Don't Miss: MacBook Air, Surface Pro 7, or $350 Off with SANS Online Training - Register Now!

Reading Room

Subscribe to SANS Newsletters

Join the SANS Community to receive the latest curated cyber security news, vulnerabilities and mitigations, training opportunities, and our webcast schedule.

Malicious Code

Featuring 115 Papers as of May 13, 2019

  • Using Splunk to Detect DNS Tunneling Graduate Student Research
    by Steve Jaworski - June 1, 2016 

    DNS tunneling is a method to bypass security controls and exfiltrate data from a targeted organization. Choose any endpoint on your organization's network, using nslookup, perform an A record lookup for If it resolves with the site's IP address, that endpoint is susceptible to DNS Tunneling. Logging DNS transactions from different sources such as network taps and the DNS servers themselves can generate large volumes of data to investigate. Using Splunk can help ingest the large volume of log data and mine the information to determine what malicious actors may be using DNS tunneling techniques on the target organizations network. This paper will guide the reader in building a lab network to test and understand different DNS tunneling tools. Then use Splunk and Splunk Stream to collect the data and detect the DNS tunneling techniques. The reader will be able apply to what they learn to any enterprise network.

  • View All Malicious Code Papers

Most of the computer security white papers in the Reading Room have been written by students seeking GIAC certification to fulfill part of their certification requirements and are provided by SANS as a resource to benefit the security community at large. SANS attempts to ensure the accuracy of information, but papers are published "as is". Errors or inconsistencies may exist or may be introduced over time as material becomes dated. If you suspect a serious error, please contact

All papers are copyrighted. No re-posting or distribution of papers is permitted. Graduate Student Research - This paper was created by a SANS Technology Institute student as part of the graduate program curriculum.