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submitted 1 year ago by drspod@lemmy.ml to c/linux@lemmy.ml

A reported Free Download Manager supply chain attack redirected Linux users to a malicious Debian package repository that installed information-stealing malware.

The malware used in this campaign establishes a reverse shell to a C2 server and installs a Bash stealer that collects user data and account credentials.

Kaspersky discovered the potential supply chain compromise case while investigating suspicious domains, finding that the campaign has been underway for over three years.

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[-] MazonnaCara89@lemmy.ml 213 points 1 year ago

Now I need to know who the hell has installed Free Download Manager on Linux.

[-] 30p87@feddit.de 44 points 1 year ago

And via a website too. That's like pushing a car. One of the main strengths of Linux are open repositories, maintained by reputable sources and checked by thousands of reputable people. Packages are checksummed and therefore unable to be switched by malicious parties. Even the AUR is arguably a safer and more regulated source. And it's actually in there.

[-] JWBananas@startrek.website 52 points 1 year ago

And via a website too

Everyone knows real admins do curl https://raw.githubusercontent.com/something/or/other/install.sh | sudo bash

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[-] xkforce@lemmy.world 21 points 1 year ago

The same people that would have given that poor nigerian prince their bank account details

[-] TrustingZebra@lemmy.one 11 points 1 year ago

It's still my favorite download manager on Windows. It often downloads file significantly faster than the download manager built into browsers. Luckily I never installed it on Linux, since I have a habit of only installing from package managers.

Do you know of a good download manager for Linux?

[-] Xirup@lemmy.dbzer0.com 8 points 1 year ago

JDownloader, XDM, FileCentipede (this one is the closest to IDM, although it uses closed source libraries), kGet, etc.

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[-] user224@lemmy.sdf.org 10 points 1 year ago

Gotta admit, it was me. I've only used a computer for short time.
I've got my first laptop 3 years ago, and that broke after just 2 months. And anyway, with AMD Athlon 64 it greatly struggled with a browser. So really I only started seriously using computer at the start of 2021, when I got another, usable laptop. And that's when I downloaded freedownloadmanager.deb. Thankfully, I didn't get that redirect, so it was a legitimate file.

[-] Hamartiogonic@sopuli.xyz 8 points 1 year ago

Oh, I know someone who adds the word “free” to various search words like “free pdf reader” or “free flash player” (happened a very long time ago). He’s also the kind of person who I can imagine having a bunch of viruses and malware on his computer.

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[-] drspod@lemmy.ml 56 points 1 year ago

The article mentions how to check for infection:

If you have installed the Linux version of the Free Download Manager between 2020 and 2022, you should check and see if the malicious version was installed.

To do this, look for the following files dropped by the malware, and if found, delete them:

/etc/cron.d/collect
/var/tmp/crond
/var/tmp/bs
[-] user224@lemmy.sdf.org 7 points 1 year ago

Also you can check the .deb file's postinst script. If it looks like shown here, no bueno.

[-] mexicancartel@lemmy.dbzer0.com 39 points 1 year ago

"Non-free download manager"

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[-] Hairyblue@kbin.social 35 points 1 year ago

What is a free download manager and why would someone need one?

[-] lemmyvore@feddit.nl 23 points 1 year ago

Back in the day when most stuff was on FTP and HTTP and your connection was crap and could drop at any time, you'd use a download manager to smooth things along. It could resume downloads when connection dropped, it could keep a download going for days on end and resume as needed, and it could abusing the bandwitdh limitations of the source site by using multiple parallel connections that pulled on different file chunks. In some ways it was very similar to how we use BT today.

It was also useful to keep a history of stuff you'd downloaded in case you needed it again, manage the associated files etc.

[-] drspod@lemmy.ml 16 points 1 year ago

and it could abusing the bandwitdh limitations of the source site by using multiple parallel connections that pulled on different file chunks

Also for files which had multiple different mirror sites you could download chunks from multiple mirrors concurrently which would allow you to max out your bandwidth even if individual mirrors were limiting download speeds.

[-] Dhs92@programming.dev 14 points 1 year ago

It's a download client that can pause/Resume downloads, as well as use multiple connections to download files

[-] Hairyblue@kbin.social 4 points 1 year ago

Like a BitTorrent?

