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Difficulty: EasyLog Analysis and SIEM Management

In Security Information and Event Management (SIEM) workflow, log data undergoes several processing stages from initial ingestion to analyst notification. Which sequence correctly places the stages of SIEM log processing in chronological order from first to last?

  1. 1Log Collection
  2. 2Log Parsing
  3. 3Log Normalization
  4. 4Event Correlation
  5. 5Alerting

Answer

The correct sequence of SIEM log processing stages is Log Collection, Log Parsing, Log Normalization, Event Correlation, and Alerting.
The standard SIEM data ingestion and processing flow follows five sequential steps: first, raw data is gathered (Log Collection); second, raw log strings are split into field elements (Log Parsing); third, parsed fields are mapped into common standard formats across all vendor logs (Log Normalization); fourth, normalized events are evaluated across time and sources against security correlation rules (Event Correlation); and finally, confirmed security incidents generate notifications for security analysts (Alerting).

Step-by-Step Solution

1
Identify the initial ingestion phase
Log Collection is identified as the mandatory first step to gather raw data from sources.
Data cannot be processed until it is ingested by the collector or agent.
2
Determine data structure and standard format conversion
Log Parsing occurs prior to Log Normalization.
Raw unstructured logs must first be parsed into individual key-value fields before those fields can be mapped to a standardized taxonomy.
3
Identify analytical logic execution and final output
Event Correlation runs on normalized logs, followed by Alerting as the final output.
Correlation rules require standardized fields across different logs to evaluate patterns, and alerts are only generated after correlation triggers a rule match.

Key Concept

SIEM Log Processing Pipeline
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Topics

Log Analysis and SIEM Management

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