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DNS logs are one of the most powerful threat hunting resources, but encryption is rapidly changing that equation.
Key DNS threat hunting techniques include detecting DNS tunneling and Domain Generation Algorithms (DGAs). It used to be simple(r): log DNS requests and responses on DNS forwarders, or sniff and analyze via tools like Zeek.
DNS over TLS (DoT) and DNS over HTTPS (DoH) are disrupting the status quo: where does that leave network defenders? This talk will analyze the current state of DNS monitoring, and provide actionable steps for detecting malice on your network via DNS.
Speaker Bio:
Certified SANS instructor Eric Conrad's career began in 1991 as a Unix sysadmin for a small oceanographic communications company. He gained experience in a variety of industries, including research, education, power, Internet, and healthcare, and has worked with companies such as Mitsubishi Electric Research Labs, Boston University, The Open Group, Navipath, and Caritas Christi Health Care. He is now an independent information security consultant focusing on intrusion detection, incident handling, and penetration testing. He is a graduate of the SANS Technology Institute with a Master of Science degree in information security engineering. In addition to the CISSP, he holds the prestigious GIAC Security Expert (GSE) certification as well as the GIAC GPEN, GCIH, GCIA, GCFA, GAWN, and GSEC certifications. He is a contributing author to SANS HIPAA Security Implementation. Eric also blogs about information security at http://www.ericconrad.com.
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