Brute Force Wifi Cracker Mac

Brute Force Wifi Cracker Mac

Wireless networks are accessible to anyone within the router’s transmission radius. This makes them vulnerable to attacks. Hotspots are available in public places such as airports, restaurants, parks, etc.

In this tutorial, we will introduce you to common techniques used to exploit weaknesses in wireless network security implementations. We will also look at some of the countermeasures you can put in place to protect against such attacks.

Topics covered in this tutorial

Brute force tools crack Wi-Fi security in hours, millions of wireless routers vulnerable. If you set WPA/WPA2 security protocol on your home or small business wireless router, and you think your Wi-Fi is secure, there two recently released brute force tools that attackers may use to bypass your encryption and burst your security bubble. Overview Wi-Fi Crack allows you to crack any wireless network with WEP security. Powered by AirCrack-NG, the popular, cross-platform, wireless security cracking command-line tool, Wi-Fi Crack you a takes you step-by-step through process of cracking the security of a WEP-based wireless network using a beautiful OS X graphical user interface.

What is a wireless network?

A wireless network is a network that uses radio waves to link computers and other devices together. The implementation is done at the Layer 1 (physical layer) of the OSI model.

How to access a wireless network?

You will need a wireless network enabled device such as a laptop, tablet, smartphones, etc. You will also need to be within the transmission radius of a wireless network access point. Most devices (if the wireless network option is turned on) will provide you with a list of available networks. If the network is not password protected, then you just have to click on connect. If it is password protected, then you will need the password to gain access.

Wireless Network Authentication

Since the network is easily accessible to everyone with a wireless network enabled device, most networks are password protected. Let’s look at some of the most commonly used authentication techniques.

WEP

WEP is the acronym for Wired Equivalent Privacy. It was developed for IEEE 802.11 WLAN standards. Its goal was to provide the privacy equivalent to that provided by wired networks. WEP works by encrypting the data been transmitted over the network to keep it safe from eavesdropping.

WEP Authentication

Open System Authentication (OSA) – this methods grants access to station authentication requested based on the configured access policy.

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Shared Key Authentication (SKA) – This method sends to an encrypted challenge to the station requesting access. The station encrypts the challenge with its key then responds. If the encrypted challenge matches the AP value, then access is granted.

WEP Weakness

WEP has significant design flaws and vulnerabilities.

  • The integrity of the packets is checked using Cyclic Redundancy Check (CRC32). CRC32 integrity check can be compromised by capturing at least two packets. The bits in the encrypted stream and the checksum can be modified by the attacker so that the packet is accepted by the authentication system. This leads to unauthorized access to the network.
  • WEP uses the RC4 encryption algorithm to create stream ciphers. The stream cipher input is made up of an initial value (IV) and a secret key. The length of the initial value (IV) is 24 bits long while the secret key can either be 40 bits or 104 bits long. The total length of both the initial value and secret can either be 64 bits or 128 bits long.The lower possible value of the secret key makes it easy to crack it.
  • Weak Initial values combinations do not encrypt sufficiently. This makes them vulnerable to attacks.
  • WEP is based on passwords; this makes it vulnerable to dictionary attacks.
  • Keys management is poorly implemented. Changing keys especially on large networks is challenging. WEP does not provide a centralized key management system.
  • The Initial values can be reused

Because of these security flaws, WEP has been deprecated in favor of WPA

WPA

WPA is the acronym for Wi-Fi Protected Access. It is a security protocol developed by the Wi-Fi Alliance in response to the weaknesses found in WEP. It is used to encrypt data on 802.11 WLANs. It uses higher Initial Values 48 bits instead of the 24 bits that WEP uses. It uses temporal keys to encrypt packets.

WPA Weaknesses

  • The collision avoidance implementation can be broken
  • It is vulnerable to denial of service attacks
  • Pre-shares keys use passphrases. Weak passphrases are vulnerable to dictionary attacks.

