This file is large, at 858MB, but not unmanageably so. To do that, we could use the tool crunch: crunch 8 8 0123456789 > numbers Therefore we could generate a wordlist of all possible 8 character passcodes and we would be able to crack every network passcode for these devices, made by this manufacturer. In this instance the TestNetwork in use here comes preconfigured from the manufacturer with a weak key – each device is configured from the manufacturer with an 8 digit passcode. Once the handshake has been captured it can be cracked using aircrack-ng and a dictionary. This will cause the client to disassociate from the network and will generally reconnect – allowing a handshake to be captured. Aireplay-ng can be used for this, as: aireplay-ng -0 1 -e TestNetwork wlan0 -c F8:4E:73:F0:1F:83 However, if a client was already connected and no handshake captured we could force a handshake by sending a disassociation request to the target client. In the above screenshot you can see that a WPA handshake has been captured already, as a client (F8:4E:73:F0:1F:83) has just connected. Finally, -w will write the captured data to a file to allow cracking, such as: airodump-ng -c 11 -essid TestNetwork -w TestWPAĪirodump-ng is monitoring a network and has captured a WPA handshake. c will select the channel (without it, channel hopping is the default), –bssid or –essid will monitor a single nework, or without this all networks will be monitored. Once monitoring you can check which networks are available, and record any WPA handshakes for later brute-forcing with Airodump-ng. Monitor mode can be entered with: airmon-ng start wlan0Īirmon-ng is used to place the card into monitor mode Now you can place the wireless card into monitor mode, here our card is named wlan0, you can check the name of your card with ifconfig. NetworkManager is likely to interfere with these tests, so you can stop that with these commands: service NetworkManager stop Drivers to support injection can be installed on Kali Linux with the following steps: git clone We’ll be using a AWUS036ACH, with a Realtek RTL8812au. We’re going to be using aircrack-ng and you’re going to need a compatible wireless card. Setting up the tools for these attacks is very similar to our previous post. The first thing to note is that the key-length for WPA is between 8 characters and 63 characters – this is important when building brute-force word lists. This isn’t the only weakness of these protocols – but weak keys are common. Now it’s time to take a look at WPA and WPA2 bruteforcing.
We previously spoke about WiFi security and how utterly broken WEP is. Author: HollyGraceful Published: 19 October 2020 Last Updated: 03 November 2022
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