Theon internet service provider LG Uplus, which crippled several TV broadcasters and banks, originated from an IP address in China, according to South Korean officials.
The cyberattack occurred on Wednesday and caused disruptions to TV networks YTN, MBC, and KBS. Meanwhile, Shinhan Bank and NongHyup Bank were also affected.
During a press conference, a South Korea Communications Commission spokesperson said that the malicious code used for the attack came from an IP address in China, reported Reuters.
South Korea has yet to point fingers at North Korea for the most recent incident. The country had beenafter threats of physical and virtual attacks from its Northern Communist neighbours.
South Korea's police are still investigating the latest hacking.
The US were also victims of an online attack in January on news agencies New York Times and Wall Street Journal. China was blamed for the hacking, but the country.