The Kovter infection is a Trojan that performs click-fraud while running on your computer. This infection is typically installed via exploit kits found on hacked web sites or TrojanDownloaders like Nemucod. When the infection is stored in memory it will create various autorun entries that start the infection when you login to the computer. Symantec’s Kovter Removal Tool can be used to easily remove this infection from your computer and can be easily removed from your machine using instructions in the removal guide.
Source: https://www.bleepingcomputer.com/virus-removal/remove-kovter-trojan