get https://www.virustotal.com/api/v3/collections//relationships/
Special privileges required
Threat Actors and Campaigns are only available to users with the Google Threat Intelligence (Google TI) Enterprise or Enterprise Plus licenses.
This endpoint is the same as /collections/{id}/{relationship} except it returns just the related object's descriptor instead of returning all attributes.
Available relationships are described in the Threat Actor, Campaign, Malware Family, Software or Toolkit and IoC Collection objects documentation.