VBS:Gamaredon on prefs.js file

Hello Pedro,

We're here to help you.
Have you received any popup error messages while trying to access the youtube-nocookie.com site? If yes, could you please share the screenshot of the threat secure message with the 'See Details' to investigate further? 
Refer to this article (https://bit.ly/2Y6RCDP) for the steps to capture the screenshot.
You can post the screenshot here on your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
Thank you.

Hello,

Today I was searching the internet with one of my computers and AVG cancelled a connection to a youtube-nocookie.com site (don't know why, never been there) saying that there was an imminent APT threat. I closed Firefox but, nonetheless, after a few seconds AVG sent the prefs.js file to quarantine for another APT named VBS:Gamaredon-CM.

From what I searched, APT seems to be a very very serious, targeted attack, and Gamaredon seems to be a very dangerous threat. I'm not involved in anything that could make anyone want to target me. At that moment, I was just search Linkedin and Medium.

Could you please share some info on why this could have happened? What can I do to assure safety? Could this be a false positive? Would really appreciate any help, as this is a scary situation indeed...

Hello Pedro,

We're here to help you.
Have you received any popup error messages while trying to access the youtube-nocookie.com site? If yes, could you please share the screenshot of the threat secure message with the 'See Details' to investigate further? 
Refer to this article (https://bit.ly/2Y6RCDP) for the steps to capture the screenshot.
You can post the screenshot here on your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
Thank you.