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)

A really interesting look at the recent spam wave.

  • Admiral PatrickEnglish
    35•9 months ago

    Takeaways

    All pulled from the analysis, emphases are mine:

    • Many Fediverse instances have open sign-ups without proper limits, enabling this to even happen in the first place.
    • Open registrations should NEVER be enabled on instances without proper protections and monitoring.
    • It’s important to note that this attack doesn’t require any novel exploit, just the existence of unmonitored, un-protected instances with open registration. From what we’ve seen, these are usually smaller instances.
    • If you must have open registrations on your instance, use the proper anti-spam and anti-bot mechanisms. We also recommend blocking sign-ups using Tor IP addresses and temporary email domains.
    • @[email protected]English
      13•9 months ago

      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

      • @DoomBot5English
        10•9 months ago

        Why use your own resources when you can use someone else’s?

      • Draconic NEOEnglish
        7•9 months ago

        I don’t think really anything, it just takes more effort and they’d need to change the domain every time they get blocked. I have seen a few services hosted solely for spam and bad faith practices, though they were Mastodon, Plemora, and Kbin servers, not Lemmy.

      • @[email protected]English
        7•9 months ago

        It’s probably more expensive and inconvenient.

        Also it might only take one report for an active mod team to ban a server. How long can that take? An hour? Less? If they’re on servers that real people use, bots have to be banned one by one, so the spam can last a lot longer and reach more people.