elastic / detection-rules

https://www.elastic.co/guide/en/security/current/detection-engine-overview.html
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[Rule Tuning] Suspicious PrintSpooler Service Executable File Creation #3964

Closed w0rk3r closed 2 months ago

w0rk3r commented 2 months ago

Summary

Converts the rule to the new_terms rule type, uses query DSL to exclude noisy patterns, and to include the system32 & syswow64 folders.

The rule is very noisy and the majority of the hits are FPs, so this aims to reduce the volume and improve the FP x TP rate.

image

protectionsmachine commented 2 months ago

Rule: Tuning - Guidelines

These guidelines serve as a reminder set of considerations when tuning an existing rule.

Documentation and Context

Rule Metadata Checks

Testing and Validation