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Detection Engineering and Security Operations

SIEM Architecture and Use Cases

We determine which logs your SIEM should collect and why, based on threat scenarios. We allocate the license budget to data that actually generates alerts.

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What it is

A SIEM collects logs from various systems, normalizes them, and generates alerts using correlation rules. A use case is a specific threat the SIEM is expected to detect. Each use case defines the required log source, fields, and rule. When the architecture is built from these use cases, every collected log serves a purpose.

Scope

  • Use case catalog derived from threat scenarios and mapped to MITRE ATT&CK
  • Prioritization of log sources and onboarding plan
  • Parsing, normalization, and time synchronization checks
  • Design of retention periods and hot-cold storage separation
  • Health monitoring rules to detect silent log sources
  • Definition of alert severities and escalation rules

The need

When organizations need it

  • When migrating to a new SIEM product or restructuring your current one.
  • When license costs rising with log volume exceed the detection value achieved.
  • When, after an incident, it is questioned why the SIEM did not generate an alert.

Method

How we work

  1. Use cases

    We derive use cases from threats targeting your sector and your critical processes.

  2. Source mapping

    We identify the log sources and fields required for each use case and compare them with your current state.

  3. Architecture

    We design collection, parsing, retention, and health monitoring according to your product.

  4. Rollout

    We implement priority use cases with their rules and test them on real data.

Outcome

What you have at the end

You receive a SIEM architecture that shows which use case each log source serves. Priority use cases are operational with tested rules.

Frequently asked questions

Should we send all logs to the SIEM?

No. Logs without a use case add cost but do not generate alerts. These logs can be stored in lower-cost storage for investigations.

Is this work tied to a specific SIEM product?

No. Use cases are written independently of the product. Rules and parsing settings are prepared in your product's language.

Detection Engineering and Security Operations

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Tell us briefly what you need. We will agree on the scope and timing together in the first meeting.

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