How to Bypass WiFi Password (WEP, WPA & WPA2 Networks)? Cracking Wi-Fi passwords isn't a difficult task and it doesn't take much time. Hacking wireless networks are easy when compared to wired networks. Nov 27, 2013 WEP, short for wired equivalent privacy, is one of several encryption schemes used to secure wireless networks. At the time of conception, WEP was believed to be secure. However, a security flaw was found in the IV headers of data packets that makes it possible to crack WEP if enough IV headers are collected. I hope it helps anyone in search of a way to crack an encrypted WEP wireless network, from a Mac that is. SIDE NOTE: Hacking into other people's networks is illegal!
To spoof their MAC and inject packets, we can use the aireplay-ng command. We need the BSSID of the AP and the MAC address of the client who connected to the AP. We will be capturing an ARP packet and then replaying that ARP thousands of times in order to generate the IVs that we need to crack WEP. WEP Crack WEP cracks resemble WPA cracks in a lot of ways. To be true, breaching these wireless networks basically involve the same command-line tools.
This article shortly describes simple steps on how to crack a wireless WEP key using AIR Crack software. This can be done by sniffing a wireless network, capturing encrypted packets and running appropriate encryption cracking program in attempt to decrypt captured data. WEP ( Wired Equivalent Privacy ) is quite easy to crack as it uses only one key to encrypt all traffic. Basic principle is that communication between two nodes on the network is based on the MAC address. Each host receives packets only intended for MAC address of its own interface. The same principle also applies for a wireless networks. However, if one node sets its own network card into promiscuous mode it will also receive packets which are not addressed for its own MAC address.
To crack the WEP key a hacker needs to capture sample packets not intended for his own network interface and run crack program to compare testing keys against WEP key bundled with captured packets in attempt of decryption. The key which fits to decrypt captured packets is the key used by wireless network to encrypt its entire wireless communication with its connected stations.
The guide assumes that your have wireless network card installed and that it supports monitor mode. In this example I'm using Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller.
Debian:
Fedora:
Homepage:
aircrack-ng.org
First we need to identify name of our wireless network interface. If your wireless network card is installed correctly an iwconfig command will reveal the name of your wireless network interface:
In this guide i'm are going to crack a wireless WEP key of my own network. In this step I need to identify BSSID of the network I'm intending to crack and as well as its channel number:
Information we can retrieve from airodump-ng output:
BASE:
BSSID : 00:11:95:9F:FD:F4
Channel: 6
STATION:
MAC: 00:13:02:30:FF:EC
Station connected to my wireless router is my laptop with wireless network card running Debian lenny. It is important to have at least one station associated with base so we can capture packets from this communication.
BASE:
BSSID : 00:11:95:9F:FD:F4
Channel: 6
STATION:
MAC: 00:13:02:30:FF:EC
Station connected to my wireless router is my laptop with wireless network card running Debian lenny. It is important to have at least one station associated with base so we can capture packets from this communication.
At this stage we can start capturing packets between base and station. The following linux command will start capturing packets. It is recommended to capture at least 5000 packets. Number of packets required depends on WEP key length in use. I have managed to crack WEP key 64 bits long with 10 hex characters with around 6000 captured packets. Number 6 in the following linux command is a channel number of our wireless base station.
Capturing the packets may take some. aireplay-ng will create some traffic so we can capture more packets for a given time. Since we are hacking our own network, browsing internet on my laptop also helps to create some traffic.
As a last step we crack WEP key by using captured packets and aircrack-ng command. All captured packets are now stored in data-capture-01.cap file.
NOTE: do not stop capturing process as you do not know if current amount of captured packed is satisfactory to crack WEP key.
NOTE: do not stop capturing process as you do not know if current amount of captured packed is satisfactory to crack WEP key.
In this tutorial we will see how easy it is to crack WEP encryption on a wireless access point. WEP is now very outdated, after it’s easy vulnerability was exposed. However you will still find some access points using WEP, and for educational purposes I wish to demonstrate how easy it is to break, which should encourage you to switch to WPA if you haven’t done so already.
It is also a good starting point for you to learn the basics of how to use airodump-ng and aircrack-ng tools within the terminal window.
I’m using the Kali Linux distribution that comes with these tools already installed. If you haven’t done so already I advise you download and setup a USB live drive running Kali Linux. If you’re a mac user you will find this tutorial useful as I also address the wireless driver issues that frequently plague Mac users trying to run aircrack.
STEP 1
First we will run airodump-ng to scan for available wireless networks and identify one running WEP that we wish to connect to.
First we will run airodump-ng to scan for available wireless networks and identify one running WEP that we wish to connect to.
As you can see there’s several networks with WEP available, we will target the last in the list. press control c to stop airodump and run the following command
airodump-ng -w <directory to write the file to> -c <channel number> –bssid <MAC of target access point> <wireless interface>
airodump-ng -w <directory to write the file to> -c <channel number> –bssid <MAC of target access point> <wireless interface>
As you can see I am saving the captured packets to a local directory on my system, and I set the channel and BSSID to the channel and bossed indicated in our initial scan. Finally as I am using a mac I have got the prism0 wireless interface which is being used for wireless monitoring. If you’re on another machine I assume you have already enabled monitor mode with the airmon-ng command.
Crack Wep Macbook
When you hit enter airodump will then begin gathering packets and writing them tot he capture file. You will need to capture around 10,000 IV’s before it will be possible to start cracking the WEP encryption, typically I have found I need around 2,000 IV’s to be successful.
STEP 2
Leave the terminal window open with airodump capturing packets, and start a new terminal window. Here will run aircrack-ng with the following command
aircrack-ng <directory to the capture file>
Leave the terminal window open with airodump capturing packets, and start a new terminal window. Here will run aircrack-ng with the following command
aircrack-ng <directory to the capture file>
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When you hit enter aircrack-ng will open the capture file and begin to try to crack the WEP encryption. If successful it will display the result in Hexadecimal code. If it’s not successful it will indicate not enough IV’s have been captured. Simply leave the window open it will automatically retry when the next 5k IV’s have been captured.
Crack Wep Mac Filtering Enabled
When you finally have captured enough IV’s it will display the successfully cracked password in Hexadecimal format. You can use an online converter tool to convert this to ASCII characters if you wish, or enter the HEX without the : separators.