Using the Censys API for Advanced Threat Hunting

This post introduces the Censys value-counts API and an example Censeye tool that automates extracting field/value pairs from host data, batching counts, and recursively pivoting on uncommon indicators; a Cobalt Strike case study demonstrates practical use—identifying multiple C2 servers sharing beacon watermarks and public keys, discovering encrypted payloads and tool binaries, and surfacing rare indicators (IP addresses, file hashes, JARM fingerprint) useful for threat hunting and further investigation.