How to Hack WiFi Using a Man-in-the-Middle Attack

If you’re new to the world of network security, man-in-the-middle attacks are probably intimidating and confusing. However, this technique can be highly effective, especially when it comes to getting free WiFi access in public places. If you’re looking to hack WiFi using a man-in-the-middle attack, here’s how to do it in just three easy steps!


What is WPA2 Encryption?

WPA2 (Wi-Fi Protected Access II) is a security standard that uses AES encryption, which stands for Advanced Encryption Standard. This is just one of several types of encryption used today, but it’s one of the best. Unlike other methods that you may be familiar with, such as SSL and VPN, WPA2 is relatively new.


What Is a Man in the Middle (MITM) Attack?

One of the easiest and most common methods hackers use to access your data is known as a man-in-the-middle attack (MITM). In simplest terms, MITM attacks allow intruders access to your data by exploiting vulnerabilities in networks, devices and applications. These attacks occur when someone manages to insert themselves between you and your destination on their way through. This means that if someone were using a MITM attack against you, they could read everything passing between you and another person or website—even encrypted information.


What Are WiFi Hotspots?

When you use your smartphone, tablet, or laptop to connect to WiFi in your home or office, there’s no telling who else is using that same network. There’s also no telling whether or not you’re really connecting to your intended network—maybe it’s been compromised by an attacker called a man in the middle. If you want privacy and security when surfing online, learn how these attacks work and how you can thwart them.


The Anatomy of an HTTPS Connection

HTTPS is designed to create an encrypted connection between your computer and another server on the internet. When using HTTPS, your data (emails, passwords, images) will be encrypted during transmission and decrypted when it reaches its destination. However, if an attacker can gain access to one of these endpoints—for example by hacking into a network or by controlling one of those servers—he or she can do something called a man-in-the-middle attack that lets them see all of your communication in plain text.


Generating Your Own Certificate Authority (CA) Keys

Before you can issue certificates, you need to generate CA keys and sign your own certificates. OpenSSL makes it easy—simply run openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout cakey.pem as described above and then set your extended key usage (EKU) value to Server Authentication.


Routing Traffic Through the Rogue Access Point (AP)

In order to set up our rogue AP, we must first find one with an open network. If you’re in another country and want to take advantage of a wireless network that’s not your own, use Google Earth or simply visit Google Maps and search for a wifi map followed by your destination city and country. You'll be able to see the name and address of all the available networks near you on a map as well as their relative strength.


Setting Up Kali Linux as the Rogue AP Host Computer

Kali Linux can be installed in VirtualBox or VMware on your laptop, allowing you to serve as an access point for your man-in-the-middle attack. Kali requires that you perform a few manual steps before creating an interface for it in VirtualBox and applying relevant settings. First, open the terminal and type ifconfig eth0 down. Next, create a bridge interface by typing brctl addbr br0; when prompted enter yes. Finally, type ip link set dev eth0 master br0; this will make sure all traffic passes through the computer's network card rather than going out to the world wide web.


Hijacking Connections with ARP Spoofing

ARP spoofing is a common attack used in man-in-the-middle attacks. In ARP spoofing, an attacker sends out falsified ARP messages onto a local network. By doing so, they can redirect traffic meant for another computer onto their own machine. This gives them access to all of that data, as well as control over any programs or websites being visited. To pull off this type of attack, the hacker must have physical access to the router and know its IP address. They also need to know the MAC address of the person they want to spy on. Once the connection has been hijacked, it will continue until one party notices something is wrong and disconnects from their internet source.

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