Running in Circles: Uncovering the Clients of Cyberespionage Firm Circles
Bill Marczak, John Scott-Railton, Siddharth Prakash Rao, Siena Sofia Magdalena Anstis, Ronald J. Deibert · TSpace (University of Toronto) · 2020
Thanks to Rapid7 and Censys for providing research access to their data feeds. Bill Marczak’s work on this report was supported, in part, by the International Computer Science Institute and the Center for Long-Term Cyber Security at the University of California, Berkeley. The authors would like to thank Jeffrey Knockel for peer review and Stephanie Tran for research assistance. Special thanks to several other reviewers who wish to remain anonymous as well as TNG.