"We are now assessing the situation", the shipping company posted on Twitter adding that the source of the outage is not known. RT also reports that worldwide steel and mining company EVRAZ has also fallen victim to the cyberattack, as well as Britain's WPP, the world's biggest advertising agency.
WPP owns agencies including JWT, Ogilvy & Mather, Young & Rubicam and Grey.
Shipping company AP Moller-Maersk said every branch of its business was affected by the hack.
"A huge cyber-attack has been started against Ukraine".
Separately, the Russian oil giant Rosneft announced that its servers has been hit by a "powerful hacking attack", which knocked the company's website offline on Tuesday afternoon.
The defence ministry described the blast as a "terrorist act".
Heavy rain, winds, tornado warnings as Cindy heads inland
Moderate to heavy rain fell hundreds of miles away, throughout much of the Southeast and as far north as southern IL and Indiana. Rainfall amounts through Friday will likely average from 2 to 4 inches in the watch area.
Rosneft, the world's largest publicly listed oil company by production, said it had contacted law-enforcement authorities about the attack.
Dispatchers are seen inside the control room of Ukraine's National power company Ukrenergo in Kiev, Ukraine, October 13, 2016.
Company and government officials reported major disruption to the Ukrainian power grid, banks and government offices.
Ukraine has blamed Russian Federation for previous cyber attacks, including one on its power grid at the end of 2015 that left part of western Ukraine temporarily without electricity.
Ukrainian Deputy Prime Minister Pavlo Rozenko said on Tuesday that the government's computer network was down, and posted a picture on Twitter of a computer screen showing an error message.
Ukraine's National Bank said in a statement that an "unknown virus" has caused banks "difficulties in serving clients and carrying out banking operations".