Chinese hackers launched in July a massive attack against the Cyworld social network in South Korea and the Nate Web portal run by SK Communications. SK owned Cyworld, which was used by renowned Korean socialites and celebrities, as well as average Koreans. The attacker compromised the accounts of 35 million people, stealing phone numbers, email addresses, names and encrypted information. The Korean Communication Commission traced the attack back to computer IP addresses based in China. The huge hack followed a series of cyber-attacks against South Korea's government and financial institutions. Institutions targeted included a government-backed bank, Hyundai Capital, Korean government ministries, the National Assembly, the country's military headquarters and networks of U.S. Armed Forces based in Korea.