The content originally appeared on: CNN New York (CNN Business)North Korean hackers stole nearly $400 million worth of cryptocurrency in 2021, making it one of the most lucrative years to date for cybercriminals in the severely isolated country, according to a new report. Hackers launched at least seven different attacks last year, primarily targeting investment firms and centralized exchanges with a variety of tactics, including phishing, malware and social engineering, according to the report from Chainalysis, a firm that tracks […]