In one of the most devastating cyberattacks, North Korean hackers infiltrated Sony Pictures, leaking unreleased films and sensitive emails. The attack was politically motivated and underscored the importance of email encryption and network segmentation.

WannaCry exploited a vulnerability in Windows systems, encrypting data and demanding ransom payments in Bitcoin. It highlighted the dangers of unpatched systems and the importance of regular software updates.

Stuxnet was a sophisticated cyberattack targeting Iran's nuclear facilities. It showcased how cyber warfare can cripple critical infrastructure and emphasized the need for industrial system security.