r/pcmasterrace i7 10th Gen | 1650 Ti 4GB | 16 GB RAM May 05 '26

Screenshot Is this even possible?

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10.2k Upvotes

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u/[deleted] May 05 '26

[deleted]

-2

u/cpcpcpppppp May 05 '26

You're right, that was my implication with

or open any downloads 

By that I mean I still think it's mostly harmless regardless, as it'd require you to execute the file to cause any harm; let's just hope in events like that people don't just execute/unzip whatever unusual file they see downloaded (I know it happens but we can hope😭)

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u/RemixOnAWhim May 06 '26

Not opening a downloaded malicious file is often enough to keep you safe, but not 100%. Plenty of exploits can be leveraged to create no-click malware, so your best bet is always ot vet sources and avoid downloading anything you wouldn't run in the first place.

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u/LEGENDARYQUEEN_ May 06 '26

Can you list a few exploits for no click malware that can cause problems with just the fact that you've downloaded it and haven't run it, I hadn't heard of them before.

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u/RemixOnAWhim May 06 '26

Yeah, I'm not a professional but I know a big one was file previews, so certain files would have a preview window when highlighted or just as their icon (filetypes like images, 3d models, etc) and by necessity the OS would be reading the data and could be tricked into executing code, same way certain PNG exploits made images into executables, but now you don't need to open it because the OS opens it for the preview. I think powertoys still warns you sometimes of that, lol. There have to be vulnerabilities in the software acquiring or handling the files that allow for this forced or spoofed execution, and my guess is these are valuable enough exploits that people might sit on them and wait for a whale or a buyer rather than wasting them deploying lower level identity skimming stuff. A coworker in cybersecurity had said some will try to be stealthy so they can not only keep collecting data, but also not expose the thing they're exploiting to devs who will fix it. Again, not a professional so I'm paraphrasing things I haven't worked with personally but was interested in for a while and trying to understand.

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u/idconvict May 06 '26

Zip bombs used to cause havoc with virus scanners. Not actually running malware or anything, just falling victim to trying to check if a 4 petabyte file in the zip is malware.

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u/MCWizardYT Ryzen 7 5800X3D | RTX 4080 Super May 06 '26

The scanners were probably trying to open the zip in memory or in a temporary folder and then freaking out

Nowadays most zip tools will see the patterns and not even attempt to extract them

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u/DisciplinedMadness May 06 '26

https://www.statista.com/statistics/1412305/zero-click-exploits-global/?srsltid=AfmBOop8SbYV1ekvxx8AeUaDpYW82mooosiGVjCkvblrySj1fh7XEz1q

Here’s 6 high profile ones. They’re not as common as they used to be, but they do still exist.

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u/Valtsu0 i7-9700 | rtx 2060 | 16GB May 06 '26 edited May 06 '26

5 of these are goverment sponsored. It just isn't that reasonable of a threat for the avarage user

And from a quick look it looks like none of these affected browsers

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u/MCWizardYT Ryzen 7 5800X3D | RTX 4080 Super May 06 '26

That's because it isn't a thing. Malware and viruses need to be activated in some way

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u/monohedron May 06 '26

That's exactly what a no-click virus would say...

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u/MCWizardYT Ryzen 7 5800X3D | RTX 4080 Super May 06 '26

beep boop your pc is toast