Cracker Une Cl WEP En 3 Minutes Watch WiFi Password.
- To crack WEP, you need to exploit a weakness in its implementation, and collect lots of Initialisation Vectors (IVs). In normal WLAN traffic, it would take quite a.
This tutorial walks you though a very simple case to crack a WEP key. It is intended to build your basic skills and get you familiar with the concepts.
Solution Overview Step 1 - Start the wireless interface in monitor mode on AP channel Step 2 - Test Wireless Device Packet Injection Step 3 - Start airodump-ng to capture the IVs 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 This tutorial walks you though a very simple case to crack a WEP key. It is intended to build your basic skills and get you familiar with the concepts. It assumes you have a working wireless card with drivers already patched for injection. The basic concept behind this tutorial is using aireplay-ng replay an ARP packet to generate new unique IVs. In turn, aircrack-ng uses the new unique IVs to crack the WEP key. It is important to understand what an ARP packet is. This "What is an ARP?" section provides the details. For a start to finish newbie guide, see the Linux Newbie Guide. Although this tutorial does not cover all the steps, it does attempt to provide much more detailed examples of the steps to actually crack a WEP key plus explain the reason and background of each step. For more information on installing aircrck-ng, see Installing Aircrack-ng and for installing drivers see Installing Drivers . 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. 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 v0.9 of aircrack-ng. If you use a different version then some of the common options may have to be changed. To crack the WEP key for an access point, we need to gather lots of initialization vectors (IVs). Normal network traffic does not typically generate these IVs very quickly. Theoretically, if you are patient, you can gather sufficient IVs to crack the WEP key by simply listening to the network traffic and saving them. Since none of us are patient, we use a technique called injection to speed up the process. Injection involves having the access point (AP) resend selected packets over and over very rapidly. This allows us to capture a large number of IVs in a short period of time. Once we have captured a large number of IVs, we can use them to determine the WEP key. Here are the basic steps we will be going through: Substitute the channel number that your AP runs on for “9” in the command above. This is important. You must have your wireless card locked to the AP channel for the following steps in this tutorial to work correctly. Note: In this command we use “wifi0” instead of our wireless interface of “ath0”. This is because the madwifi-ng drivers are being used. For other drivers, use the wireless interface name. Examples: “wlan0” or “rausb0 ”. The system will respond: Interface Chipset Driver wifi0 Atheros madwifi-ng ath0 Atheros madwifi-ng VAP (parent: wifi0) (monitor mode enabled) You will notice that “ath0” is reported above as being put into monitor mode. To confirm the interface is properly setup, enter “iwconfig ”. The system will respond: lo no wireless extensions. wifi0 no wireless extensions. eth0 no wireless extensions. ath0 IEEE 802.11g ESSID:"" Nickname:"" Mode:Monitor Frequency:2.452 GHz Access Point: 00:0F:B5:88:AC:82 Bit Rate:0 kb/s Tx-Power:18 dBm Sensitivity=0/3 Retry:off RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=0/94 Signal level=-95 dBm Noise level=-95 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 In the response above, you can see that ath0 is in monitor mode, on the 2.452GHz frequency which is channel 9 and the Access Point shows the MAC address of your wireless card. 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. To match the frequency to the channel, check out: http://www.cisco.com/en/US/docs/wireless/technology/channel/deployment/guide/Channel.html#wp134132 . This will give you the frequency for each channel. If you are using 1.0-rc1, add the option “-K” for the FMS/KoreK attack. (1.0-rc1 defaults to PTW.) You can run this while generating packets. In a short time, the WEP key will be calculated and presented. You will need approximately 250,000 IVs for 64 bit and 1,500,000 IVs for 128 bit keys. If you are using the PTW attack, then you will need about 20,000 packets for 64-bit and 40,000 to 85,000 packets for 128 bit. These are very approximate and there are many variables as to how many IVs you actually need to crack the WEP key. Here is what success looks like: Aircrack-ng 0.9 [00:03:06] Tested 674449 keys (got 96610 IVs) KB depth byte(vote) 0 0/ 9 12( 15) F9( 15) 47( 12) F7( 12) FE( 12) 1B( 5) 77( 5) A5( 3) F6( 3) 03( 0) 1 0/ 8 34( 61) E8( 27) E0( 24) 06( 18) 3B( 16) 4E( 15) E1( 15) 2D( 13) 89( 12) E4( 12) 2 0/ 2 56( 87) A6( 63) 15( 17) 02( 15) 6B( 15) E0( 15) AB( 13) 0E( 10) 17( 10) 27( 10) 3 1/ 5 78( 43) 1A( 20) 9B( 20) 4B( 17) 4A( 16) 2B( 15) 4D( 15) 58( 15) 6A( 15) 7C( 15) KEY FOUND! [ 12:34:56:78:90 ] Probability: 100 % Notice that in this case it took far less then the estimated 250,000 IVs to crack the key. (For this example, the FMS/KoreK attack was used.)
How to Crack WEP By: Babolatace. Video Recommendations. 05:29 High-Definition. Uploaded on December 30, 2007 by Babolatace Powered by YouTube.