ILOVEYOU (2000): When Love Was a Virus (Literally)

The report recounts the 2000 ILOVEYOU worm: a VBS-based email worm distributed as 'LOVE-LETTER-FOR-YOU.txt.vbs' that executed a script to overwrite files, steal credentials, and propagate to all contacts, infecting roughly 50 million computers and causing an estimated $10 billion in damage; the document also promotes WatchGuard endpoint, DNS, and zero-trust services as mitigations that would have blocked execution and network activity.