NEW YORK (AP) — More than a half-million computers in over 100 countries were infected by sophisticated malware that lets cybercriminals remotely hijack a computer and its webcam, authorities said as charges were announced Monday against nearly 100 people worldwide.

Authorities said 97 people suspected of using or distributing the malicious software called BlackShades have been arrested in 16 countries, including the software’s owner, a 24-year-old Swedish man.