Hackers Leak Sensitive Russian Naval Systems Data in Major Cyber Breach
July 1, 2025 – Moscow, Russia — A major Russian defense contractor, NPO Mars, has reportedly suffered a massive cyber breach, with hackers claiming to have stolen 250 gigabytes of sensitive military data, including details on naval command and control systems used by the Russian Navy.
The breach, first disclosed on a popular data leak forum, includes technical manuals, internal documents, and software files allegedly tied to SIGMA, DIEZ, and TRASSA—automated systems responsible for missile guidance, anti-submarine warfare, and minesweeper coordination.
A Deep Dive into Naval Infrastructure
Cybersecurity researchers at Cybernews, who analyzed samples of the leaked data, confirmed that some files were as recent as March 2025, suggesting the breach may have occurred within the last few months. The exposed documents include PDF scans, system blueprints, and operational protocols, many of which appear to be classified or restricted.
Among the most alarming revelations are files related to SIGMA-20385, a combat information system used on Russian corvettes and missile ships. Another system, DIEZ, is designed to manage minesweeper operations, while TRASSA supports navigation and targeting for larger naval vessels.
Hackers Send a Message
The attackers released a video allegedly demonstrating their ability to manipulate data within the DIEZ system, warning, “That unfriendly submarine might not be as slow as the system indicates. And it might be closer than you think.” The video has sparked speculation about whether the breach could compromise real-time naval operations or vessel safety.
Strategic and Political Fallout
NPO Mars, a state-linked research and production center with roots dating back to 1961, has been under international sanctions since Russia’s invasion of Ukraine in 2022. The company plays a critical role in developing automated control systems for Russia’s military, including tanks, ships, and armored vehicles.
While the Russian government has not officially commented, cybersecurity experts warn that the breach could have far-reaching implications for national security and military readiness. “This isn’t just a data leak—it’s a strategic vulnerability,” said one analyst.
The Bigger Picture
The breach underscores the growing role of cyberwarfare in modern conflicts, where digital espionage and sabotage can rival the impact of traditional military operations. It also raises questions about the cyber hygiene and resilience of even the most fortified defense institutions.