I guess I just don't download that much stuff.

[-] schmidtster@lemmy.world 10 points 1 year ago

Sucks having your connection drop and having to redlownload the entire thing again. Managers are a fix.

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[-] puffy@lemmy.world 5 points 1 year ago* (last edited 1 year ago)

Back in the 2000s, browsers were really bad at downloading big things over slow connections since they couldn't resume, a brief disconnect could destroy hours of progress. But I don't think you need this anymore.

[-] gabriele97@lemmy.g97.top 25 points 1 year ago

How is it possible that users noticed strange behaviors (new Cron jobs) and they didn't check the script launched by those jobs 😱

[-] jsdz@lemmy.ml 66 points 1 year ago

Linux popularity going up means the percentage of users who know what cron is goes down.

[-] TheBat@lemmy.world 26 points 1 year ago

Is Disney finally making Tron sequel?

[-] NegativeLookBehind@kbin.social 16 points 1 year ago

No it’s a disease that makes you poop a lot

No that's Crohn's, cron is a type of headwear for monarchs

[-] NegativeLookBehind@kbin.social 4 points 1 year ago

No, I’m Jamaican, and BTW I use Arch, Mon

[-] Dubious_Fart@lemmy.ml 4 points 1 year ago

No, thats a crown.

A cron is a type of super virus that wants to destroy the entire net. An end to all things.. Total crash. Only another virus superpowered by core energy can put a stop to it.

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[-] d3Xt3r@lemmy.nz 5 points 1 year ago* (last edited 1 year ago)

They actually are, kind of. It's called Tron: Ares and it's been in production hell for some years, the most recent delay being due to the ongoing writer's strike. Filming is expected to start after the strike is over, but personally my enthusiasm for the movie died after they announced Jared Leto as one of the cast.

[-] Ferk@lemmy.ml 7 points 1 year ago* (last edited 1 year ago)

If they were complaining about cronjobs being created (like the post says), then they must have known what cron is.

[-] Norgur@kbin.social 17 points 1 year ago

Idk if I'd check crontab regularly.

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[-] insaneduck@lemmy.world 22 points 1 year ago

Finally linux is getting popular enough to make viruses. Yay?. Insert gru meme here

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[-] rufus@discuss.tchncs.de 8 points 1 year ago* (last edited 1 year ago)

Mmmh. You kinda deserve being infected if you do things like this. Every beginner tutorial specifically tells you not to download random stuff from the internet and 'sudo' install it. Every Wiki with helpful information has these boxes that tell you not to do it. I'm okay if you do it anyways. But don't blame anyone else for the consequences. And don't tell me you haven't been warned.

Also I wonder about the impact this had. It went unnoticed for 3 years. So I can't imagine it having affected many people. The text says it affected few people. And it didn't have any real impact.

But supply chain attacks are real. Don't get fooled. And don't install random stuff. Install the download manager from your package repository instead.

[-] ipkpjersi@lemmy.ml 8 points 1 year ago

I kind of disagree. Applications often require root permissions to install themselves, since regular users can't access certain folders like /opt, etc.

Also, do you really think that people would actually read the source and then compile all their software themselves? Do you do the same?

Generally though I do agree, you're probably fine installing software from your distro's repos but even that's not bulletproof and also it's not like third-party repos are uncommon either.

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[-] _cnt0@feddit.de 8 points 1 year ago

malicious Debian package repository

*laughs in RPM*

This comment was presented by the fedora gang.

[-] puffy@lemmy.world 13 points 1 year ago

Right, but you could do the same with RPM. Not everyone is aware of this, but installing a package executes scripts with root access over your system.

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[-] rurb@lemmy.ml 6 points 1 year ago

I had to essentially read the same thing four times before there was any new information in this post. Not sure if that's a Jerboa thing or what, but probably could have been avoided.

[-] drspod@lemmy.ml 8 points 1 year ago

Yeah I agree, sorry about that. I thought that the body-text field was mandatory to fill in, so I used the introductory paragraph from the article so as not to editorialize.

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this post was submitted on 12 Sep 2023
332 points (99.1% liked)

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Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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