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Passive DNS Logs: The Pulse of the Network

  • Tuesday, March 8, 2016 - 10:00 am Singapore / 1:00 pm Melbourne
  • Philip Hagen, SANS Certified Instructor
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Overview

Although some network protocols are more commonly seen than others, the staggering reality is that there are thousands of protocols an analyst may encounter during the course of an investigation, incident response, or threat hunting program. Therefore, network forensic analysts will recognize great efficiencies by reviewing those which provide insight to many other protocols. A prime example is the Domain Name System, or DNS. By logging all DNS queries and their responses, it's possible to characterize the nature of nearly every other protocol - even many undocumented, custom, and proprietary ones. This webcast will review several different methods one can use to log DNS activity or extract it from existing evidence, as well as analytic cases where it can provide decisive value by itself or as clarifying evidence in support of NetFlow and logs.

Speaker Bio

Philip Hagen

Phil Hagen is the course lead and author of FOR572, Advanced Network Forensics and Analysis, a course that provides a hands-on curriculum on the skills necessary to perform investigations of network-based incidents, where the hard drives or memory of compromised systems are often missing. He is also a DFIR Strategist at Red Canary. Phil started his career as part of a specialization within the computer science department at the U.S. Air Force Academy, where he focused on network security and was an inaugural member of the computer security extracurricular group. He served in the U.S. Air Force as a communications officer at Beale AFB and the Pentagon, and then in 2003 Phil moved over to a position with a government contractor, providing technical services for various IT and information security projects. Now 18 years later, Phil's work has spanned the full life cycle of attacks--tool development, deployment, operational and investigative aftermath--giving him a rare opportunity to provide deep insight into the artifacts left behind. Phil has covered deep technical tasks, management of an entire computer forensic services portfolio and executive responsibilities. He's supported systems that demanded 24x7x365 functionality, managed a team of 85 computer forensic professionals in the national security sector, and provided forensic consulting services for law enforcement, government, and commercial clients. Phil also spends time developing and maintaining the SOF-ELK distribution. SOF-ELK is a virtual appliance that is pre-configured with the ELK stack (Elasticsearch, Logstash, and Kibana), and it is provided as a free tool to help the DFIR Community boost case efficiency and effectiveness. Phil is a mentor and teacher at heart, one of his biggest source of professional pride.

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