In cyberwarfare, the toughest question to answer definitively is ¡°Who did it?¡±

It¡¯s no surprise then that Microsoft Corp. avoided the attribution on everyone else¡¯s lips in its analysis of last week¡¯s cyberattacks on Ukraine. That would be Russia. But several clues suggest they not only came from the Kremlin but will follow a pattern of spilling into other countries in Europe and the U.S., too.

That ratchets up geopolitical tension across the world: Ukraine is currently bracing for potential military action from Moscow; Russian President Vladimir Putin has over 100,000 troops at the border; and Moscow¡¯s security talks with the U.S. and NATO have broken down.