Russia’s war death toll is estimated at over 400,000 based on leaked death records from the country’s statistics agency, Rosstat, which multiple outlets say were obtained after cyberattacks claimed to have accessed and damaged Russian databases. The figures, attributed to hackers and later shared with major news organizations, point to a higher number of Russian deaths than Moscow has publicly acknowledged since it stopped publishing military losses in September 2022.
The leaked material is described as coming from millions of death certificates covering years since the full-scale invasion. Reported totals vary by method and definitions used by the hacker groups: one set of calculations is described as around 393,881 deaths, while another reaches about 450,100. Some outlets also describe how causes of death were categorized, including combat-related causes and deaths recorded as consequences of military action.
Outlets also focus on the cyber operation itself. Coverage refers to claims that the hackers breached Rosstat’s systems, destroyed parts of its IT infrastructure, and removed large volumes of data. A separate thread of reporting highlights that military losses remain classified, but the death-certificate data provides detail on age, place of residence, and location or cause categories such as shelling and drones.