Iâve started resuming work on the Incident object recently, and thought it would be a good candidate to test out extensions for a new SDO. Iâve attached a single sample of it with the extension that defines it along with the schema since I havenât been able to get it up to GitHub.
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From what I can tell it works well for creating new SDOs, but for extended them I do prefer option #1 as a consumer to option #2 as it means a shallower parse is permitted. I understand the risk of errors, but tracking down sub-properties of potentially variable UUIDs just feels like it will cause all extra grief on the consumer side for non-Internet connected systems.
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//SIGNED//
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Jeffrey Mates, Civ DC3/TSD
Computer Scientist
Technical Solutions Development
410-694-4335
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From: cti@lists.oasis-open.org <cti@lists.oasis-open.org> On Behalf Of Rich Piazza
Sent: Monday, October 19, 2020 3:37 PM
To: cti@lists.oasis-open.org
Subject: [Non-DoD Source] [cti] Another STIX 2.1 Extension exampleÂ
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As part of the MITRE CTI repository (Caution-https://github.com/mitre/ctiÂ<ÂCaution-https://github.com/mitre/ctiÂ>Â), we expressed all of the CAPEC attack patterns using STIX.
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I converted one of the attack patterns (CAPEC-66: SQL Injection) from using custom properties to using property-extensions.Â
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As in other examples that people have posted â adding properties seems pretty straightforward. Maybe expressing a new object (SDO, SCO, SRO) using the new extension facility is an example someone could share to make sure it doesnât have any gotchas.
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Using the schema from the Extension Definition object for validation might be something more interesting to explore.
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ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Rich
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Rich Piazza
Lead Cyber Security Engineer
The MITRE Corporation
781-271-3760
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