Question

A detection engineer maintains three separate YARA-L single-event rules that each fire on the same underlying PowerShell download-cradle behavior, differentiated only by minor command-line variations. Analysts complain that a single malicious execution generates three near-identical alerts, causing triage confusion and duplicated case work. The engineer wants to consolidate detection logic while preserving the ability to report on which specific variant matched. Which approach best addresses this without losing variant-level fidelity?

Accepted Answer

Merge the three rules into one rule using an OR-combined regex in the event section, and use an outcome variable to capture and label which command-line variant matched.

Answer

Keep the three rules separate but set each rule's alerting to false so only detections are generated, eliminating duplicate alerts.

Answer

Convert the three rules into a single multi-event rule with a match window, joining the three variant events on the same host to require all three to occur.

Answer

Delete two of the three rules and rely on the most specific remaining rule to catch the behavior.