Spoonwep cracking WEP-encrypted wireless route Password

This afternoon, when I used an unencrypted wireless network, a WEP encrypted route with the same name and frequency band appeared, and the signal was strong and the interference was great, which made me very uncomfortable, so I decided to crack it. However, it should be noted that only WEP encryption is effective (currently most of them are WEP Encryption by default). For WPA encryption, the time is too long, because it seems that random number encryption is used. Well, let's get down to the truth.

Lab environment:

Linux (this environment doesn't matter, because we need to download bt3 and start it from the CD)

Intel 3945abg ?)

It is worth mentioning that the network card has previously seen some windows cracking methods, using airodump + winaircrack to crack. For more information, see http://voip123.go.51.net/wireless/wireless1.html. However, if you have been familiar with Winpcap programming, you will know that Windows has strict NIC Management and APIs cannot be used for sniffing, the Winpcap driver must be installed before it can be set to hybrid mode and then listen to the package. Of course this is a digress. By analogy, it is not difficult to understand why only some NICs can find the supported drivers to crack the tutorial. (For example, My Dell d630 Nic 1390 is not supported, even though the chip is Broadcom 4311). Therefore, we need to go to Linux to operate it. This shows that Linux is powerful! In order to save trouble, I took my friend's Asus staff directly, that is, the intel 3945abg Nic. This network card also supports software in windows, such as omnipeek for cracking. For more information, see http://www.yj8.com.cn/blog/soft/227.html. However, the problem is that omnipeek is easy to make the system blue screen, which makes me very uncomfortable, and finally makes up my mind to go to Linux.

Preparation tools:

Back Track 3.iso

Connection: http://www.wlanbbs.com/viewthread.php? Tid = 16 & extra = Page % 3d1)

I downloaded an optical disc and engraved it into the CD. In fact, there is something similar to win PE. The following uses the optical disc version as an example.

Procedure:

Set the boot of the computer from the CD (Do I Have To Talk About It ?), Select the interface. Generally, select the first default KDE. You will be familiar with the Linux Startup screen and wait ......

Enter System

To open a shell, first set the NIC and enter "spoondrv". Then, click "show loaded" to display the currently loaded NIC Driver. Here we see "13. Intel PRO Wireless 3945 a/B/g-mac80211 ". However, this driver does not support packet capture in the mixed mode, so we need to uninstall it.

Uninstall the original driver: