What UEBA Actually Is
UEBA models what is normal for an entity and scores deviation. That is narrower than the marketing, and the boundary matters.
Foundations
What UEBA is, what an entity is, what a baseline actually models, and how a score is assembled. Start here if the vocabulary is new or if the difference between UEBA and correlation rules is unclear.
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Entities: Beyond Modelling Only Users
Service accounts usually outnumber humans and behave far more predictably, which makes them the higher-value population to model.
What a Baseline Actually Models
Every deployment rests on a training period nobody inspects. What it contains decides everything the system will later call normal.
Peer Grouping and Where It Fails
Comparing an entity against similar entities beats comparing it against itself, and it fails in specific, predictable ways.
How Risk Scores Are Built
A score from 0 to 100 conveys a precision that is not there. How the number is assembled, and what it can honestly be used for.
UEBA vs SIEM, XDR and DLP
The four categories overlap and vendors blur them further. What each genuinely does, and what you still need once you have one.