To crack the password, you need to extract the following fields from the "Response" packet:
PPTP MS-CHAPv2 hashes can be cracked using tools like Hashcat or John the Ripper . vpn-jantit-pptp
The challenge provides a PCAP file containing traffic from a PPTP VPN connection. PPTP is an older VPN protocol known for security vulnerabilities, particularly in its authentication phase, which often uses MS-CHAPv2. Step-by-Step Analysis To crack the password, you need to extract
: The 24-byte hashed response sent by the client. To crack the password
: MS-CHAPv2 relies on the DES algorithm, which is susceptible to brute-force attacks.
Open the file in Wireshark. Filter the traffic using pptp or gre (Generic Routing Encapsulation). You will see the control channel setup (TCP port 1723) followed by GRE packets carrying the encapsulated PPP data.