A massive cyberattack appears to have hit Europe, touching a number of countries, companies and public domains. WPP, one of the world’s largest advertising agencies confirmed on Twitter that it’s IT system has been affected from a possible cyberattack. WPP’s website was down as of 10:30 a.m. ET. The AP is reporting that Ukraine’s prime minister Volodymyr Groysman says the cyberattack is ‘unprecedented’ but that ‘vital systems’ haven’t been affected. The New York Times is reporting the Ukrainian banks and an electricity firm have been attacked. A Ukrainian official wrote on his official Facebook page that a Ukrainan airport’s IT systems had been compromised. Per the WSJ , Russia’s state-controlled oil company (and the world’s largest publicly listed oil company by production), PAO Rosneft, said it was under a "massive hacker attack" but said its oil production hadn’t been affected. The WSJ also reports that an attack brought down computer systems across Denmark’s shipping giant Maersk, which runs the world’s largest container operator. More ransomware: Daniel Smith, security researcher at Radware, says the attack is a global ransomware campaign, meaning the attackers are asking victims to forever money to be relieved. "This outbreak is leveraging the ransomware variant PETRWRAP/PETYA and requesting $300 BTC upon infection. Early indications suggest this campaign is spreading via the EternalBlue Exploit," Smith says. Growing cyber threat worldwide: The attack comes just over a month after the massive WannaCry ransomeware attack , conducted by a North Korean hacking group, that spread to 300,000 breaches across 150 countries. Last October, a DDOS (distributed denial of service) cyberattack shut down a huge portion of the internet . This story is being updated.