French submarine-maker targeted by hackers
FRANCE, JUL 28 – Hackers claim to have stolen 1 terabyte of sensitive naval data and demand ransom, while Naval Group denies any confirmed breach and calls it a reputational attack.
- On July 26, 2025, France's Naval Group confirmed it 'immediately launched a technical investigation' after hackers claimed to possess 'top secret' data on a dark web forum.
- Attackers threatened to publish confidential data unless Naval Group paid, framing the incident as extortion, with hackers claiming to have breached core systems and demanding payment within 72 hours.
- The breach was posted on DarkForums after threat actor Neferpitou published a 13 GB sample, and an investigation is underway regarding a cybersecurity threat to Naval Group.
- Naval Group insists it detected no intrusion and has filed a complaint with the French judicial authorities, collaborating with the French government and external experts.
- Potential access to naval combat software poses risks, as GlobalData projects the defense sector cybersecurity market will reach $290bn by 2027, experts warn.
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29 Articles
A hacker has been threatening to reveal ultra-sensitive data from the Naval Group since Tuesday. The European leader in the naval defence sector confirms that the first leaked documents are authentic. At this stage, this malicious action is more like an attempt to destabilise than a real cyberattack. - VERIF - "Cyber attack" against Naval Group: leaking sensitive data or attempting to destabilize? (International).
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According to DRSD, interference with our defence companies remains high. The cyberattack that Naval Group has just suffered falls into this category.
The builder of warships and submarines would have been targeted by one or more hackers. The group assures that it has not noticed any intrusion and denounces a "reputational attack"
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