1. How To Crack Wpa2 Password
2. How To Crack Wep In Windows With Commview For Wifi
3. How To Crack Wep Password
4. How To Crack Wep On Mac
5. How To Crack Wep Wifi Password Windows 7
6. Crack Wep Key

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.

Breaking any encryption coding or codes involves knowing a few things. First, you have to know that there is an encryption scheme. Secondly, you must know how encryption works. Breaking any code manually is near impossible; luckily, you can break the WEP encryption if you use a packet-sniffing program. Jul 02, 2019  It is straightforward to use and user-friendly software. In 2012 it was a best Wifi Password Cracker tool, which cracks the WEP keys and other wifi security. Her is a step by step guideline to crack someone WiFi password so, and this is a perfect article for you.

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

This article teaches you how to easily crack WPA/WPA2 Wi-Fi passwords using the Aircrack-Ng suite In Kali Linux. Not only will you learn the basics, but I will also provide you the best tips and educational resources on increasing your chances of executing successful dictionary-based brute force attacks on captured WPA handshakes. How to Crack a Wep Protected Wi Fi With Airoway and Wifislax - Cracking the WEP Start the scanning process. Enter the command 'airodump-ng wifi0'. Open Airoway. Select the channel. Wait for packets to accumulate. Copy the key. CloudCracker is an online password cracking tool to crack WPA keys of Wireless network. This tool can also be used to crack various other kind of password hashes. You only need to upload the handshake file and enter the network name to start the attack. You already know that if you want to lock down your Wi-Fi network, you should opt for WPA encryption because WEP is easy to crack. But did you know how easy? METHOD 1: HACK WiFi NETWORK USING AIRCRACK (How to Crack WiFi password) Step 1: Configure your wireless card. First things first: disconnect from all wireless networks. Step 2: Control Your Network. Then you will receive a list of all networks in your area. Step 3: Capturing a Handshake.

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.

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.

Cracking WEP Encrypted passwords is a child's play . We have many tutorials explaining how to crack passwords. Then why am I writing this? I am writing this as a introductory material to my next article where I explain what really happens in WEP and how Kali Linux cracks the password, each and every step in detail.

As far as this post is concerned, this is just another another post in the Internet which helps you in cracking WEP Passwords.

This is purely for Educational Purposes. I am not responsible for your actions. Keeping that in mind , let's start the game

Kali Linux works on only few wifi adapters. Assuming you are aware of those Chipsets , we will move forward. If you are not aware of that please google for it before you continue reading any further. Here is a link which might help you

Setting our Adapter in Monitor Mode

How To Crack Wpa2 Password

Open a terminal and type the following command and hit enter as shown in the figure below.

This shows us details about our WIFI Adapter. I am using a USB Adapter as my Dell's inbuilt adapter doesn't support.

The word highlighted in the picture is our adapter Interface Name. we need to set this interface in monitor mode to capture packets ( what is monitor mode ? Explanation in next article)

Notice our interface wlan0 is set in monitor mode and now its name is wlan0mon. ( notice the second last sentence in the end ). Also we need to kill few processes and their PID is displayed on the screen. We can kill each one of them individually but their is one straight way of killing all at once. Type the below command.

How To Crack Wep In Windows With Commview For Wifi

Changing Mac Address ( Optional but safety first )

Type the below commands one by one.

Searching for Access Points around you

Type the following command to search for all WIFI Access points in your region

after hitting enter you will see all the list of access points around you

Here lets select the access point which has WEP Encryption and as you see above there is only one like that and that is loadme! ( Note ENC for Encryption and ESSIS for name ).

Capturing Packets of selected access point

Now lets capture packets of the WIFI that we want to hack. Type the following command to do so.

airodump-ng --bssid <mac address of router> -w <file name to store packets > -c <channel num > <interface in monitor mode > ( you will find all these details when you search for WIFI around you ).

then you will see something like this on your screen after you hit the above command.

Now lets understand this. The first line here shows details about the router . The second line shows details about routers and connected devices to it. I highlighted a column Data here. This is most important , this is what helps us in understanding whether we have enough packets to crack the password. The column STATION in second line shows list of devices connected to the router. This devices sends packets and we capture them, these packets count is what is displayed in the Data. If you dont have any device connected, it difficult to crack.

Though their are devices connected sometimes you wont get data packets quickly. you might have to wait for sometime . but here we will not wait for force to send packets.

Forcing to send Data packets using Fake Auth

How To Crack Wep Password

Open a new terminal and type the following command to connect to router using fakeAuth.

This means your adapter is now associated with the router ( doesn't mean you can without password, you are still not connected ). you can see the mac address of your adapter and the remaining text explains you the rest.

Go to the terminal which captures Data , now you can see in the last part of the screen under column of STATION you can see the mac address of your WIFI Adapter. Don't stop the process, let it continue.

Get packets from target router

This is the main phase , this is what boosts data packets and the terminal which is still running data capture pulls these .

Type the following command

How To Crack Wep On Mac

Read the text in the terminal and you will understand the process. Once this starts , go back to the terminal which captures data packets and observe the packets in the Data column, it raises exponentially.

Generally the packets count should we greater than 10000 for us to crack . Lets try this. Open a new terminal , do you remember we were capturing data packets in a file ? lets see what all files it generated . we have named our file as 'loadme'.

Open a new terminal and type

Cracking the Password using aircrack-ng

Type the following in a new terminal

Notice here it failed as we didn't get enough packets. wait for those number of data and type the same command again

There you go. that's the WEP Password

Final Steps

Hit CTRL+C in all the open terminals. Open a new terminal and type the following commands

That's it. Have a nice day

How To Crack Wep Wifi Password Windows 7

Crack Wep Key