South Korea says hacking not from Chinese address March 22, 2013 -- Updated 1124 GMT (1924 HKT) Members of the Korea Internet Security Agency (KISA) check on cyber attacks at a briefing room of KISA in Seoul on March 20, 2013. Wednesday's suspected cyberattack hit 32,000 computers Nine companies fell victim to the malicious code Government computers weren't affected South Korea has blamed the North in the past, which has rejected the allegations Seoul, South Korea (CNN) -- The suspected cyberattack that struck South Korean banks and media companies this week didn't originate from a Chinese IP address, South Korean officials said Friday, contradicting their previous claim. The Korea Communications Commission, a South Korean regulator, said that after "detailed analysis," the IP address that was thought to be from China was determined to be an internal IP address from one of the banks that was infected by the malicious code. It said, though, that "the government has confirmed that the attack was from a foreign land." Read: Why cyber attacks threaten our freedom Widespread damage The military stepped up its cyberdefense efforts in response to the widespread outages, which hit nine companies, Yonhap reported, citing the National Police Agency. How the hackers got in and spread the malicious code remains under investigation, and analysts are examining the malware, a South Korean official close to the investigation said. Read: International cyber attacks on the rise Blaming North Korea in the past