Side note - are you really sure the virus is gone?
I work in cyber security (detection & response…literally poking at phishing emails, malware files, etc).
If I got comped bad enough to steal account passwords (meaning your browser cookies stolen, likely) I wouldn’t trust anything less than a full windows reinstall.
And I do this stuff for a living. For over a decade now.
Antivirus sucks at cleaning up after a compromise.
So no one has posted this. I work cyber security blue team.
It’s a cookie stealing attack and really common right now. Just google cookie stealing and MFA and you will find tons of articles on it.
You know how you don’t need 2 factor to login once you’ve done it once? Cookies. Password stealers are grabbing full profile data to pretend they are your browser.
2nd. Netsupport is not a trojan per se (if that is what you have), but it is very common tactic right now to get someone on the phone or chat (typically via a fake invoice charging a bunch of money, or a fake AV chome popup) and trick them into installing the remote access software.