Cyberattack that knocked out power in Ukraine last month is believed to have been initiated by a hacking group with strong Russian interests. Cybersecurity firm iSight Partners says a group called Sandworm was likely involved. The group has targeted NATO, western and Ukrainian government organizations and energy companies. The latest attack cut power to 80,000 customers for six hours in the country, according to a report from a U.S. energy industry security group. The attack has raised widespread concern as security experts have warned of the vulnerability of industrial control systems used by the energy industry.”]