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


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:

moxie0-chapcrack.zip

Or read more here.

Posted in: Cryptography, Exploits/Vulnerabilities, Hacking Tools


Latest Posts:


APT-Hunter - Threat Hunting Tool via Windows Event Log APT-Hunter – Threat Hunting Tool via Windows Event Log
APT-Hunter is a threat hunting tool for windows event logs made from the perspective of the purple team mindset to provide detection for APT movements hidden in the sea of windows event logs.
GitLab Watchman - Audit Gitlab For Sensitive Data & Credentials GitLab Watchman – Audit Gitlab For Sensitive Data & Credentials
GitLab Watchman is an app that uses the GitLab API to audit GitLab for sensitive data and credentials exposed internally, this includes code, commits, wikis etc
GKE Auditor - Detect Google Kubernetes Engine Misconfigurations GKE Auditor – Detect Google Kubernetes Engine Misconfigurations
GKE Auditor is a Java-based tool to detect Google Kubernetes Engine misconfigurations, it aims to help security & dev teams streamline the configuration process
zANTI - Android Wireless Hacking Tool Free Download zANTI – Android Wireless Hacking Tool Free Download
zANTI is an Android Wireless Hacking Tool that functions as a mobile penetration testing toolkit that lets you assess the risk level of a network using mobile.
HELK - Open Source Threat Hunting Platform HELK – Open Source Threat Hunting Platform
The Hunting ELK or simply the HELK is an Open-Source Threat Hunting Platform with advanced analytics capabilities such as SQL declarative language, graphing etc
trape - OSINT Analysis Tool For People Tracking Trape – OSINT Analysis Tool For People Tracking
Trape is an OSINT analysis tool, which allows people to track and execute intelligent social engineering attacks in real-time.


Comments are closed.