Hacked Records Show 400,000 Russians Killed in War on Ukraine

The hacked Rosstat material offers an unusually detailed estimate of Russian deaths in Ukraine. It covers more than 11 million death certificates and related information, including residence, age, and location of death. Between February 24, 2022, and late August 2026, nearly 392,700 records explicitly connected fatalities to the war. That matters because Russia has stopped publishing many statistics and has not released updated casualty figures.

The records used coding and free-text descriptions. These included terms such as “military operation,” “shelling,” and “drones.” The data therefore identifies deaths through recorded links to wartime activity, rather than relying only on named military personnel. Silent Crow’s separate calculations reached about 450,000 by including broader categories and records without explicit causes.

The figure remains incomplete. Missing people, unidentified bodies, delayed registrations, and deaths from later injuries can escape the count. Other estimates include 285,881 deaths identified by name and about 352,000 through December 2025. Together, the figures point to a very large Russian wartime death toll.

Rosstat is Russia’s national statistics agency, according to the article. Its death-certificate records matter because they are administrative documents created as deaths are registered. They can contain details such as a person’s residence, age, location of death, and recorded cause. That makes them a potentially powerful source for measuring wartime losses.

The dataset reportedly contained more than 11 million certificates. Researchers searched coding fields and freeform text for terms connected with the war, including “military operation,” “shelling,” and “drones.” Nearly 392,700 certificates between February 2022 and August 2026 explicitly linked fatalities to the conflict. This provides a different measurement route from battlefield announcements or named lists.

The records are important because Russia has published few casualty statistics since the invasion’s early months. They are not a perfect total, however. Registration delays, missing people, unidentified bodies, later deaths from injuries, and unrelated classifications can all distort the count. Rosstat denied finding evidence of a database compromise, while the hackers said they extracted military-loss data.

Almost 392,700 death certificates in the obtained dataset explicitly connected deaths to the war between February 24, 2022, and late August 2026. The links appeared in coded fields or free-text descriptions mentioning military operations, shelling, drones, or similar terms. This is a recorded minimum, not necessarily the full number of people killed.

Different estimates count different populations. Mediazona and Meduza used Russia’s probate registry and estimated about 352,000 deaths through December 2025, excluding combatants from occupied Ukraine. Silent Crow estimated about 450,000 by adding non-combat deaths and records without an explicit cause. Mediazona and BBC Russian identified 285,881 deaths by name as of the month described.

The range also reflects timing and incomplete registration. Some deaths are registered months later. Missing people and unidentified bodies may not appear, while people who later die from war injuries may have unrelated causes recorded. The article also reports an estimate of about 400,000 as realistic, based on military sources and several tracking methods.

The records were obtained by Cyber Partisans, a Belarusian pro-opposition group, and Silent Crow, a Ukrainian hacker operation. They said they breached Rosstat’s internal infrastructure between October 29 and November 1. The groups reported access to about 25,000 computers and extraction of roughly 23 terabytes of data, including information on Russian military losses.

Their claim is supported by the existence of detailed records later shared with Bloomberg News and other outlets. Silent Crow also published its own calculations from the material, producing an estimate of about 450,000 deaths. These details suggest the attackers possessed substantial data, but the article does not independently prove every record’s origin or completeness.

Rosstat acknowledged targeted cyberattacks during the same period. It said parts of its infrastructure went offline and that systems were being restored. However, the agency said it found no evidence that databases had been compromised or confidential information leaked. The competing statements leave the data’s authenticity contested, even though its estimates align with independent casualty projects.

Death certificates are official records, but wartime deaths can be difficult to register accurately. Combat zones disrupt identification, transport, and paperwork. Some people are reported missing instead of dead. Others have no immediately identifiable body. These gaps mean a certificate-based count can understate the number killed.

The article identifies several mechanisms. A person may die from a war-related injury months later, while the certificate records no explicit connection to the fighting. Deaths may also be placed under unrelated categories or never recorded. Registration itself can lag for months, which especially affects recent totals. In 2026, nearly 37,800 military deaths had been recorded, but the article calls that figure almost certainly an underestimate.

These limitations explain why estimates differ. The Rosstat-linked records explicitly identify almost 392,700 deaths, while Silent Crow’s broader calculation reaches about 450,000. Other projects count only named deaths or use probate files with exclusions. No single dataset captures every missing person, unidentified body, delayed death, or misclassified cause.

Rising military deaths can shrink the pool of available troops, especially when replacements do not arrive quickly. The article says Russian monthly losses often exceed recruitment levels. It also reports nearly 37,800 military deaths recorded so far in 2026, though registration delays make that figure an underestimate. This creates pressure on Russia’s military manpower system.

The basic mechanism is a widening gap between people lost and people recruited. If recruitment brings in fewer troops than the battlefield removes, existing units become harder to maintain. The article says Russian forces have struggled to advance and that more than half of the recorded 2026 deaths occurred in eastern Ukraine. Heavy fighting can therefore increase both losses and replacement needs.

The likely consequence identified in the article is stronger pressure to mobilize. Moscow may soon have to mobilize more aggressively if recruitment cannot cover losses. The Kremlin has built digital infrastructure to summon people to the army, suggesting preparation for large-scale call-ups. The article does not state whether a new mobilization decision has been made.

Casualty figures become politically sensitive because they reveal the human cost of military decisions. Large losses can challenge official claims about progress, weaken public confidence, and increase pressure on leaders. In Russia’s case, President Vladimir Putin has tried to avoid acknowledging the scale of fatalities. The article says military losses in wartime or peacetime special operations were made a state secret as early as 2015.

Classification changes what can be measured publicly. Russia has not provided casualty figures since the invasion’s early months, and Rosstat gradually stopped publishing many statistics after 2022. Researchers therefore examine death certificates, probate records, named obituaries, and other partial sources. Each method captures different people and can produce different totals.

The result is an uncertain public picture. Independent projects identified 285,881 deaths by name, while other estimates reached about 352,000, 400,000, or 450,000. The secrecy does not erase losses, but it makes them harder to verify. It also allows disagreements over definitions, registration delays, and missing people to persist.