OT Security Goes Credentials-First at the Industrial Endpoint

Detail

, argues that conventional endpoint defence built around malicious binaries and software package provenance is scanning for the wrong thing. In converged plants, attackers rarely need malware. They log in. And the credential they use to reach an engineering workstation is frequently the same one that reaches the historian, the HMI and, eventually, the PLC.

The shift lands against a hard statistical backdrop. IBM X-Force has ranked manufacturing as the most-attacked industry for multiple consecutive years, and its 2025 index found that roughly 30% of intrusions began with valid account credentials rather than malware.

The approach inverts the traditional inventory. Instead of cataloguing files and processes, it catalogues

, every credential physically discoverable on a machine , then resolves each one to the production asset it unlocks.

Critically, it also resolves reuse: every other location where that same secret appears. In OT, that lateral map is the whole ballgame.

and configuration archives, including VPN and FTP details for firmware or recipe transfers.

Endpoint security in IT was built to answer "is this file dangerous?" OT needs a different question: "what does this machine hold the keys to?" A CNC cell PC with a stored domain service account is not an endpoint risk , it is a Purdue Level 1 risk wearing a Level 3 disguise. Credentials-first tooling exists to expose that mismatch before an attacker does.