Mar 01, 2020 First of all, you have to click on the arrow over the right corner of your desktop. Then you have to select “Open Network and Sharing Center.” Then go to the Change Adapter Options. After that right-click on the Ethernet Port’s adapter. Step 1: Start Wireshark and capture traffic. In Kali Linux you can start Wireshark by going to. Application Kali Linux Top 10 Security Tools Wireshark. In Wireshark go to Capture Interface and tick the interface that applies to you. In my case, I am using a Wireless USB card, so I’ve selected wlan0. There are ways to hack into a WiFi network using known vulnerability exploits. You can easily use Wireshark to do such hacking without knowing much about network protocol. Wireshark is available on all popular operating systems including Linux, windows, and mac OSx. Wireshark is an important tool to learn for a security tester.
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
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. https://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)
Well for starters, you won’t have to switch between multiple devices since it’s much easier to do all your work from your Mac, and besides, typing is faster and more accurate on a computer than on a smartphone, and texting on your Mac helps to save your phone battery. So what’s there to hate?Now that you know what you stand to gain, let’s answer the next question which is, how do I send and receive text messages on my Mac.Well, first you have to have an iPhone and it has to be running at least iOS 8.1. Best productivity apps for mac. Once you have that covered simply toggle on the Text message Forwarding option under settings under messaging on your iPhone.
- 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.
Hello friends, In this tutorial, I’m going to show you how to hack wifi. Many of my friends were asking me to write a tutorial on hacking wifi, so here it is.
You probably want to hack wifi because you want to enjoy free Internet.
For me, this was my only motivation to hack into someone’s wifi. This was the only reason for me at least.
I don’t know about you… but I guess you too want to enjoy free Internet.
So… here is the guide which will show you how to hack wifi step by step. I wrote this tutorial in such a way that every beginner will easily be able to crack any wifi. This is a step by step approach into hacking wifi.
RECOMMENDED: Ethical Hacking For Beginners
RECOMMENDED: Basic Linux Commands For Beginners
In this tutorial I’mg going to use the hackers OS.
Yes… the hackers OS which is Kali Linux.
I’m quite sure that you already know about Kali Linux and what it is used for. It is the most used hacking Operating System. The other one is Parrot OS. Which is also quite popular.
Also as a side note, I have written a tutorial on how to install parrot os, you can read it if you want to.
But for this tutorial, I’m going to use Kali Linux for wifi hacking. I’m running a live version of kali which is very cool.
Just in case you don’t know, live version means you are directly running the OS without having to install it on your disk.
Now, let us have a look at the types of WiFi Networks that you can find in your neighborhood.
1. Open Networks (You gotta be kidding me)
These types of networks don’t have any password to them. Anybody can connect to wifi a network that is open. I’m pretty much sure that nowadays you won’t find any wireless network with an open router configuration. If you have found one then you are very lucky.
2. Mac Filtered (Ummm… Not so secure)
Some people use mac filtering for their wifi security. In this type of wifi security, a person uses a whitelist to allow some devices, based on mac address to connect. Or a person can use a blacklist to block specific mac addresses that are not able to connect to the wireless network. This type of security is very easy to set up and does not requires much effort.
3. WEP (Easily hackable)
The WEP stands for Wired Equivalent Privacy. Wifi networks using WEP security are the easiest target for hackers because it has many vulnerabilities. So if you see a wifi network that is based on WEP security that you can easily hack that network. This security standard is not used by routers anymore. In the modern wireless routers, you won’t be able to find WEP option.
4. WPA (This person knows something about security)
This is the next version of WEP security. It stands for Wi-Fi Protected Access. It is somewhat better than WEP but not completely secure.
5. WPA2 (Pretty secure)
The WPA2 is very secure and can’t be hacked easily. Wifi networks using WPA2 security are considered as secure. But you surely can hack a WPA2 enabled wifi network but it will require more time.
READ: How To Hack Instagram
READ: Best Free Proxy Sites
How To Hack WiFi Passwords WPA & WPA2
Anyways, enough talking let’s jump right into hacking wifi networks.
But before you go ahead and hack your neighbor’s wifi, let me warn you! And here is a quick disclaimer for you.
So let’s start.
Now, if you want to hack wifi, you first need to discover all wifi networks around you. You’ll also need to get the information about the wifi networks that are within your wireless card range.
Of course, you can have a look at all the wireless networks by clicking on the connect wifi icon.
But this is not much help. You need to gather more information about the wireless network that you want to hack.
So, to do this you’ll need to change your wifi card to monitor mode. By default, it is in managed mode.
It is not a complex process, just follow the following simple steps:
Step 1: Find your wireless card name.
Simply run the command–iwconfig wlan0
You can see that the mine wireless card is named wlan0 and it is running in managed mode. To find your wireless card name simply run the command–iwconfig
Step 2: Run the following series of commands.
Also remember, if you are running these commands and not seeing any error then the commands are executing successfully.
Don’t think that if you are not getting any output, then the commands are not executing.
ifconfig wlan0 down
This command will turn off your wireless card. You need to run this command to make sure, you don’t have any error while trying to change the wifi card to monitor mode. Once you have turned off your wifi card run the next command.
iwconfig wlan0 mode monitor
Now, this is the command which will turn the mode of your wireless card to monitor mode.
ifconfig wlan0 up
Once you have changed the mode to monitor mode, you’ll need to turn on the wifi card.
That’s it, now you are in monitor mode and you can easily sniff packets from the wireless networks around you.
Just to make sure, perform the optional step 3. Hack wpa2 wifi password.
Step 3: Check if you are in monitor mode.
