It began in Ukraine — inside a widely used tax accounting software called M.E.Doc. Attackers compromised the update server and delivered a poisoned software patch to businesses across the country.

Captain Crunch & The 2600 Hz Whistle: The Toy That Opened the Phone System
Long before ransomware, zero-days, or nation-state APTs, the world’s most powerful communications network could be hacked with a plastic toy whistle from a cereal box.

