Vpn-jantit-pptp — Verified & Plus

The format for Hashcat (Mode 5500) is: $NETCHAPV2$username$challenge$response . Alternatively, use asleap specifically designed for PPTP: asleap -r capture.pcap -w wordlist.txt Use code with caution. Copied to clipboard Key Vulnerabilities

: The client sends its username and a hashed response (NT-Response). Success/Failure : Confirms if the credentials were correct.

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. vpn-jantit-pptp

: The 16-byte random value from the server.

: Often visible in the PPP configuration or CHAP response. Peer Challenge : The 16-byte random value from the client. Success/Failure : Confirms if the credentials were correct

Look for the MS-CHAPv2 authentication sequence. In Wireshark, you can filter for ppp.protocol == 0xc223 . You are looking for three specific packets: Challenge : The server sends a random nonce to the client.

: The entire authentication exchange (challenges and responses) is sent in the clear, allowing an eavesdropper to capture the data needed for offline cracking. You will see the control channel setup (TCP

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