The Vundo family of Trojans is one of the most common infections we find on user’s computers. This infection can cause popups that include advertisements for rogue anti-spyware programs. Users are normally targeted by false positives, fake alerts, and warning of infections on their computer. The infection has evolved over time to include harder and harder protection methods so that it cannot be easily removed. The most common method of infection is through outdated versions of the Sun Java platform. The following guide will explain how to use the tool to rid your system of this malware.
Source: https://www.bleepingcomputer.com/virus-removal/remove-vundo-virtumonde