How To Crack WPA2 WiFi Password With AirCrack-NG - WiFi Pentesting Video 2024

Summary

This video covers wireless penetration testing, specifically focusing on capturing handshakes and cracking Wi-Fi passwords using tools like Aircrack-ng. The host demonstrates how to use an external wireless card, switch it to monitor mode, and capture network traffic. Viewers learn to capture a four-way handshake, open packet data in Wireshark, and perform a dictionary attack to crack the network's password. The video is a practical guide for those interested in wireless hacking, with step-by-step instructions and useful tips for beginners.

Takeaways

• 🔌 You need an external wireless card, such as an Alpha or TP-Link, to perform wireless penetration testing.
• 🖥️ Use the command `lsusb` to ensure your wireless card is properly recognized and installed.
• 🔄 Switch the wireless card to monitor mode using the `airmon-ng start <interface>` command to capture packets.
• 📶 Monitor mode allows packet sniffing, while managed mode is for typical internet use.
• 📡 Use `airodump-ng` to capture packets from surrounding wireless networks by channel hopping.
• 🎯 To target a specific network, you need to specify the channel and use `airodump-ng` with the network's details.
• 📱 To capture a handshake, deauthenticate a client device using `aireplay-ng` to force it to reconnect and capture the traffic.
• 🖱️ The handshake data is stored in a `.pcap` file, which is crucial for conducting further attacks like dictionary or brute-force attacks.
• 🔍 You can use Wireshark to analyze the packet captures and inspect the four-way handshake messages.
• 🔐 Use the `aircrack-ng` tool to crack the captured handshake using a wordlist, which can reveal the network's password.

Q & A

What is the main topic of the video?

The video is about wireless penetration testing, specifically capturing handshakes and cracking Wi-Fi passwords using tools like Airodump-NG and Aircrack-NG.

Why is an external wireless card necessary for this process?

An external wireless card is necessary because it allows for monitor mode, which is essential for capturing packets and performing wireless attacks. Internal laptop cards usually don't support this mode.

What is monitor mode, and why is it important?

Monitor mode is a setting that allows a wireless card to listen to all network traffic on a given frequency without being connected to the network. It is important because it enables the capture of packets, which is critical for wireless hacking.

How can you check if your wireless card is in monitor mode?

You can check if your wireless card is in monitor mode by running the command 'iwconfig.' If the card is in managed mode, you can switch it to monitor mode using 'airmon-ng start' followed by the interface name.

What is Airodump-NG, and how is it used in this process?

Airodump-NG is a tool from the Aircrack-NG suite used for capturing network packets. In this process, it is used to collect information from wireless networks, including SSIDs, channels, and connected devices.

What is channel hopping, and why is it performed?

Channel hopping refers to the process of scanning different channels in quick succession to capture traffic from various networks. It is performed to find networks and devices operating on different channels.

What is a four-way handshake, and why is it important for Wi-Fi cracking?

A four-way handshake is the process by which a client and access point authenticate with each other in a WPA/WPA2 network. Capturing this handshake is crucial for attempting to crack the Wi-Fi password using dictionary or brute-force attacks.

How can a deauthentication attack help in capturing the four-way handshake?

A deauthentication attack forces a device (like a phone) to disconnect from the Wi-Fi network. When the device reconnects, a new four-way handshake is generated, which can then be captured.

What role does a wordlist play in cracking the Wi-Fi password?

A wordlist is used in a dictionary attack where the captured handshake is compared against a list of possible passwords. The correct password is found when one of the words in the list matches the hash from the handshake.

What is the final step in this Wi-Fi cracking process?

The final step is using Aircrack-NG to attempt to crack the password by comparing the captured handshake file with the wordlist. If the correct password is in the list, Aircrack-NG will reveal it.