On February 15th, newly-created Fediverse accounts started posting spam messages from various instances, sending invites to a Discord server for a Japanese troll organization. This spam was widespread across the Fediverse. The posts frame ap12 from “KuronekoServer” as the culprit behind the operation.
Looking at their spam content (in Japanese)
hypothetically, what stops a spam group from creating their own instance to register accounts on, or several such? It’d get defederated quickly once the attack got going, sure, but it would take time for this to get done, and in the meantime the spam gets in