How to Crack Wireless Networks

WEP cracking

Cracking is the process of exploiting security weaknesses in wireless networks and gaining unauthorized access. WEP cracking refers to exploits on networks that use WEP to implement security controls. There are basically two types of cracks namely;

  • Passive cracking– this type of cracking has no effect on the network traffic until the WEP security has been cracked. It is difficult to detect.
  • Active cracking– this type of attack has an increased load effect on the network traffic. It is easy to detect compared to passive cracking. It is more effective compared to passive cracking.

WEP Cracking Tools

  • Aircrack– network sniffer and WEP cracker. Can be downloaded from http://www.aircrack-ng.org/
  • WEPCrack– this is an open source program for breaking 802.11 WEP secret keys. It is an implementation of the FMS attack. http://wepcrack.sourceforge.net/
  • Kismet- this can include detector wireless networks both visible and hidden, sniffer packets and detect intrusions. http://www.kismetwireless.net/
  • WebDecrypt– this tool uses active dictionary attacks to crack the WEP keys. It has its own key generator and implements packet filters. http://wepdecrypt.sourceforge.net/

WPA Cracking

WPA uses a 256 pre-shared key or passphrase for authentications. Short passphrases are vulnerable to dictionary attacks and other attacks that can be used to crack passwords. The following tools can be used to crack WPA keys.

  • CowPatty– this tool is used to crack pre-shared keys (PSK) using brute force attack. http://wirelessdefence.org/Contents/coWPAttyMain.htm
  • Cain & Abel– this tool can be used to decode capture files from other sniffing programs such as Wireshark. The capture files may contain WEP or WPA-PSK encoded frames. http://www.softpedia.com/get/Security/Decrypting-Decoding/Cain-and-Abel.shtml

General Attack types

  • Sniffing– this involves intercepting packets as they are transmitted over a network. The captured data can then be decoded using tools such as Cain & Abel.
  • Man in the Middle (MITM) Attack– this involves eavesdropping on a network and capturing sensitive information.
  • Denial of Service Attack– the main intent of this attack is to deny legitimate users network resources. FataJack can be used to perform this type of attack. More on this in article

Cracking Wireless network WEP/WPA keys

It is possible to crack the WEP/WPA keys used to gain access to a wireless network. Doing so requires software and hardware resources, and patience. The success of such attacks can also depend on how active and inactive the users of the target network are.

We will provide you with basic information that can help you get started. Backtrack is a Linux-based security operating system. It is developed on top of Ubuntu. Backtrack comes with a number of security tools. Backtrack can be used to gather information, assess vulnerabilities and perform exploits among other things.

Some of the popular tools that backtrack has includes;

  • Metasploit
  • Wireshark
  • Aircrack-ng
  • NMap
  • Ophcrack

Cracking wireless network keys requires patience and resources mentioned above. At a minimum, you will need the following tools

A wireless network adapter with the capability to inject packets (Hardware)

  • Kali Operating System. You can download it from here https://www.kali.org/downloads/
  • Be within the target network’s radius. If the users of the target network are actively using and connecting to it, then your chances of cracking it will be significantly improved.
  • Sufficient knowledge of Linux based operating systems and working knowledge of Aircrack and its various scripts.
  • Patience, cracking the keys may take a bit of sometime depending on a number of factors some of which may be beyond your control. Factors beyond your control include users of the target network using it actively as you sniff data packets.

How to Secure wireless networks

In minimizing wireless network attacks; an organization can adopt the following policies

  • Changing default passwords that come with the hardware
  • Enabling the authentication mechanism
  • Access to the network can be restricted by allowing only registered MAC addresses.
  • Use of strong WEP and WPA-PSK keys, a combination of symbols, number and characters reduce the chance of the keys been cracking using dictionary and brute force attacks.
  • Firewall Software can also help reduce unauthorized access.

Hacking Activity: Crack Wireless Password

In this practical scenario, we are going touse Cain and Abel to decode the stored wireless network passwords in Windows. We will also provide useful information that can be used to crack the WEP and WPA keys of wireless networks.

Decoding Wireless network passwords stored in Windows

  • Download Cain & Abel from the link provided above.
  • Open Cain and Abel
  • Ensure that the Decoders tab is selected then click on Wireless Passwords from the navigation menu on the left-hand side
  • Click on the button with a plus sign
  • Assuming you have connected to a secured wireless network before, you will get results similar to the ones shown below
  • The decoder will show you the encryption type, SSID and the password that was used.

