Hey there! Agreed! Which program did you do a malware scan with?
Anyhow you can’t go wrong with:
Press Command Option and Escape to pull up the force quit menu.
Force quit every app open, and for Finder press “Relaunch”.
Check System Preferences > Users and Groups > Login Items.
Remove any unknown items by highlighting and pressing the “-“ sign, then restart.
If issues after the restart, as said before, I’d startup in Safe Boot, (Startup your Mac while holding the Shift key), see if it’s normal, then reboot normally.
If that doesn’t fix the problem, can you tell us what app you did this malware scan with? And what browser you use normally? (Safari Chrome Firefox etc). Either way, I’d check System Preferences, see if you have a category called “Profiles”, and if so, remove them in the same fashion as Login Items, then restart to test. Cheers.