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But his discovery of the data was pure happenstance—a surprising needle in a large haystack of DNS lookups on his screen.“I have an outlier here that connects to Russia in a strange way,” he wrote in his notes. But what he saw was a bank in Moscow that kept irregularly pinging a server registered to the Trump Organization on Fifth Avenue.Computer scientists have built a set of massive DNS databases, which provide fragmentary histories of communications flows, in part to create an archive of malware: a kind of catalog of the tricks bad actors have tried to pull, which often involve masquerading as legitimate actors.These databases can give a useful, though far from comprehensive, snapshot of traffic across the internet.
A small portion of the logs showed communication with a server belonging to Michigan-based Spectrum Health.
DNS enables our words to set in motion a chain of connections between servers, which in turn delivers the results we desire.
Before a mail server can deliver a message to another mail server, it has to look up its IP address using the DNS.
Some of the most trusted DNS specialists—an elite group of malware hunters, who work for private contractors—have access to nearly comprehensive logs of communication between servers.
They work in close concert with internet service providers, the networks through which most of us connect to the internet, and the ones that are most vulnerable to massive attacks.