Summary

  • Wireless network transmission waves can be seen by outsiders, this possesses many security risks.
  • WEP is the acronym for Wired Equivalent Privacy. It has security flaws which make it easier to break compared to other security implementations.
  • WPA is the acronym for Wi-Fi Protected Access. It has security compared to WEP
  • Intrusion Detection Systems can help detect unauthorized access
  • A good security policy can help protect a network.

Even in modern times, breaking through a wireless network is not as easy as it sounds. If you’re in need for a certain tool or software which helps to crack open passwords used in wireless networks, then the WiFi Cracker tool is the right one for you. Some of the most recommended WiFi Cracker tools are discussed in this article. Use any of these tools to break through all kinds of password protected wireless networks.

Related:

Password Cracker

Password Cracker is a free tool used to find out the passwords from various wireless networks in and around your area. This WiFi Cracker software tool comes with useful features which help to reveal the encrypted passwords with ease. Crack through any password protected wireless networks using this handy tool.

WiFi Hacker

WiFi Hacker is a WiFi Cracker tool used for hacking all sorts of wireless networks which are password protected. Break or Open any WiFi network using this simple software tool which can be downloaded for free. This tool can be customized according to your convenience and it also removes threats from your devices.

Fern WiFi Cracker

Fern WiFi Cracker tool is similar to WiFi Cracker 4.6.2 Free Download and can be downloaded in any of the online websites. The latest version of this tool comes with several bug fixes, search options, and customizable settings. It can help you open up any kind of password protected wireless networks.

Wifi Cracker Software for other Platforms

Brute Force Wifi Cracker Mac

A wide number of WiFi Cracker tools are being introduced nowadays due to the rise in demands of the customers. These tools support all the various platforms and you can search online to find out the best one for your device. Install the tool in your device to start hacking wireless networks.

Wi-Fi Crack for Mac

WiFi Crack for Mac allows users to crack open any kind of wireless network with utmost ease. This WiFi Cracker tool comes with powerful command line tools which help in collecting the WEP password from the network. All 64-bit Mac devices containing OS X 10.7 and higher versions support this tool.

WiFi Cracker Software for Android – WiFi Hacker Simulated

WiFi Hacker Simulated looks out for all the wireless networks near to you and finds out the password used in those networks. Use this WiFi Cracker Android application to perform deep analysis of networks and recovery of lost keys. This tool can be installed in all devices using Android 2.2 and higher versions.
Content

Wifi Hacking

WiFi Hacking tool helps to break open all sorts of wireless networks with ease. WiFi Cracker Windows application requires the use of several technologies which help in easy detecting and password identification of protected wireless networks. The wireless configuration needs to be checked for errors so that the software works without any interruptions.

Most popular WiFi Cracker Software – WiFi Wireless Cracker

Fern WiFi Wireless Cracker tool is the most popular WiFi Cracker tool used in recent times due to its wireless attack feature and security auditing tool. Recover all sorts of keys and passwords, run attacks on all wireless networks, discover network traffic and do much more using this free WiFi Cracker tool.

What is WiFi Cracker Software?

WiFi Cracker Software can be used to hack through all sorts of wireless networks in and around your location. Discover the flow of network traffic, find out lost keys, restore last used passwords, identify network host and unlock all kinds of wireless networks using this handy tool. You can also see WiFi Signal Booster

WiFi Cracker helps users to customize network settings and performs analysis for identification of wireless networks near you. It comes with a simple interface and uses various inbuilt commands to crack open WiFi networks with ease. Customize network keys and access all kinds of wireless networks using this user-friendly WiFi Cracker software tool. You can also see Wi-Fi Analyzer Software

WiFi Cracker Software tool can be used by both amateurs as well as professional users. These tools provide all the necessary features which help to crack into most of the WiFi networks near your area. Choose any of the above-mentioned software tools to start hacking wireless networks right away. Wind onda connection manager mw833up software for mac windows 7.

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