Advanced hackers have targeted U.S. and European energy companies in a cyber espionage campaign that has in some cases successfully broken into the core systems that control the companies operations. Malicious email campaigns have been used to gain entry into organizations in the United States, Turkey and Switzerland, and likely other countries well. The cyber attacks, which began in late 2015 but increased in frequency in April of this year, are probably the work of a foreign government and bear the hallmarks of a hacking group known as Dragonfly.”]
Source: https://informationsecuritybuzz.com/articles/hackers-gain-entry-us-eu-energy-sector/