Thanks to all who responded. Just a little background, although thumb drive was standard, I password protected the individual files with Axcrypt. I was using Malwarebytes and Eset full security but I think I found a files that could be the culprit to all this. It was something like service.hostexe* and when I clicked on it, a pop-up appeared asking for a password and username. I did some research on this and it is described as a threat, although there is no way to know if this was responsible for the hack. When I deleted it, it aromatically reinstalled itself upon reboot. It went undedected, but for any one who is curious, it was found in app data...roaming. I have since reformatted my hard drive and it is no longer there. One this I noticed was that when you unplug a thumb drive from a pc, it writes some of the files to your hard drive which seems counterintuitive since one point of using an external drive is for privacy.
I know there is nothing I can do at this point, but I hope this helps someone in the future.
I'm interested in how you got caught that virus/malware if you have Eset and Malwarebytes(is this premium or free version?)because it should be good protection.My antivirus is scan every file which is try to download to my PC,and firewall + Malwarebytes Premium for now proved to be adequate protection.
Do you have your seed/private keys backup on your PC/laptop maybe?
It seems that you have on your computer RAT(remote access trojan),and it is good that you formatted hard drive.Hardware wallet is only safe way to store
BTC these days since hackers find ways how to steal our coins.