This is the basic story of the ILOVEYOU computer worm, also known as the Love Bug, and it is one of the earliest examples of malware that caused significant damage on the internet.
Unless you’ve been completely offline (or not at all interested in American politics), you’ve likely heard about the massive blunder by President Trump’s administration, where top military and intelligence officials accidentally invited a critical journalist into a Signal group chat discussing airstrikes on Yemen’s Houthi rebels that started on March 15.