Sometimes when you are on a network, you also want to check what is happening on the network. This happens mostly in big organizations, when an employer wants to check who is doing what in the network. For these things, there are a few network hacking tools available that let users analyze packets and see what other users are doing.
In this article, I am going to discuss wireless security and best wi-fi password cracking or recovery tools. I will explain the kind of encryption wireless networks use and how these tools can crack the networks to get access. We will also see what tools let users monitor networks.
Wireless Networks and Hacking
Wireless networks are based on IEEE 802.11 standards defined by IEEE(Institute of Electrical and Electronics Engineers) for ad hoc networks or infrastructure networks. Infrastructure networks have one or more access points which coordinate the traffic between the nodes. But in ad hoc networks, there is no access point; each node connects in a peer-to-peer way.
Basically there are two types of vulnerabilities which can be found in the Wireless LAN. One is poor configuration and the other is poor encryption. Poor configuration is caused by the network admin who manages the network. It may include the weak password, no security settings, use of default configurations, and other user related things. Poor encryption is related to security keys used to protect the wireless network. It is there because of issues in WEP or WPA.
WEP and WPA
WEP and WPA are the two main security protocols used in Wi-Fi LAN. WEP is known as Wired Equivalent Privacy (WEP). It is a deprecated security protocol which was introduced back in 1997 as a part of original 802.11 standards. But it was weak, and several serious weakness were found in the protocol. Now, this can be cracked within minutes. So, a new kind of security protocol was introduced in 2003. This new protocol was Wi-Fi Protected Access (WPA). It has mainly two versions, 1 and 2 (WPA and WPA2). Now it is the current security protocol used in wireless networks. To get unauthorized access to a network, one needs to crack these security protocols. There are many tools which can crack Wi-Fi encryption. These tools can either take advantage of WEP weaknesses or use bruteforce attacks on WPA/WPA2. I am sure now you know that you should never use WEP security.
Basically wireless hacking tools are of two types. One of which can be used to sniff the network and monitor what is happening in the network. And other kinds of tools are used to hack WEP/WPA keys. These are the popular tools used for wireless password cracking and network troubleshooting.
Aircrack is one of the most popular wireless passwords cracking tools which you can use for 802.11a/b/g WEP and WPA cracking. Aircrack uses the best algorithms to recover wireless passwords by capturing packets. Once enough packets have been gathered, it tries to recover the password. To make the attack faster, it implements a standard FMS attack with some optimizations.
The company behind the tool also offers an online tutorial where you can learn how to install and use this tool to crack wireless passwords. It comes as Linux distribution, Live CD and VMware image options. You can use any of these. It supports most of the wireless adapters and is almost guaranteed to work. If you are using a Linux distribution, the only drawback of the tool is that it requires deeper knowledge of Linux. If you are not comfortable with Linux, you will find it hard to use this tool. In this case, try Live CD or VMWare image. VMWare Image needs less knowledge, but it only works with a limited set of host OS, and only USB devices are supported.
Before you start using this too, confirm that the wireless card can inject packets. Then start WEP cracking. Read the online tutorial on the website to know more about the tool. If you will follow steps properly, you will end up getting success with this tool.
AirSnort is another popular tool for decrypting WEP encryption on a wi-fi 802.11b network. It is a free tool and comes with Linux and Windows platforms. This tool is no longer maintained, but it is still available to download from Sourceforge. AirSnort works by passively monitoring transmissions and computing encryption keys once it has enough packets received. This tool is simple to use. If you are interested, you can try this tool to crack WEP passwords.
3. Cain & Able
Cain & Able is a popular password cracking tool. This tool is developed to intercept network traffic and then discover passwords by bruteforcing the password using cryptanalysis attack methods. It can also recover wireless network keys by analyzing routing protocols. It you are trying to learn wireless security and password cracking, you should once try this tool.
Kismet is the wi-fi 802.11 a/b/g/n layer2 wireless network sniffer and IDS. It works with any wi-fi card which supports rfmon mode. It passively collects packets to identify networks and detect hidden networks. It is built on client/server modular architecture. It is available for Linux, OSX, Windows and BSD platforms.
