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Microsoft Defender thinks Paint.net is suspicious


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Once or twice a day, the launch of Paint.net takes forever, maybe half a minute or even more. I found this topic and adding Paint.Net folder to Defender exclusions seems to fixed the problem. But why Defender thinks theres something suspicious in Paint.Net? 🤔 I dont use any plugins, any modifications, only clean portable app without any tweaks. I tried deleting whole app, whole settings in AppData, but with no effect. There wasnt such problem with 4.3 🤔

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1 hour ago, Slamb said:

Defender thinks theres something suspicious in Paint.Net?


Sounds like a Defender problem. 
 

1 hour ago, Slamb said:

adding Paint.Net folder to Defender exclusions seems to fixed the problem.


And, you answered your own question. 

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Could be related to this. If I can find a way to sign all of the DLLs without extending my build time by a crazy amount (it adds 30 minutes), that might help.

 

 

 

The Paint.NET Blog: https://blog.getpaint.net/

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i dont know how all these things work, but i understood you need some free timestamp server that does not have rate limiting 🤔 i tried to find some and found this https://freetsa.org/, it has many options and apis, but i didnt manage to find some info about rate limiting 😔 also found some fresh TSA list https://gist.github.com/Manouchehri/fd754e402d98430243455713efada710?permalink_comment_id=3810141#gistcomment-3810141, maybe you can find something suitable there 🤔

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Another thing is that Defender and other AVs will often "learn" over a week or two that a new release/update for Paint.NET is fine/legit, and will stop doing the in-depth security scans on it.

 

I've also seen them "forget" for older builds -- like if you try to run 4.2.16 today, it'll likely do a in-depth scan on it.

 

Adding your plugins folders to your AV's exclusion list is a good idea. The files get scanned anyway when you download them. It's not a perfect solution, from a security standpoint, but it's a reasonable balance.

The Paint.NET Blog: https://blog.getpaint.net/

Donations are always appreciated! https://www.getpaint.net/donate.html

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  • Solution

the problem is fixed 😊 instead of portable zip i downloaded install zip, extracted the exe and this version doesnt have problem with defender 😮 im testing it for one day already and no stuck at all

currently i use the content only from paint.net.5.0.install.x64\x64 folder, but there was also some PaintDotNet_x64.msi inside 🤔

 

Edited by Slamb
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