All over the world, organizations of all sizes, including small businesses, scrambled to upload patches and to figure out if they'd been infiltrated.
Each time big software companies have changed default settings or made blanket changes with cybersecurity in mind, he points out, cybercrime fell measurably.
Some of its donors are big technology companies.
"Microsoft takes email security very seriously," said Girish Chander, head of Microsoft Defender for Office, in a statement to CNBC.
Updating email software default settings.