JS:crypttonight

Jerry,
Not to worry, we are here to help you. Could you share the screenshot (  https://support.apple.com/en-us/HT201361 ) of the quarantined file to check and assist you further?

I scanned my mac and this was detected. I quarantined it. do i have to worry?

Jerry, For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru

Jerry,
Not to worry, we are here to help you. Could you share the screenshot (  https://support.apple.com/en-us/HT201361 ) of the quarantined file to check and assist you further?

Thank you for providing screenshots Jerry,
We have received your screenshots and I have escalated your case to our senior team to analyze the situation. We will contact you once we receive a reply or in need of more information.
Best regards,
Alok.

i sent 2 screen shots, but when i sent i get a question mark box in the center of my reply

Sorry for the delay in responding, Jerry. All files are in the quarantine should be fine - In case the same files are detected many times then please send samples for analysis False Positive File Form as it will be most probably False Positive. 

User-added image

Please let me know as well when this issue has been resolved. I'm still having the same issues on both of my computers.