Cyberattack at French Warship Builder – Hackers Leak 1TB of Data

October 8, 2025

INCIDENT

France's state-owned defense firm Naval Group is investigating a cyberattack. A hacker using the moniker Neferpitou claimed to have stolen approximately 1TB of the company’s internal data. The Naval Group released a statement on July 26. "All of our teams and resources are currently mobilized to analyze and verify the authenticity, origin, and ownership of the data as quickly as possible. At this stage, no intrusion into our IT environments has been detected and there has been no impact on our activities.”

Naval Group was given 72 hours to negotiate an extortion payment. Soon after, Neferpitou leaked the entire 1TB dataset on the forum.

Incident Date

July 23, 2025

Location

France

Estimated Cost


No cost values disclosed.

Victims

Type of Malware

No Malware identified

Threat Source

No threat source identified