Microsoft warns of potential Russian cyber attacks.

Microsoft has warned against potential ransomware attacks by the notorious hacking group Sandworm, which has links to Russia's military intelligence agency GRU. Sandworm is responsible for attacks on Ukraine's electric power grid, government agencies, the 2018 Winter Olympics, and businesses worldwide. The group appears to be preparing for a renewed destructive campaign, with a ransomware attack on Polish and Ukrainian transport services in October seen as a "trial balloon" for further attacks and a potential precursor to other Russian hacks beyond Ukrainian soil.