Inside the Ring: North Korea’s Hack Threat

This undated picture released by North Korea's official Korean Central News Agency (KCNA) on April 26, 2017 shows North Korean leader Kim Jong-Un attending the combined fire demonstration of the services of the Korean People's Army in celebration

The FBI and Department of Homeland Security warned this week that North Korea is using malicious software to set up networks of hijacked computer devices that can be used in large-scale cyberattacks on critical infrastructure.