Windows Defender detecting Virus JS/Adrozek.A

[vendimia]

vendimia last edited by leocg

Hello, I hope you can help me.

I have a problem that is happening to me on all my computers and also to other people I know who use Opera.
The problem is that Windows Defender detects the files that Opera generates in the following location as a virus

file: C:\Users\Usuario\AppData\Roaming\Opera Software\Opera Stable\Code Cache\js\c0ac6bec106548d2_0

I deleted everything that was in that folder but when Opera starts to create the files again Windows defender starts notifying me of viruses all the time, I think they are Opera cache files, it becomes impossible to use because it is one alert after another.
Deactivate extensions and stay the same

[leocg]

leocg Moderator Volunteer @vendimia last edited by

@vendimia You need to try to find out from which page it's coming from. Supposing that it's not a false positive.

[vendimia]

vendimia @leocg last edited by

@leocg Hi! The page that generates it is indistinct, even if I clean the history and cache it happens again, here I leave a link to this report that other users already experience.
https://answers.microsoft.com/es-es/protect/forum/all/windows-defender-me-detecta-archivos-temporales/0e10a04a-06a1-4782-b51c-0e91bf992734

[sgunhouse]

sgunhouse Moderator Volunteer last edited by

Whigh websites do you have open? What extensions are installed? Either might be downloading a virus to your system.

[leocg]

leocg Moderator Volunteer @vendimia last edited by

@vendimia Did you empty the Code Cache folder, where the supposed malware were found?

Your are probably visiting the problematic page again, so you are getting the alert.

[quocvo]

quocvo @vendimia last edited by

@vendimia I got the same problem

[tjall]

tjall last edited by

+1

[rxckeet]

rxckeet last edited by

yea, same.

[burnout426]

burnout426 Volunteer last edited by

I'd copy the file and look at it in a text editor and hex editor to see if there's anything revealing. Might have to run it through a Javascript bytecode decompiler or something too.

Anyone want to zip up the file and make it available for download?

[tjall]

tjall last edited by This post is deleted!

[wanderlei]

wanderlei last edited by

Same issue for me. Opera browser keeps generating this threat. Website visited is irrelevant to its creation.

[leocg]

leocg Moderator Volunteer @wanderlei last edited by

@wanderlei So after you have cleaned cache and the directory mentioned on the alert, you get the alert again in the first page you visit?

[burnout426]

burnout426 Volunteer last edited by burnout426

@tjall, just pasting this part of the URL you posted in Notepad++ triggers Windows Defender for me (in the Notepad++ backup file that gets auto-generated for the document):

I suggest others with this problem look in the detected file to see what URL is listed. Just in case, do a screen shot of it or something so it doesn't trigger defender when users visit this thread

[Svarnoy60]

Svarnoy60 @leocg last edited by

@leocg @vendimia Вам нужно попробовать узнать, с какой страницы он идет. Предположим, что это не ложное срабатывание.

ни с какой страницы. просто при открытии браузера

[vsolanic]

vsolanic last edited by

I have the same issue. Is it clear by now if it is a real virus, or what exactly it is?

[wanderlei]

wanderlei @leocg last edited by

@leocg said in Windows Defender detecting Virus JS/Adrozek.A:

@wanderlei So after you have cleaned cache and the directory mentioned on the alert, you get the alert again in the first page you visit?

What happen with me, I got alert from defender, I removed the suspect file, I start browsing completely different site, the same alert from defender again. This happened 6 times across different sites.

I downloaded and ran malwarebytes but everything thing was clean.

I run a few extensions, I will disable all of those and see what happens.

[mouse]

mouse last edited by

@wanderlei said in Windows Defender detecting Virus JS/Adrozek.A:

wanderlei

I suspect you're right. It's not a bad web page. Not likely that we're all on that web page. This has been happening for just a few days. I think it's a false positive. When I run Super anti-spyware or Spybot on the cache, it picks up no threat. But i could be wrong.

[jclinansmtih]

jclinansmtih last edited by

Same thing just started popping up for me too. Only with Opera. I am starting to wonder if there is something going on with Windows Defender and Opera. We all cant be visiting the same sites who have posted in this thread.

[quocvo]

quocvo last edited by

I just removed a video dowloader extension. And It worked. Hope it help.

[burnout426]

burnout426 Volunteer @quocvo last edited by

@quocvo What's the name and link of the extension?