NetStumbler is a popular Windows tool to find open wireless access points. This tool is free and is available for Windows. A trimmed down version of the tool is also available. It is called MiniStumbler.
Basically NetStumblet is used for wardriving, verifying network configurations, finding locations with a poor network, detecting unauthorized access points, and more.
But the tool also has a big disadvantage. It can be easily detected by most of the wireless intrusion detection systems available. This is because it actively probes a network to collect useful information. Another disadvantage of the tool is that it does not work properly with the latest 64 bit Windows OS. This is because the tool was last updated back in April 2004. It has been around 11 years since the last stable release of the tool.
Download Netstumbler: http://www.stumbler.net/
inSSIDer is a popular Wi-Fi scanner for Microsoft Windows and OS X operating systems. Initially the tool was opensource. Later it became premium and now costs $19.99. It was also awarded as “Best Opensource Software in Networking”. The inSSIDer wi-fi scanner can do various tasks, including finding open wi-fi access points, tracking signal strength, and saving logs with GPS records.
Download inSSIDer: http://www.inssider.com/
WireShark is the network protocol analyzer. It lets you check what is happening in your network. You can live capture packets and analyze them. It captures packets and lets you check data at the micro-level. It runs on Windows, Linux, OS X, Solaries, FreeBSD and others. WireShark requires good knowledge of network protocols to analyze the data obtained with the tool. If you do not have good knowledge of that, you may not find this tool interesting. So, try only if you are sure about your protocol knowledge.
Download Wireshark: https://www.wireshark.org/
CoWPAtty is an automated dictionary attack tool for WPA-PSK. It runs on Linux OS. This program has a command line interface and runs on a word-list that contains the password to use in the attack.
Using the tool is really simple, but it is slow. That’s because the hash uses SHA1 with a seed of SSID. It means the same password will have a different SSIM. So, you cannot simply use the rainbow table against all access points. So, the tool uses the password dictionary and generates the hack for each word contained in the dictionary by using the SSID.
The new version of the tool tried to improve the speed by using a pre-computed hash file. This pre-computed file contains around 172000 dictionary file for around 1000 most popular SSIs. But if your SSID is not in those 1000, you are unlucky.
Download CoWPAtty: http://sourceforge.net/projects/cowpatty/
Airjack is a Wi-Fi 802.11 packet injection tool. This wireless cracking tool is very useful in injecting forged packets and making a network down by denial of service attack. This tool can also be used for a man in the middle attack in the network.
Download AirJack: http://sourceforge.net/projects/airjack/
WepAttack is an open source Linux tool for breaking 802.11 WEP keys. This tool performs an active dictionary attack by testing millions of words to find the working key. Only a working WLAN card is required to work with WepAttack.
Download WebAttack: http://wepattack.sourceforge.net/
OmniPeek is another nice packet sniffer and network analyzer tool. This tool is commercial and supports only Windows operating systems. This tool is used to capture and analyze wireless traffic. But it requires you to have good knowledge of protocols to properly understand things. A good thing is that the tool works with most of the network interface cards available in market. This tool is used for network troubleshooting. This tool also supports plugins, and 40 plugins are already available to extend the features of the tool.
12. CommView for WiFi
CommView for WiFi is another popular wireless monitor and packet analyzer tool. It comes with an easy to understand GUI. It works fine with 802.11 a/b/g/n/ac networks. It captures every packet and displays useful information as a list. You can get useful information like access points, stations, signal strength, network connections and protocol distribution.
Captured packets can be decrypted by user-defined WEP or WPA keys.
This tool is basically for wi-fi network admins, security professionals, and home users who want to monitor their wi-fi traffic and programmers working on software for wireless networks.
Download CommView: http://www.tamos.com/products/commwifi/
CloudCracker is the online password cracking tool for cracking WPA protected wi-fi networks. This tool can also be used to crack different password hashes. Just upload the handshake file, enter the network name and start the tool. This tool has a huge dictionary of around 300 million words to perform attacks.
Try Cloudcracker: https://www.cloudcracker.com/