This program is a tool written in Python to recover the pre-shared key of a WPA2 WiFi network without any de-authentication or requiring any clients to be on the network.
It targets the weakness of certain access points advertising the PMKID value in EAPOL message 1.
python pmkidcracker.py -s <SSID> -ap <APMAC> -c <CLIENTMAC> -p <PMKID> -w <WORDLIST> -t <THREADS(Optional)>
The two main formulas to obtain a PMKID are as follows:
This is just for understanding, both are already implemented in find_pw_chunk
and calculate_pmkid
.
Below are the steps to obtain the PMKID manually by inspecting the packets in WireShark.
*You may use Hcxtools or Bettercap to quickly obtain the PMKID without the below steps. The manual way is for understanding.
To obtain the PMKID manually from wireshark, put your wireless antenna in monitor mode, start capturing all packets with airodump-ng or similar tools. Then connect to the AP using an invalid password to capture the EAPOL 1 handshake message. Follow the next 3 steps to obtain the fields needed for the arguments.
wlan_rsna_eapol.keydes.msgnr == 1
in WireShark to display only EAPOL message 1 packets.If access point is vulnerable, you should see the PMKID value like the below screenshot:
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