OT SIEM: From Logs to Process Evidence
Connect industrial actions, telemetry and detections so analysts can explain what changed.
Collecting OT logs is a starting point. The next question is whether your SOC can explain what changed in the industrial process and show the evidence behind that explanation.
Start with what you can observe
PLC, HMI, SCADA, engineering workstations, remote access, identity systems and network monitoring can all contribute evidence. An asset on the inventory does not mean it produces useful logs. Some devices provide events; others need network telemetry to make their activity visible.
Check the available sources before designing the detection.
Connect the evidence
Collectors, agents, APIs and Syslog bring events into the pipeline. Parsing and normalization make them searchable. Asset, user and process context make them useful.
An engineer may connect through remote access, sign into a workstation and change a controller configuration. Evidence for that sequence can sit in several systems. The SIEM should help the analyst connect the actions and identify missing visibility.
A successful login does not establish that maintenance was authorized. A configuration event does not establish its process impact.
Test the whole chain
Generate a known action in a controlled lab. Check what was recorded, run the detection and investigate the result.
The analyst should be able to identify the affected asset, account and access path, explain the observed change, and distinguish evidence from assumptions.
Action → telemetry → detection → investigation → evidence.
Labshock provides industrial environments where teams can examine that chain against a running simulated process and connected security tools.
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