Rohit Dhamankar's guest appearances

Rohit Dhamankar

CyberWire Daily

Black Hat Briefings, USA 2007 [Video] Presentations from the security conference.

Black Hat Briefings, USA 2007 [Audio] Presentations from the security conference.

Krishna Kurapati

Chris Palmer

Keith Jones

Mark Ryan

Bruce Schneier

Tony Sager

Mark Dowd

David Byrne

Rob King

Jennifer Granick

Robert Graham

John McDonald

Mike Perry

Robert Hansen

Jamie Butler

OwlTail

A growing number of proprietary protocols are using end-to-end encryption to avoid being detected via network-based systems performing Intrusion Detection/Prevention and Application Rate Shaping. Attackers frequently use well known ports that are open through most firewalls to tunnel commands for controlling zombie systems.  	This presentation shows that a framework is indeed possible to identify encrypted protocols or anomalous usage of well known ports. The framework relies on performing statistical analysis on protocol packets and flows, and uniquely maps each protocol in a 10-dimensional space. Clustering algorithms are applied to accurately identify a wide variety of protocols.  	This novel approach provides network and security administrators a powerful tool to use in enforcing traffic policy, even when users are actively attempting to evade these policies. An open-source implementation will be released during the presentation.

A growing number of proprietary protocols are using end-to-end encryption to avoid being detected via network-based systems performing Intrusion Detection/Prevention and Application Rate Shaping. Attackers frequently use well known ports that are open through most firewalls to tunnel commands for controlling zombie systems.<br/> <br/> 	This presentation shows that a framework is indeed possible to identify encrypted protocols or anomalous usage of well known ports. The framework relies on performing statistical analysis on protocol packets and flows, and uniquely maps each protocol in a 10-dimensional space. Clustering algorithms are applied to accurately identify a wide variety of protocols.<br/> <br/> 	This novel approach provides network and security administrators a powerful tool to use in enforcing traffic policy, even when users are actively attempting to evade these policies. An open-source implementation will be released during the presentation.

Rohit Dhamankar & Rob King: PISA: Protocol Identification via Statistical Analysis