WannaCry

WannaCry is a ransomware attack that occurred in May 2017, targeting computers running Microsoft Windows. It encrypted users' files, making them inaccessible, and demanded a ransom payment in Bitcoin to restore access. The malware spread rapidly, affecting thousands of computers worldwide, including those in hospitals, businesses, and government offices. WannaCry exploited a vulnerability in Windows that had been previously identified by the U.S. National Security Agency (NSA). The attack highlighted the importance of cybersecurity, software updates, and the need for organizations to protect their systems against similar threats.