08 August 2012 | 4,324 views

chapcrack – A tool for parsing and decrypting MS-CHAPv2 network handshakes.

Check Your Web Security with Acunetix

chapcrack is a tool for parsing and decrypting MS-CHAPv2 network handshakes, it was announced recently at Defcon as we read over here – Marlinspike demos MS-CHAPv2 crack.

The process is as follows:

  1. Obtain a packet capture with an MS-CHAPv2 network handshake in it (PPTP VPN or WPA2 Enterprise handshake, for instance).
  2. Use chapcrack to parse relevant credentials from the handshake (chapcrack parse -i path/to/capture.cap).
  3. Submit the CloudCracker token to www.cloudcracker.com
  4. Get your results, and decrypt the packet capture (chapcrack decrypt -i path/to/capture.cap -o output.cap -n )

If you are interested in a much more in-depth, technical explanation – you can read more here:

Divide and Conquer: Cracking MS-CHAPv2 with a 100% success rate

Using this attack they have a 100% success rate of cracking DES hashes within 23~ hours.

You can download chapcrack here:


Or read more here.


Recent in Cryptography:
- ISIS Running 24-Hour Terrorist Crypto Help-desk
- KeeFarce – Extract KeePass Passwords (2.x) From Database
- ProtonMail DDoS Attack – Sustained & Sophisticated

Related Posts:
- THC SSL DoS/DDoS Tool Released For Download
- PBNJ – Network Architecture Monitoring Tool
- wifite – Mass Wifi WEP/WPA Key Cracking Tool

Most Read in Cryptography:
- The World’s Fastest MD5 Cracker – BarsWF - 47,387 views
- Hackers Crack London Tube Oyster Card - 43,735 views
- WPA2 Vulnerability Discovered – “Hole 196” – A Flaw In GTK (Group Temporal Key) - 32,451 views

Advertise on Darknet

Comments are closed.