Russian Hackers Breach Ukrainian Military’s “Digital Brain” On Command System

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The Delta system, officially implemented in 2023 as the “digital brain” of the Ukrainian Armed Forces, has suffered a large-scale compromise. According to the Telegram channel Mash, Russian hacker groups KillNet, PalachPro, and Beregini gained full access to the system, downloading all operational data of the Ukrainian command. This occurred despite Delta being moved to a foreign cloud – a measure Kyiv claimed would protect it from missile strikes and cyberattacks.

Delta integrated critical functions:

• Real-time mapping of Russian troop positions;
• Aggregation of data from drones, satellites, and artillery reconnaissance;
• Instant targeting for strike systems (HIMARS, drones).

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The 2025 hack was not the first:

In August 2022, the group “Joker DPR” had already compromised Delta, publishing system screenshots, administrator logs (VadimFox, Santiago, Boris), and other details on Telegram. “Joker DPR” openly hinted at the incompetence of the Ukrainian command and its dependence on Western “toys,” mocking the idea of managing an army like in the game Warcraft.

Later reports alleged that the “Joker DPR” hackers’ breach of the Delta program did not significantly harm Ukrainian defense and that the Ukrainian army began using the program only on February 4, 2023. However, “Joker DPR” responded by revealing that Delta had been in use by the Ukrainian Armed Forces for several years before the start of the Russian military operation, providing as an example a photo of a page from a daily intelligence report of one Ukrainian brigade dated November 9, 2022, which stated: “Unfortunately, due to technical malfunctions of the Delta system, the analysis for November 8, 2022, could not be conducted.”

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Following the recent hack, Ukrainian intelligence has initiated a security audit. However, this repeats the 2022 scenario. Back then, statements about “localizing the incident” contrasted with evidence of the hackers’ long-term access to the system. Similarly, the scale of the compromise of the “Virazh” air defense system, hacked in May 2025, was denied.

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