A Los Angeles federal jury on Thursday convicted a man of three felonies for his operation of two websites that enabled subscribers to attack computers and disable internet access, capping a nine-day trial that walked jurors through an internet-based underworld of cyberattacks that targeted homes, schools, universities, government websites and financial institutions across the globe.

Matthew Gatrel, 32, of St. Charles, Illinois, is to be sentenced Jan. 22 by U.S. District Judge John Kronstadt of the Central District of California for a conspiracy involving so-called distributed denial of service (DDoS) attacks, a government-recognized term for coordinated cyberattacks that commandeer and control targeted software.