New inference rule for to leverage diamond model

[nino-filigran]

Use case

To populate data for the diamond model. Namely, "Last used IP addresses" and "Last used domains". I want to do this automatically when a connector creates Observable <--(based on)-- Indicator --(indicates)--> Intrusion Set relationship, so that we add a link observable -- related -> intrusion set & the observable to be taken into account.

Current Workaround

Proposed Solution

Additional Information

If the feature request is approved, would you be willing to submit a PR?

Yes / No (Help can be provided if you need assistance submitting a PR)