Reuters: A mysterious computer virus believed to be from Russia infected hundreds of thousands of PCs around the globe after attacking the U.S. military’s Central Command in an unprecedented breach uncovered in 2008, according to the details of new research released on Wednesday.

Costin Raiu, director of research at Moscow-based Kaspersky Lab, told Reuters on Wednesday that at least 400,000 computersacross Russia and Europe were infected with the virus, dubbed Agent.BTZ, based on the number of infections detected by his firm’s anti-virus software.