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submitted 4 months ago by 0nekoneko7@lemmy.world to c/linux@lemmy.ml
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[-] atzanteol@sh.itjust.works 3 points 4 months ago

Why? It's not hard. They typically hash files and look for hits against a database of known vulnerabilities.

[-] boredsquirrel@slrpnk.net 7 points 4 months ago

Yes and if viruses use something like base64 encoding or other methods, the hashes dont match anymore.

As far as I understood it, it is pretty easy to make your virus permanently un-hashable by just always changing some bits

[-] atzanteol@sh.itjust.works 2 points 4 months ago

The xz backdoor was a packaged file distributed with the standard packages though. It would be trivial to find.

[-] boredsquirrel@slrpnk.net 1 points 4 months ago

This is obviously not about this known file.

It is about "would this scanner detect a system package from the official repos opening an ssh connection"

[-] atzanteol@sh.itjust.works 1 points 4 months ago

Sorry, I was responding to:

I HIGHLY doubt that they would detect the XZ backdoor

[-] possiblylinux127@lemmy.zip 2 points 4 months ago* (last edited 4 months ago)

That doesn't work against polymorphic malware

I think the best way is to monitor calls and behavior. Doing that is a privacy nightmare

[-] atzanteol@sh.itjust.works 1 points 4 months ago

Who's talking about polymorphic malware? We were talking about the xz backdoor.

[-] possiblylinux127@lemmy.zip 1 points 4 months ago

Oh well in that case there is no chance

this post was submitted on 02 Jun 2024
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