How To Hack WPA/WPA2 Wi Fi With Kali Linux - WikiHow

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Terms of Use wikiHow is where trusted research and expert knowledge come together. Learn why people trust wikiHow How to Hack WPA/WPA2 Wi Fi with Kali Linux PDF download Download Article Co-authored by Nicole Levine, MFA Reviewed by Stan Kats

Last Updated: August 28, 2025 Fact Checked

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  • Starting Monitor Mode
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  • Logging and Cracking the Password
    • |
  • Video
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  • Q&A
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  • Tips
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  • Warnings
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This article was reviewed by Stan Kats and by wikiHow staff writer, Nicole Levine, MFA. Stan Kats is the COO and Chief Technologist for The STG IT Consulting Group in West Hollywood, California. Stan provides comprehensive technology & cybersecurity solutions to businesses through managed IT services, and for individuals through his consumer service business, Stan's Tech Garage. Stan has over 7 years of cybersecurity experience, holding senior positions in information security at General Motors, AIG, and Aramark over his career. Stan received a BA in International Relations from The University of Southern California. There are 8 references cited in this article, which can be found at the bottom of the page. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 1,495,936 times.

Want to find out if your Wi-Fi network is easy to hack? As a Kali Linux user, you have hundreds of pre-installed security auditing and penetration testing tools at your disposal. These tools are intended for ethical hacking—finding and repairing weak spots in a network—and not for illegal purposes. To find out if a WPA/SPA PSK network is susceptible to a brute-force password attack, you can use a suite of tools called aircrack-ng to hack the key. We'll show you how!

Steps

Part 1 Part 1 of 2:

Starting Monitor Mode

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  1. Step 1 Log into your Kali desktop as root. 1 Log into your Kali desktop as root. This logs you in to the desktop environment as the root user.[1]
    • If you haven't enabled root logins in Kali and are using KDE or GNOME, run sudo apt install kali-root-login at the prompt.[2] Once installed, you can set a root password by running sudo password (no username) and entering a new root password. At that point, you can log in to the desktop as root.
  2. Step 2 Plug your Wi-Fi... 2 Plug your Wi-Fi card (if needed). If you don't have a Wi-Fi card that allows monitoring (RFMON) or you're using Kali Linux in a virtual machine, you'll need to attach an external card that does.
    • In most cases, simply attaching the card to your computer will be enough to set it up. Check the instructions for your Wi-Fi card to be sure.
    • If you're not sure if your Wi-Fi card supports monitoring, it doesn't hurt to try these next few steps.
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  3. Step 3 Disconnect from Wi-Fi. 3 Disconnect from Wi-Fi. To successfully test a network, you'll want to make sure your computer is not actively connected to Wi-Fi—not even to the network you're testing.
  4. Step 4 In a terminal... 4 In a terminal window, run the airmon-ng command. This tool come with Kali Linux as a part of the aircrack-ng package, and will show you the names of the connected Wi-Fi interface(s). You'll want to take note of what you see under the "Interface" header for your card.
    • If you don't see an interface name, your Wi-Fi card doesn't support monitoring.
  5. Step 5 Run airmon-ng start wlan0 to start monitoring the network. 5 Run airmon-ng start wlan0 to start monitoring the network. If the name of your Wi-Fi interface isn't wlan0, replace that part of the command with the correct name. This gives you a new virtual interface name, which will usually be something like mon0, which you'll see next to "(monitor mode enabled)."[3]
    • If you see a message that says "Found processes that could cause trouble," run airmon-ng check kill to kill them.
  6. Step 6 Run airodump-ng mon0 to view the results. 6 Run airodump-ng mon0 to view the results. Replace mon0 with the correct virtual interface name if that's not what you saw earlier. This displays a data table for all Wi-Fi routers in range.[4]
  7. Step 7 Find the router you want to hack. 7 Find the router you want to hack. At the end of each string of text, you'll see a router name.[5]
    • Make sure the router is using WPA or WPA2 security. If you see "WPA" or "WPA2" in the "ENC" column, you can proceed.
  8. Step 8 Find the BSSID and channel number of the router. 8 Find the BSSID and channel number of the router. Now you'll want to make note of the values of the "BSSID" and "CH" fields for the router you want to hack. These pieces of information are to the left of the network's name.[6]
  9. Step 9 Monitor the network for a handshake. 9 Monitor the network for a handshake. A "handshake" occurs when an item connects to a network (e.g., when your computer connects to a router). You need to wait until a handshake occurs so you capture the data necessary to crack the password. To start monitoring, run the following command:[7]
    • airodump-ng -c number --bssid xx:xx:xx:xx:xx:xx -w /root/Desktop/ mon0
    • Replace the word number with the channel number you saw, and the xx:xx:xx:xx:xx:xx with the BSSID.
    • As long as this command stays running, you'll be monitoring for all connections and new handshakes.
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Part 2 Part 2 of 2:

