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03. 10. 2025 Daniel Degasperi Blue Team, Log-SIEM, SEC4U

From Noisy Detections to Precision: Moving from KQL to ESQL in Elastic Security

Introduction In modern SOC environments, detection rules are the cornerstone of identifying malicious activity. However, the effectiveness of a rule depends not only on what it looks for but also on how precisely it defines suspicious behavior. Many analysts have experienced the pain of rules that are “noisy” – generating countless false positives (FPs) that…

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12. 12. 2024 Reinhold Trocker Log Management, Log-SIEM

Sample osquery Investigations for a Security Incident

osquery

Note: This description of a security analyst’s daily routine is fictitious. However, the osquery examples have been tested and can therefore be used as a template for your own research. 1. Alarm Detection Today started with a high-severity alarm from our Elastic Security system. The alert indicated suspicious activity on host HOST-1234, suggesting potential malware execution. The…

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