Again run the command–iwconfig wlan0 and check the mode part. If it’s written monitor in front of it, you are good to go.
Run the command–airodump-ng wlan0 to see all the wifi networks around you.
Now, you’ll be able to see all the networks within your wifi range. You are able to see these network only because you’ve turned the wifi to monitor mode.
Now, you have successfully discovered information about the wireless networks around you. Let’s move onto the real stuff now.
In this wifi hacking tutorial, our primary focus is on hacking WPA and wpa2 wifi networks.
Because these are the two widely used wifi encryption techniques, the focus of this tutorial will also be on these encryption types. Since these are the most used encryption techniques, you’ll be able to hack the majority of wifi networks around you.
So to hack WPA and wpa2 wifi networks, you need to capture a handshake packet from the wifi network that you are trying to hack.
Think a handshake packet like a request which is sent to the wireless router every time a new client connects to it. This client needs to have all the credentials like a password in order to connect to the router.
So our first step is to capture the handshake packet. But remember, we can only capture this handshake only when a new client connects to the router.
Step 1: Capture the handshake packet.
So let’s first have a look at all the networks available.
Simply type airodump-ng wlan0
Now it will list all the wifi networks within your wifi card range. You can see I have only one access point available within my wireless card range.
- The first column BSSID is the MAC address of the access point (means our router).
- CH stands for the channel, it is the channel which the router is using to transfer the signals.
- ENC stands for encryption and it tells the type of encryption a router is using. In my case, it is WPA encryption.
- At last ESSID is the actual name of the wifi network.
So now you have some understanding of a few of the important columns. Let’s work now to hack this wifi network.
Run the above command and look for the wifi network which you are trying to hack.
So here, I’ve set up a network named hackingpress.com. This access point is going to be my target. You find your’s and follow each of the steps that I implement on this wifi network.
First, I will gather more information about this single wifi network, I will use the following command–
airodump-ng –bssid [bssid] –channel [channel] –write [filename] [interface]
Tanki online hack download mac. This tool will work on your Mac, all latest versions are supported.
This command will look like this in my situation:
The final command in your situation will be different. So make sure you run the command by supplying it the correct information. Otherwise, it will not work.
So once running this command, I’ll have all the details of this wifi network.
As you can see, there are two blocks in the image above. The first is listing all the information about the wifi network that I selected above.
And…
…the second block here is giving information about the devices that are connected to selected wifi network.
So…
…you can see, only one device is connected to this wifi network. Also, keep in mind I’m doing all this to capture the handshake. You also need to capture the handshake packet in your case.
But remember, what I said earlier…
…we can only capture a handshake only when a new device connects to the network.
Now you might be thinking that I’ll have to wait for a new device to connect to the network in order to get the handshake packet.
But, I got a little trick. I can disconnect this connected device from the wifi network using a simple command. Once the device is disconnected it will automatically try to connect to the network again. That is when a handshake packet will be captured.
I’ll simply run the command–
aireplay-ng –deauth [no. of packets] –a [MAC address of router] –c [MAC address of the device connected to the wifi]
The command will look like this:
Now, once I run the command the aireplay-ng program will send 4 deauthentication packets to the client device. This will make the client disconnect and reconnect to the wifi network and boom… I have now got the handshake packet.
A huge chunk of work is done now.
Step 2: Create a wordlist file
The next step is to create a wordlist file. The wordlist file will be used in the next step to crack the WPA password.
With crunch, we will create all the combinations of the letters that we think is in the wifi password.
For example, let’s say I know that this wifi network has a password which contains characters abc12345, but don’t know in which order. Also, I know the password is 8 characters long.
Now, one way is that I can try all the possible combination of these characters to connect to the wifi network.
The other way is that I’ll use the crunch utility to create all the possible combinations of these characters which have a length of 8. I’ll use this list against the handshake packet that I captured earlier.
I hope, you got the idea why we are using the crunch software.
Here is the basic syntax of the crunch that we are going to use:
crunch [min] [max] [characterset] -o [output filename]
Now I’ll create a wordlist file which has characters abc12345. The min and maximum length of the password will be 8 which will be stored in a file name my-wordlist in my case.
You can name it anything.
Once the wordlist is ready. We just need to crack the wifi password.
Step 3: Actually hacking the WiFi
We’ll use aircrack-ng to hack the wifi password.
Here is the syntax of the aircrack-ng command–
aircrack-ng [handshake-file] -w [wordlist]
Installing mac os sierra on older mac. You do not need the patch tool.You will need a USB drive 8 GB or larger and, which is linked on his page.
In my case the command will look like this:
After supplying the handshake file and the wordlist file to the command hit enter, it will start the cracking process.
Wireshark Hack Wifi
The aircrack-ng uses a special technique to check each wifi password stored in the wordlist file against the captured handshake. Once a match is found it will tell you the wifi key which can be used to connect to the network.
Now, we have successfully hacked the wifi network. The key found is abc12345, which is correct. Once you have found the key for your desired WiFi network, you can use to connect to it.
Using Wireshark To Find Hackers
Rundown: How To Hack WiFi Passwords WPA & WPA2
READ: How To Make A Windows PC Restart Forever
READ: Google Dinosaur Game Hacks
So this was all about how to hack wifi using Kali Linux. As you can see the process of hacking wifi is very simple. You just have to follow some series of commands to hack any wifi network.
Using Wireshark Wifi
With the method above you can hack any WiFi network of encryption type WPA or WPA2. In the coming days I’ll be updating this post regularly to give you more methods on hacking wifi, so make sure you bookmark this page.
I hope this post was helpful for you!
Wireshark Hacking Tool
If you have any doubts and queries, please leave a comment below. I’ll love to hear from you!