Hackers Claim 23TB Stolen From Russian Statistics Service After Cyberattacks

Hackers claim to have stolen 23TB of data from Russia's Federal State Statistics Service, known as Rosstat, after coordinated cyberattacks between October 29 and 31. Rosstat admitted its servers were hit, but denied claims that tens of terabytes of data had been leaked. The claim was made by the Belarusian CyberPartisans and Silent Crow, which said the haul includes data on Russian wartime losses marked "for official use only."

Rosstat's admission and denial

Rosstat said its servers were hit by coordinated cyberattacks between October 29 and 31. It denied claims that tens of terabytes of data had been leaked, as asserted by hack groups including the Belarusian CyberPartisans and Silent Crow. The agency stopped publishing annual cause-of-death statistics in 2024, according to the report.

Claimed data and casualty figures

The hackers say the 23TB data haul includes data on Russian wartime losses marked "for official use only," reports The Moscow Times. A chart shared by the groups suggests that as many as 50,000 Russian soldiers were killed every month over the last two years, with the October 2026 figure just under 50,000 if the leak is genuine. Rosstat is described as comparable to the U.S. Census Bureau and Bureau of Labor Statistics or the UK's Office for National Statistics.

Systems said to be wiped

A follow-up post about the attack said the entire IT infrastructure was wiped, listing domain controllers, databases, servers, virtualization, document workflow, workstations, admin consoles and VPN. It also listed systems said to be destroyed, including STATEK, CSOD, Demography, SED, ESSO, OFSN, internal employee surveillance, StatRegister, websites and more. The Rosstat website was reportedly defaced with hacker messages and logos, and Rosstat remained inaccessible at the time of writing.

Past claims and status

The same groups have claimed responsibility for the Aeroflot IT systems hack and a state real estate company hack involving two billion records, both in 2025. Both groups are designated as extremist and banned in Russia. The report describes the matter as a developing story, with the Belarusian CyberPartisans promising to share more sensitive information after reviewing it.

Sources: Tom's Hardware