As The Independent is reporting this morning, it appears that Ukraine is under a sustained cyber assault: "Ukraine’s national bank, state power company and largest airport are among the targets of a huge cyber attack on government infrastructure. Rozenko Pavlo, the deputy Prime Minister, said he and other members of the cabinet were unable to access their computers. ...."
This is, of course, how the Russian invasion of Georgia began .....And the timing is ripe for any number of geopolitical reasons.
UPDATE: Happily, it now appears that the intrusion is the result of an outbreak of the Petya ransomware virus -- a ransomware system the exploits the same NSA-leaked Eternal Blue vulnerability that was at the core of the WannaCry ransomware. This is a good news/bad news answer. The good news is that it isn't a precursor to war -- in fact, Russian sites are also being attacked. The bad news is that even after WannaCry systems were not patched -- and this virus is much more vicious. It overwrites the master reboot record, so you can't even reload a clean operating system!