In /C:/Users/(My Name)/AppData/Local/Temp there is a strange file called "start.html" that when opened, just opens up my web browser with a message that says "hallo". When I saw this, I got really scared and thought it was a RAT virus or something. Can someone help me figure out what this is and help me out? I've run multiple different virus scans and nothing came up. This is what it looks like: http://puu.sh/dhobB/7971c05f3f.png