Everything defenders do is public, which means threat actors can look us up in how we’re detecting them and adapt their techniques. The bad news is that they learn how to evade us. The good news is that since I’m a former latchkey kid who grew up in the 80s with a short attention span, there is always something new to research. Donald “Mac” MacCarthy from Open Source Context joins us to talk about how he sees threat actors changing using passive DNS and what we can do about it.