Ukrainian Hackers Raid Russia's Naval Files, Walk Away With Secrets From 70 Projects

Ukrainian hackers gained access to a large collection of Russian naval files, obtaining technical documentation linked to 70 projects involving submarines, warships, systems, sonar technology, and autonomous underwater vehicles.

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The cyber operation, dubbed “Poseidon,” was carried out by Ukrainian Militant, the group said on September 20. According to the hackers, the compromised data covers Russian naval research, engineering, testing, and operational documentation, including files marked “secret” and “top secret.”

The materials reportedly contain information on nuclear-powered and diesel-electric submarines, frigates, corvettes, landing ships, and vessels designed for Arctic operations.

Among them are Project 949AM Antey nuclear-powered submarines and Project 636.3 Varshavyanka diesel-electric submarines, as well as ships belonging to Projects 22350, 20386, 23550, 11711, 23770, and 23900.

For some of these projects, Ukrainian Militant said the files reveal details of equipment and modernization, onboard hardware placement, cable connections, information interfaces, and testing results.

The archive also reportedly includes technical requirements, operating manuals, structural and functional diagrams, algorithms, accuracy and reliability specifications, testing procedures, and acceptance documents.

Beyond individual ships and submarines, the breach reportedly covers a broader range of Russian naval technologies, including ship and underwater , integrated control systems, sonar, radio , inertial systems, digital hydrography and mapping, and marine robotics.

Some of the documented research concerns autonomous for submarines and underwater vehicles using terrain and geophysical fields, technologies intended to allow them to determine their position without relying solely on satellite .

Ukrainian Militant also identified a series of systems and development programs in the obtained files, including Simfoniya, Chardash, KAMA-NS-VK, Sprut-N1, Priliv, 14Ts217, AKNG/PNG-23820, and ISU NK-23550.

The group said the archive contains materials associated with major Russian organizations involved in naval and underwater technology, including the Rubin and Malachite submarine design bureaus, the Elektropribor research institute, Okeanpribor, Elara, the Vega concern, and Russia’s State Research and Hydrographic Institute.

According to Ukrainian Militant, the documents also provide information on cooperation between contractors, research and development stages, testing, and the status of individual programs.

In total, the hackers said the obtained files concern Russian scientific and technical work supporting 70 ship, vessel, and submarine projects currently under construction or modernization. The full scope and authenticity of the archive have not been independently verified.

The naval breach follows other major leaks involving Russia’s defense industry. In November 2025, Ukrainian-linked hackers obtained classified documents related to Russia’s PAK DA strategic bomber and Su-57 fighter, exposing technical details of key aircraft components and the programs’ reliance on foreign manufacturing equipment.

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