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“Fractureiser” malware in popular Minecraft mods and modpacks

prismlauncher.org

21–30 of 106 posts

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#21

client.jar searches the entire filesystem When HDDs used to be the norm, that would raise an obvious audiovisual signal that something isn't right. Unfortunately with almost everyone using SSDs these days, and the loss of activity indicators[1] on a lot of machines, it would be barely noticeable. [1] I suspect that it's also in the interests of "officially sanctioned" malware to hide its presence.

For a modern OS a some inductor LED for drive activity would just be constantly flashing at different rates. Something is always writing to a log somewhere, just on the OS itself. To actually be useful more information would need to be carried: different rates (by colour, brightness, or a simple bar of variable length), an indicator per drive if multiple, ...

This is not true at all. I'm running Linux and I am alerted by the HDD LED when it lights up and then I realize that I left the BitTorrent client running or something like that. But in regular browsing and using the device, the LED is mostly off, blinking once every 10 seconds or so.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#22
post #14

It seems baffling that we have this massive community making mods with highly insecure raw java code, and somehow nobody thought of figuring out how to sandbox the stuff.

I'm sure people have thought about it, it's just hard, annoying, and asking a lot of mostly unpaid OSS contributors. Many mod developers are high school / college aged.

Sandboxing Java code running in process requires ugly and obscure security APIs and restricts you to having to have a common modding API (Forge). Many mods use bytecode patching and would be broken completely.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#23

client.jar searches the entire filesystem When HDDs used to be the norm, that would raise an obvious audiovisual signal that something isn't right. Unfortunately with almost everyone using SSDs these days, and the loss of activity indicators[1] on a lot of machines, it would be barely noticeable. [1] I suspect that it's also in the interests of "officially sanctioned" malware to hide its presence.

For a modern OS a some inductor LED for drive activity would just be constantly flashing at different rates. Something is always writing to a log somewhere, just on the OS itself. To actually be useful more information would need to be carried: different rates (by colour, brightness, or a simple bar of variable length), an indicator per drive if multiple, ...

Mine stays almost completely quiet most of the time, because I've trimmed the stuff running in the background to an absolute minimum.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#25
post #11
post #5

files-8ie,pages,dev does not resolve and 85,217,144,130 times out, so... the malware doesn't do anything anymore?

from TFA: > Until further notice, do not use the official CurseForge launcher, or download anything from CurseForge or the Bukkit plugin repository. While the control server for this malware is currently offline, any download from CurseForge or the Bukkit plugin repository in in the last 2-3 weeks should be treated as potentially malicious. This malware is unlikely to be detected by Windows Defender or similar antima…

Why do they say it's unlikely? Surely defender/av products will soon be able to detect it? Or do they mean right now? Frustrating.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#26
post #14

It seems baffling that we have this massive community making mods with highly insecure raw java code, and somehow nobody thought of figuring out how to sandbox the stuff.

I'm sure people have thought about it, it's just hard, annoying, and asking a lot of mostly unpaid OSS contributors. Many mod developers are high school / college aged. Sandboxing Java code running in process requires ugly and obscure security APIs and restricts you to having to have a common modding API (Forge). Many mods use bytecode patching and would be broken completely.

The Linux distribution of Prism actually runs in a flatpak by default, which provides pretty OK isolation.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#27

client.jar searches the entire filesystem When HDDs used to be the norm, that would raise an obvious audiovisual signal that something isn't right. Unfortunately with almost everyone using SSDs these days, and the loss of activity indicators[1] on a lot of machines, it would be barely noticeable. [1] I suspect that it's also in the interests of "officially sanctioned" malware to hide its presence.

It's not hard to wait for some other io to occur, then issue a few requests and piggyback on the blink. I assume they're not in a big hurry.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#28
post #14

It seems baffling that we have this massive community making mods with highly insecure raw java code, and somehow nobody thought of figuring out how to sandbox the stuff.

This severely downplays how much work adversaries put into making sure that despite your best efforts, their payloads will make it through.

Re: “Fractureiser” malware in popular Minecraft mods and modpacks

#29

client.jar searches the entire filesystem When HDDs used to be the norm, that would raise an obvious audiovisual signal that something isn't right. Unfortunately with almost everyone using SSDs these days, and the loss of activity indicators[1] on a lot of machines, it would be barely noticeable. [1] I suspect that it's also in the interests of "officially sanctioned" malware to hide its presence.

My new-ish Dell XPS laptop actually does make noises; I think from the SSD due to [0]. It can indeed be quite useful for figuring out when something’s not quite right.

[0] https://superuser.com/a/1603734

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