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[ALERT] Lemmy.World Compromised
(lemmy.world)
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this post was submitted on 10 Jul 2023
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Lemmy Be Wholesome
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In the interests of being wholesome and helpful, I used a secure method to retrieve the contents of that URL without providing my own cookie info.
I accessed and extracted the .png image directly using a similar method, then dug through it with a hex editor. As best I can tell, there's nothing particularly weird about the image itself or its metadata.
The HTML file pointing to the image contains a bunch of trackers from imgur. Google analytics, Facebook, scorecard research, etc. Those are certainly things to be concerned about, but I didn't specifically notice anything unusual beyond the ordinary corporate-surveillance crudware (which was indeed written in JavaScript). None of these were in the image itself though.
Obviously it's impossible to prove that anything is safe, and I only spent 10 minutes looking into this, so you should still follow the OP's advice about not clicking on random links without thinking. However my quick analysis did not find anything particularly alarming.
It uses an onload event using a markdown parser bug to run JS and upload your JWT to a certain website.
That looks like something Imgur is doing then. Which is not surprising at all. If it's a free service, you're the product, right?
Honestly the sketchiest thing I found was the use of BTLoader, a self-described 'adblock revenue recovery service'.
When getting chatgpt to decode the js, it spoke about a URL that went to a website ending in .zip/save in the interests of security I will not be posting it.
It wasn't solely the image that drew redflags but the js that appears to come before it. There is more to that URL than the file. I won't be posting the full details here. In a DM I can provide if you would like to see it and analyse it further
Sure, send it my way. If it sufficiently malicious, I'll maybe have fun dissecting it. You should know that messaging on Lemmy is not secure though.