Logging and Cracking the Password

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  1. Step 1 Understand what a deauth attack does. 1 Understand what a deauth attack does. A deauth attack sends deauthentication packets to the router you're trying to break into, causing uses to disconnect and requiring them to log back in.[8] When a user logs back in, you will be provided with a handshake. If you don't do a deauth attack, you might have to wait around for a long time for a handshake to complete—you'll need that handshake to crack the password.
    • If you already see a line with the tag "WPA handshake:" followed by a MAC address in the output of the airodump-ng command, skip to Step 5—you have what you need to crack the password and don't need to send deauth packets.
    • Remember—use these tools for ethical purposes only.
  2. Step 2 Wait for something to connect to the network. 2 Wait for something to connect to the network. Once you see two BSSID addresses appear next to each other—one labeled BSSID (the Wi-Fi router) and the other labeled STATION (the computer or other device)—this this means a client is connected. To force them into a handshake, you'll now send them deauth packets that kill their connection.
  3. Step 3 Open a new terminal. 3 Open a new terminal. Make sure airodump-ng is still running in original terminal window, and drag it to another place on your desktop so both terminals are visible.
  4. Step 4 Send the deauth packets. 4 Send the deauth packets. Run this command, replacing STATION BSSID with the BSSID of the client that connected to the network, and NETWORK BSSID with the router's BSSID: aireplay-ng -0 2 -a STATION BSSID -c NETWORK BSSID mon0.[9]
    • This command will send 2 deauth packets to disconnect the client from the network.[10] Don't try to send more than this—sending too many packets could prevent the client from reconnecting and generating the handshake.
    • As long as you're close enough to the target client, they'll be disconnected from the router and forced to reconnect with a handshake. If this doesn't work, move closer to the client.
    • As soon as the client reconnects, all of the information you'll need to crack the password will be available.
  5. Step 5 In the original terminal window, press Control+C to quit airodump-ng. 5 In the original terminal window, press Control+C to quit airodump-ng. This stops the dump and saves a file ending with .cap to your desktop.[11]
  6. Step 6 Decompress the rockyou.txt wordlist. 6 Decompress the rockyou.txt wordlist. To crack the password, you'll need a wordlist. Fortunately, since you're using Kali Linux, you have several already in /usr/share/wordlists.[12] The one we'll want to use is called rockyou.txt, but it's zipped up by default. To unzip it, run gzip -d /usr/share/wordlists/rockyou.txt.gz.
    • You won't be able to crack the password if it's not in the wordlist. You can always try one of the other wordlists if rockyou.txt doesn't crack the password.
  7. Step 7 Run the command to crack the password. 7 Run the command to crack the password. You'll use a tool called aircrack-ng, which come with Kali Linux, to do so. The command is aircrack-ng -a2 -b NETWORK BSSID -w /usr/share/wordlists/rockyou.txt /root/Desktop/*.cap. Replace NETWORK BSSID with the BSSID for the router.
    • Depending on the strength of the password and the speed of your CPU, this process can take anywhere from a few hours to a few days.
    • If you're cracking static WEP key network instead of a WPA/WPA2-PSK network, replace -a2 with -a1.[13]
  8. Step 8 Look for "KEY FOUND!" 8 Look for "KEY FOUND!" in the terminal window. When you see a "KEY FOUND!" heading appear, aircrack-ng has found the password, which will appear in plain text.[14]
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Community Q&A

