Missing "identity_class" field when exporting data via the export-file-stix connector

[nicocti]

Description

When exporting STIX json files from OpenCTI, "identity" entities do not contain an "identity_class" attribute to disambiguate "organization" and "individual". Re-importing such a bundle in another instance can create duplicated "identity" entities (one organization and one individual with the same name and shared alias). Then, "created_by_ref" attributes may no longer be uniquely resolved.

Environment

1. OS (where OpenCTI server runs): Docker
2. OpenCTI version: 4.5.4

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Export a Stix Bundle from an entity whose "created_by_ref" points to an individual

Expected Output

The "identity_class" attribute should be present and disambiguates "organization" and "individual".

Actual Output

The "identity_class" attribute is currently missing from exported STIX bundles.