Rosstat hack: Hackers reveal Russian Federation losses of 393,000 to 450,000 killed

Data theft from state statistics

Hacker collectives "Cyberpartisans BY" and Silent Crow claimed a successful hack of the Federal State Statistics Service of Russia (Rosstat). According to them, the attackers gained access to approximately 23 terabytes of information. Among the stolen items are internal documents, demographic and economic indicators, as well as data on Russian losses in the war against Ukraine.

The published materials allowed the groups to conduct an independent analysis of the number of deaths since the start of the full-scale invasion in February 2022.

Difference in estimates due to calculation methods

The results of the two hacker groups' research differ significantly. According to "Cyberpartisans BY", as of 27 August 2026, at least 393,881 Russian citizens have died. In contrast, Silent Crow cites a significantly higher figure — 450,100 killed.

This spread is explained by the different criteria used by the hackers to classify cases of death.

"Cyberpartisans BY" in their estimate considered only those cases where the official cause of death was indicated as military actions or their consequences.

The Silent Crow group applied a broader methodology. They included in the total number of losses not only those killed in combat, but also non-combat losses of military personnel, victims of terrorist acts, as well as people registered in Russia who died in occupied territories or in Ukraine, if the exact cause of death was not established.