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submitted 2 days ago* (last edited 2 days ago) by Fubarberry@sopuli.xyz to c/steamdeck@sopuli.xyz

From the Emudeck discord:

@everyone Hey everyone, apologies for the ping but since this is deemed as critical to the security of people's devices here, I will have to. Cemu (The Wii U emulator) was recently compromised by a malicious attacker using a known developers account, this compromise took place from May 6th to May 12th, and introduces malware that is known to steal passwords, SSH keys, GitHub tokens, and likely more they are not fully aware of at this moment. We recommend anybody who is on Linux or SteamOS to go into the EmuDeck app, Manage Emulators tab, Cemu, and click Reinstall/Update, and make sure the hash of the AppImage (Located in Home/Applications, right click Cemu AppImage, go into Properties, Checksums, and Calculate the SHA256 hash) matches the non-compromised version provided by the Cemu developers, if you have used Cemu from the dates I have mentioned, and the SHA256 hash does not match what is listed, assume your system may be compromised if it was ran. If you are on Windows, MacOS, or used the Flatpak version, you are not affected by this malware. More information regarding this attack can be found here. https://rentry.org/cemu-security-psa

The specifically affected packages were:

Cemu-2.6-x86_64.AppImage

cemu-2.6-ubuntu-22.04-x64.zip

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[-] Fubarberry@sopuli.xyz 84 points 2 days ago

Also I thought this part was interesting:

Special note for Israeli users: If the malware determines that your location is Israel (it does this via locale and timezone checks) then it has a 1:6 chance that it will play a loud siren sound and run rm -rf /, essentially attempting to wipe your filesystem.

[-] SarahValentine@lemmy.blahaj.zone 79 points 2 days ago

From the river to the C:/

[-] SamueruSama@programming.dev 48 points 2 days ago* (last edited 2 days ago)

It turns out the malware doesn't work because it runs subprocess.run(["rm", "-rf", "/*"])

That will never delete anything, since there is no shell to expand the glob in /* here, so rm gets a literal /* as the path to delete 😭

[-] SpaceNoodle@lemmy.world 43 points 2 days ago

This is why you test your code, people

[-] Katana314@lemmy.world 3 points 2 days ago

Which leads to the interesting question: How do the authors of infectious, destructive viruses test their code?

[-] SpaceNoodle@lemmy.world 4 points 2 days ago

I'd set up an air-gapped test network. Could possibly set up some virtual hosts to emulate part of it, but I'd keep the whole setup isolated as a failsafe.

[-] elvith@feddit.org 4 points 2 days ago

Whew, thankfully it didn’t work on my machine!

[-] youcantreadthis@quokk.au 22 points 2 days ago

That's prettyfuvking based

[-] cheat700000007@lemmy.world 12 points 2 days ago
[-] youcantreadthis@quokk.au 7 points 2 days ago

I think I'm on team malware now

[-] mnemonicmonkeys@sh.itjust.works 7 points 2 days ago

Maybe now they'll figure out that they need to vote Netanyahu out of office for being a genocidal piece of shit

[-] nfreak@lemmy.ml 9 points 2 days ago

tbf the vast majority of that country support him and everything he stands for, so getting rid of one fascist won't change much

[-] youcantreadthis@quokk.au 2 points 2 days ago

Right they need a properly omnicidal megalomanic no mere genocide

[-] thingsiplay@lemmy.ml 4 points 2 days ago

Unless the option --no-preserve-root is given, it should not execute.

[-] elvith@feddit.org 6 points 2 days ago

Fun fact:

rm -rf / requires —no-preserve-root to work whereas rm -rf /* doesn’t.

That’s because the /* gets expanded by the shell before the command runs and it only sees the request to delete /var, /dev, /home, /usr,… recursively but not / specifically.

On another note: This line in the code doesn’t run through a shell and thus this won’t work and it just tries to delete the literal path of /* recursively - and thus fails to do any damage…

[-] tanisnikana@lemmy.world 4 points 2 days ago

That’s not malware.

That’s amazing.

[-] Fubarberry@sopuli.xyz 10 points 2 days ago

It also trys to steal passwords/keys/etc, the Russian roulette part is just extra for people in Israel.

[-] Grimy@lemmy.world 7 points 2 days ago

Is this considered Chaotic Good or Lawful Evil?

[-] youcantreadthis@quokk.au 3 points 2 days ago
[-] nfreak@lemmy.ml 3 points 2 days ago

Eh the password stealing shit definitely is but the special conditions for "israel" are hilarious (even if their code is borked and doesn't actually work)

[-] tanisnikana@lemmy.world 1 points 2 days ago

That’s fair. I hope Israel gets what’s coming to them.

this post was submitted on 13 May 2026
155 points (100.0% liked)

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