In June 2017, Maersk was infected with by the NotPetya ransomware outbreak.

In an Interim Report for Q2 2017 Maersk’s CEO warned that the cyber attack is expected to “impact results negatively by USD 200-300m”.  The entire network was down for days leading to knock-on effects to the global shipping industry.

Maersk reported the downtime of its email and address system meant it was forced to rely on WhatsApp and private phones to communicate.

Source: The Register