The YARA rules and behavioral rules of Elastic Defend are shared with the community, allowing blue teams and defenders to learn from them and improve their defenses. However, we have also observed that many red team members and attackers study these rules to more easily tailor their bypass strategies. Would it be possible in the future to enable direct editing of behavioral protection rules? This would allow us to fully leverage Elastic Defend's powerful processing capabilities and extensive available fields, enabling the creation of more precise protection rules for differentiated defense or as a supplementary hunting method to enhance EDR monitoring and prevent tailored bypasses? Thank you very much!
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Welcome to the Elastic Community, and thanks for your first post!
You raise a very real challenge that many defenders face, the balance between transparency (so blue teams can learn and build stronger detections) and not giving attackers a roadmap to bypass protections.
The good news: expanding Elastic Defend to support custom YARA rules is already in our near-term roadmap. The planned approach includes:
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A new section in the Elastic Defend configuration where users can create, edit, and manage their own YARA rules.
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Ability for those custom rules to generate alerts directly from the endpoint, leveraging Elastic Defend’s detection and behavioral engine.
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Private to each organization, giving defenders flexibility to adapt protections without publicly disclosing them
Hope that helps with your concerns, we really appreciate you surfacing this, feedback like yours helps ensure we build the right capabilities for advanced defenders.
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