My fellow penguins,

I have been pwned. What started off as weeks of smiling everytime I heard a 7-10s soundbyte of Karma Factory’s “Where Is My Mind” has now devolved into hearing dashes and dots (Morse Code) and my all-time favorite, a South Park S13: Dead Celebrities soundbyte of Ike’s Dad saying, “Ike, we are sick of you talking about ghosts!”

It’s getting old now.

I feel like these sounds should be grepable in some log somewhere, but I’m a neophyte to this. I’ve done a clean (secure wipe >> reinstall) already, the sounds returned not even a day later.

Distro is Debian Bookworm. So how do I find these soundbytes? And how do I overcome this persistence? UFW is blocking inbound connection attempts everyday, but the attacker already established a foothold.

Thank you in advance. LOLseas

  • bcovertigo@lemmy.worldEnglish
    2·
    1 day ago

    Can you record the noise and share it? Consider outlook’s recent arbitrary webdav exploit that fetched a malicious payload from the internet to run if you said it was a custom notifocation sound. That directly attacked a sound producing function and is silent.

    It’s not impossible this is an attack but it’s a very rube-goldberg scenario that leads to to suppose there is a literal noisy attacker who can persist through reimaging but can’t stop fucking up an existing sound channel.

    • LOLseas@sh.itjust.worksOPEnglish
      3·
      1 day ago

      I would love to catch the event, but it’s sporadic. I stumbled across the gnome-logs package and see concerning events such as “Warning: writing to insecure memory!” from a running service: tracker-extract-3.service. But that service, though named intimidatingly, just watches the file directory for updates/new files.

      I’m dealing with Morse Code atm and it’s a welcomed relief from the South Park or Karma Factory bytes.

      Also, I installed Ventoy on my USB drive and put a Gentoo Live iso as well as Debian, Slax, and QubesOS. I intend to reinstall (thinking of starting with Gentoo).

      Then I tried unmounting it. It hung with “device busy” for a solid 6 minutes, and finally ejected. New fear is the attacker is altering the iso files I’m putting on the drive. So I ran sha256sum -c [Gentoo.iso filename] against the SHA256 hash from gentoo.org and it completed as OK but bitched about 12 lines improperly formatted. I’m spitballing again on what to do.

      Also, how can I get Lemmy to show codecommands formatting? I use Jerboa but don’t see a code block option.

      • PoolloverNathan@programming.dev
        3·
        19 hours ago

        Don’t run sha256sum -c on your suspect file — it expects to be passed a file containing hashes and other filenames. sha256sum the iso itself instead and check by eye, or make such a hash file.

        • LOLseas@sh.itjust.worksOPEnglish
          1·
          3 hours ago

          Downloaded the Gentoo LiveUSB image again from a running Gentoo LiveUSB session, from gentoo.org and also the .iso.sha256 file. Ran ‘sha256sum’ on both files. They mismatch. Photo included.

      • rudyharrelson@lemmy.radio
        3·
        1 day ago

        Also, how can I get Lemmy to show codecommands formatting? I use Jerboa but don’t see a code block option.

        For inline code like this, wrap the text in backticks `like this`.

        For multi-line code, wrap the text in triple backticks ``` like this ```