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malicious backdoor found in widely used game mod by Low Level [YouTube] (youtu.be)

submitted 5 days ago by [email protected] to c/[email protected]

17 comments fedilink hide all child comments

Invidious, an alternative YouTube client in the browser without using YouTube directly (more private): https://inv.nadeko.net/watch?v=VH_8arwuRz8

Video Description:

This is why I don't download game mods. Another backdoor has been found, this time in a popular modular for City Skylines 2 by paradox games. Checkout what happened in this video.

reddit.com/r/antivirus/comments/1gh4qp0/popular_mod_for_a_game_may_have_been_malicious_no

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[–] [email protected] 26 points 5 days ago (3 children)

Tldr: it's a crypto wallet stealer.

Always be wary of unknown code. Check comments on sites like Nexus. Run installers through virus checks.

[–] [email protected] 17 points 5 days ago (2 children)

If I understand it correctly from the reddit post, this was a popular mod, that you could get directly in-game, so probably available through the Steam Workshop or something. In that case you assume everything is fine and don't really check out, if there's something wrong.

[–] [email protected] 14 points 5 days ago (1 children)

It is a CS2 mod -- CS2 lacks Steam Workshop support. Paradox did not put it in, in favor of their own mod platform.

There was a lot of beef about the lack of workshop support, but it means it was on Paradox's platform, if anything.

[–] [email protected] 4 points 5 days ago (1 children)

Wonder if steam workshop scans for this kind of thing, or if it would have otherwise been found quicker.

[–] [email protected] 5 points 5 days ago (1 children)

This mod had some clever tricks to avoid detection from Antivir scanner. Not sure how deep and complex the Steam Workshop antivir scanner goes (if any). Hard to say if they would have found and prevented it. However, all antivir and other scanner software learned from this and now every malware using this technique could be detected instantly. At least in theory.

[–] [email protected] 3 points 4 days ago (1 children)

Steam has some basic scans, but nothing special. This kind of thing happened before, with mods and even games.

[–] [email protected] 1 points 4 days ago (1 children)

I would assume so. Did this happen in Steam Workshop?

[–] [email protected] 3 points 4 days ago (2 children)

Yes. Apparently there were enough mods like this, that someone made a list to unsubscribe from them:

https://steamcommunity.com/sharedfiles/filedetails/?id=2749608338

Also, this time it's the first Cities Skyline, I don't know of any other games, but it wouldn't surprise me.

[–] [email protected] 1 points 2 days ago

Heh, madlads :D Modern problems require modern solutions 👍

[–] [email protected] 1 points 4 days ago

There were rumours about one for rimworld but I'm not sure if it was real or on steam.

[–] [email protected] 7 points 5 days ago

Man if that's the case, that really sucks.

[–] [email protected] 5 points 5 days ago (1 children)

At least name the mod.

[–] [email protected] 2 points 5 days ago* (last edited 5 days ago) (1 children)

It was the traffic mod, and it's been patched for a while now. Edit: Wait. I'm out of date. It happened AGAIN?

[–] [email protected] 1 points 4 days ago

That post is from 10 days ago, so is probably the traffic mod?