Cyber Threat Indicators (2016-01-01 to 2018-12-31)

In 2016 DHS began the Automated Indicator Sharing (AIS) initiative. Through AIS, DHS enables the exchange of cyber threat indicators in a machine-readable (XML) format between the Federal Government and the private sector. Threat indicators are pieces of information like malicious IP addresses or the sender address of a phishing email (although they can also be much more complicated).

Organizations sharing indicators use the Traffic Light Protocol (TLP) (https://www.us-cert.gov/tlp) to mark the indicators for sensitivity and control how widely they can be shared. While AIS exchanges TLP White, Green, and Amber indicators, the indicators available on this site are just the ones marked TLP White from CY16 through CY18. If you are interested in receiving all the AIS indicators and in near-real-time as they are exchanged, more information on how to directly participate in AIS is available at https://www.us-cert.gov/ais.

The AIS indicators available on this site are in the Structured Threat Information Expression (STIX) version 1.1 XML format. Additional information about STIX 1.x can be found at https://stixproject.github.io/, while specific AIS field information is documented at https://www.us-cert.gov/sites/default/files/ais_files/AIS_Submission_Guidance_Appendix_A.pdf.