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  • Question What is a word list, and how do I find one? Community Answer Community Answer A word list is a file with passwords in it. RockYou is a good one. Thanks! We're glad this was helpful. Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 40 Helpful 78
  • Question Where can I download Kali Linux? Community Answer Community Answer Go to kali.org. At the top of the page, there is a Download tab. Once you open that, it will pull up the list of current downloads. Thanks! We're glad this was helpful. Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 28 Helpful 44
  • Question Who created Kali Linux? Community Answer Community Answer Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing. It is maintained and funded by Offensive Security Ltd. Mati Aharoni, Devon Kearns and Raphaël Hertzog are the core developers. Thanks! We're glad this was helpful. Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 32 Helpful 84
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Video

Tips

  • Using this method to test your own Wi-Fi for weak spots before launching a server is a good way to prepare your system for similar attacks. Thanks Helpful 1 Not Helpful 5
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Warnings

  • Sending more than two death packets may cause your target computer to crash, thus arousing suspicion. Thanks Helpful 18 Not Helpful 2
  • Hacking into anyone’s Wi-Fi without permission is illegal in most countries. Only perform the above steps on a network that either belongs to you or for which you have explicit consent to test. Thanks Helpful 16 Not Helpful 4
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References

  1. ↑ https://www.kali.org/docs/general-use/enabling-root/
  2. ↑ https://www.kali.org/docs/general-use/enabling-root/
  3. ↑ https://www.aircrack-ng.org/doku.php?id=cracking_wpa
  4. ↑ https://www.aircrack-ng.org/doku.php?id=cracking_wpa
  5. ↑ https://www.kali.org/tools/aircrack-ng/
  6. ↑ https://www.kali.org/tools/aircrack-ng/
  7. ↑ https://www.aircrack-ng.org/doku.php?id=airodump-ng
  8. ↑ https://sudorealm.com/blog/deauthentication-attack-using-kali-linux
  9. ↑ https://www.aircrack-ng.org/doku.php?id=cracking_wpa
More References (5)
  1. ↑ https://www.aircrack-ng.org/doku.php?id=cracking_wpa
  2. ↑ https://www.geeksforgeeks.org/linux-unix/kali-linux-hacking-wi-fi/
  3. ↑ https://www.kali.org/tools/wordlists/
  4. ↑ https://www.aircrack-ng.org/doku.php?id=aircrack-ng
  5. ↑ https://www.geeksforgeeks.org/linux-unix/kali-linux-hacking-wi-fi/

About This Article

Stan Kats Reviewed by: Stan Kats Cybersecurity Expert This article was reviewed by Stan Kats and by wikiHow staff writer, Nicole Levine, MFA. Stan Kats is the COO and Chief Technologist for The STG IT Consulting Group in West Hollywood, California. Stan provides comprehensive technology & cybersecurity solutions to businesses through managed IT services, and for individuals through his consumer service business, Stan's Tech Garage. Stan has over 7 years of cybersecurity experience, holding senior positions in information security at General Motors, AIG, and Aramark over his career. Stan received a BA in International Relations from The University of Southern California. This article has been viewed 1,495,936 times. How helpful is this? Co-authors: 29 Updated: August 28, 2025 Views: 1,495,936 Categories: Wi Fi Article SummaryX

Log into your Kali Linux computer as root and plug a Wi-Fi card into your computer. Next, open your computer’s terminal. From here, you’ll be able to begin monitoring the network and listen to nearby routers. When you find the router you want to hack, watch it for a handshake, which will give you the code to enter the network. To learn how to use Aircrack-Ng for Non-GPU computers, keep reading! Did this summary help you?YesNo

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