PPTP MS-CHAPv2 hashes can be cracked using tools like Hashcat or John the Ripper .
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 vpn-jantit-pptp
: The client sends its username and a hashed response (NT-Response). Success/Failure : Confirms if the credentials were correct. PPTP MS-CHAPv2 hashes can be cracked using tools
: Often visible in the PPP configuration or CHAP response. Peer Challenge : The 16-byte random value from the client. Step-by-Step Analysis : The client sends its username
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.
: MS-CHAPv2 relies on the DES algorithm, which is susceptible to brute-force attacks.
: The 24-byte hashed response sent by the client.