‘Vulkan files’ leak reveals Putin’s global and domestic cyberwarfare tactics

Documents leaked by whistleblower angry over Ukraine war

Private Moscow consultancy bolstering Russian cyberwarfare

Tools support hacking operations and attacks on infrastructure

Documents linked to notorious Russian hacking group Sandworm

Russian program aims to control internet and spread disinformation

The inconspicuous office is in Moscow's north-eastern suburbs. A sign reads: Business centre". Nearby are modern residential blocks and a rambling old cemetery, home to ivy-covered war memorials. The area is where Peter the Great once trained his mighty army.

Inside the six-storey building, a new generation is helping Russian military operations. Its weapons are more advanced than those of Peter the Great's era: not pikes and halberds, but hacking and disinformation tools.