At Black Hat, security researcher Vangelis Stykas reveals what he found by lurking inside North Korean hackers’ infrastructure for nearly two years: They got footholds inside 1,640 networks, by his count. About half of those intrusions were serious breaches. https://www.wired.com/story/a-security-pro-hacked-north-korean-hackers-he-found-theyd-breached-hundreds-of-networks-worldwide/