Reports have linked the attack to the Ryuk ransomware.
Attacks targeting critical infrastructure system are ramping up – and defense has become a top priority for the U.S. government.
Operation Sharpshooter uses a new implant to target mainly English-speaking nuclear, defense, energy and financial companies.
Dixons Carphone said it discovered a massive cyberattack on its processing systems that targeted millions of payment cards and personal data records.
A cyber-attack has brought the websites of both ticket distribution service Ticketfly – and the major venues it services – offline on Thursday.