Skip to main content

Hacking attack on South Korea traced to China, officials say

By Michael Pearson. K.J. Kwon and Jethro Mullen, CNN
updated 10:41 PM EDT, Wed March 20, 2013
STORY HIGHLIGHTS
  • NEW: Attack traced to IP address in China, officials say
  • North Korea has staged similar attacks in the past, expert says
  • Banks, broadcasters targeted; government networks unaffected, Yonhap reports
  • South Korean military steps up its cyberdefense efforts in response

Seoul, South Korea (CNN) -- The suspected cyberattack that appeared to target South Korean banks and broadcasters Wednesday originated from an IP address in China, South Korea's Communications Committee said in a statement Thursday.

The attack damaged 32,000 computers and servers of media and financial companies, the committee said.

South Korean officials are analyzing the cause and are working to prevent any further damage, the committee said.

The attack infected banks' and broadcasters' computer networks with a malicious program that slowed or shut systems down, officials and the semiofficial Yonhap News Agency said.

Suspicion immediately fell on North Korea, which has recently renewed threats to go to war with the South amid rising tensions over Pyongyang's nuclear weapons and missile testing and international efforts to stop them.

South Korea's military stepped up its cyberdefense efforts in response to the widespread outages, which hit nine companies, Yonhap reported, citing the National Police Agency.

Government computer networks did not seem to be affected, Yonhap cited the National Computing and Information Agency as saying.

Experiencing a potential cyberattack
Cybersecurity concerns for China, U.S.

A joint team from government, the military and private industry was responding, a presidential spokeswoman said, according to Yonhap.

A South Korean official close to the investigation told CNN that malicious computer code spread through hacking caused the outages.

How the hackers got in and spread the code remains under investigation, and analysts are examining the malware, the official said.

U.S. flies B-52s over South Korea

Wednesday's attack is consistent with what North Korea has done in the past, said Adam Segal, a cybersecurity expert with the Council on Foreign Relations.

"It's happened before in similar circumstances where there have been tensions on the peninsula," Segal said.

South Korea has accused the North of similar hacking attacks before, including incidents in 2010 and 2012 that also targeted banks and media organizations.

The outages come amid heightened tensions on the Korean Peninsula, with the North angrily responding to a recent U.N. Security Council vote to impose tougher sanctions on Pyongyang after the country's latest nuclear test last month.

Last week, North Korea invalidated its 60-year-old armistice with the South. It has threatened to attack its neighbor with nuclear weapons and has also threatened the United States.

The armistice agreement, signed in 1953, ended the three-year war between North and South but left the two nations technically in a state of war.

The saber-rattling prompted the United States to deploy B-52 bombers to conduct high-profile flyovers of its South Korean ally and announce that it would deploy new ground-based missile interceptors on its West Coast against the remote possibility that North Korea could strike the United States with long-range weapons.

Under threat, South Koreans mull nuclear weapons

Last week, North Korea complained that it was the victim of "intensive and persistent virus attacks" from the United States and South Korea, according to KCNA, the official North Korean news agency.

Yonhap said Wednesday's outages affected three broadcasters, four banks and two insurance companies.

The three broadcasters -- KBS, MBC and YTN -- reported varying levels of trouble containing the virus. While the networks remained on the air, cable network YTN said editing equipment had been affected and it expected to experience broadcasting problems, Yonhap reported.

Computer networks stopped working entirely at three banks -- Shinhan, Nonghyup and Jeju -- around 2 p.m. Wednesday, Yonhap reported, citing the National Police Agency. Another financial institution, Woori Bank in Seoul, reported it was able to fend off a hacking attack about the same time.

The banks that were affected reported problems with a variety of systems, including Internet banking, ATMs and telecommunication services, and some branches stayed open late because of the slowdown, Yonhap said.

CNN's K.J. Kwon reported from Seoul, Jethro Mullen reported from Hong Kong and Michael Pearson wrote from Atlanta. Judy Kwon and Hilary Whiteman in Hong Kong contributed to this report.

ADVERTISEMENT
Part of complete coverage on
updated 9:54 PM EST, Tue December 23, 2014
A decade on from devastating 2004 Indian Ocean tsunami, the Red Cross' Matthias Schmale says that the lessons learned have made us safer.
updated 7:24 PM EST, Tue December 23, 2014
As soon as word broke that "The Interview" will hit some theaters, celebrations erupted across social media -- including from the stars of the film.
updated 1:44 PM EST, Tue December 23, 2014
Did a rogue hacker -- or the U.S. government -- cut the cord for the regime's Internet?
updated 8:06 PM EST, Tue December 23, 2014
Monaco's newborn royals, Princess Gabriella and Crown Prince Jacques Honore Rainier, posed for their first official photos with their parents.
updated 12:06 PM EST, Tue December 23, 2014
Tim Berners-Lee, the man credited with inventing the world wide web, gives a speech on April 18, 2012 in Lyon, central France, during the World Wide Web 2012 international conference on April 18, 2012 in Lyon.
What's next for the Internet? Acclaimed scientist Sir Tim Berners-Lee shares his insights.
updated 3:22 AM EST, Tue December 23, 2014
The United States and North Korea have long been locked in a bitter cycle of escalating and deescalating tensions. But the current cyber conflict may be especially hard to predict.
updated 4:00 PM EST, Mon December 22, 2014
A chilling video shows Boko Haram executing dozens of non-Muslims.
updated 6:34 AM EST, Mon December 22, 2014
New planes, new flight tests ... but will we get cheaper airfares?
updated 12:46 PM EST, Sun December 21, 2014
The killing of two cops could not have happened at a worse time for a city embroiled in a public battle over police-community relations, Errol Louis says.
updated 9:51 PM EST, Sun December 21, 2014
The gateway to Japan's capital, Tokyo Station, is celebrating its centennial this month -- and it has never looked better.
updated 11:21 AM EST, Sat December 20, 2014
Unicef has warned that more than 1.7 million children in conflict-torn areas of eastern Ukraine face an "extremely serious" situation.
updated 12:01 PM EST, Mon December 22, 2014
Each day, CNN brings you an image capturing a moment to remember, defining the present in our changing world.
Browse through images from CNN teams around the world that you don't always see on news reports.
ADVERTISEMENT