In the DomainTools Reports, we explore various “hotspots” of malicious or abusive activity across the Internet. To date, we have analyzed such varied markers as top level domain (TLD), Whois privacy provider, domain age, patterns of registrant behavior, and more. In each case, we found patterns across our database of over 300 million (315M+ as of this writing) active domains worldwide; these patterns helped us pinpoint nefarious activity, at a large scale, in ways that are similar to methodologies used by security analysts and threat hunters at smaller scales to expose threat actor infrastructure.