Ransomware Attack Delays Shipyard Production at Marinette Marine Shipyard

June 27, 2023


Fincantieri Marinette Marine suffered a ransomware attack last week that delayed production across the shipyard. Large chunks of data on the shipyard’s network servers were rendered unusable by an unknown professional group.

The attack on Marinette Marine targeted servers that held data used to feed instructions to the shipyard’s computer numerical control manufacturing machines, knocking them offline for several days. CNC-enabled machines are the backbone of modern manufacturing, taking specifications developed with design software and sending instructions to devices like welders, cutters, bending machines and other computer-controlled tools.

Based on information from the Navy, it’s unclear if the attackers stole any data. The yard is currently on contract to build four combatants for the Saudis and three frigates for the U.S. Navy, with the service planning to ramp up procurement in the pursuit of buying two frigates per year. The Navy acknowledged the attack in a statement but did not provide additional details.

UPDATE: The company notified regulators in Maine that personal information of 16,769 individuals was leaked due to the ransomware attack.

Incident Date

April 6, 2023

Estimated Cost

Delays in construction with CNC machines offline for several days

Type of Malware

No Malware identified

Threat Source

No threat source identified