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Home News Asia

South Korea: Chinese Address Source of Attack

Sam Kim by Sam Kim
March 21, 2013
in Uncategorized
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South Korea: Chinese Address Source of Attack

North Korean soldiers attend military drills in this picture released by the North’s official KCNA news agency in Pyongyang on Wednesday. (Photo: Reuters/KCNA)

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SEOUL — A Chinese Internet address was the source of a cyberattack on one company hit in a massive network shutdown that affected 32,000 computers at six banks and media companies in South Korea, initial findings indicated Thursday.

It’s too early to assign blame—Internet addresses can easily be manipulated and the investigation could take weeks—but suspicion for Wednesday’s shutdown quickly fell on North Korea, which has threatened Seoul and Washington with attack in recent days because of anger over UN sanctions imposed for its Feb. 12 nuclear test.

South Korean regulators said they believe the attacks came from a “single organization,” but they’ve still not finished investigating what happened at the other companies.

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Experts say hackers often attack via computers in other countries to hide their identities. South Korea has previously accused North Korean hackers of using Chinese addresses to infect their networks.

Seoul believes North Korea runs an Internet warfare unit aimed at hacking US and South Korean government and military networks to gather information and disrupt service.

The attack Wednesday caused computer networks at major banks and top TV broadcasters to crash simultaneously. It paralyzed bank machines across the country and raised fears that this heavily Internet-dependent society was vulnerable. On Thursday, only one of the attacked banks, Shinhan, was fully online, officials said.

A Chinese address created the malicious code in the server of Nonghyup bank, according to an initial analysis by the state-run Korea Communications Commission, South Korea’s telecom regulator.

Investigators are analyzing the log-in records and the malicious code collected from the infected servers and computers. It could take at least four to five days for the infected computers to recover fully. Experts say the entire investigation could take weeks.

South Korean regulators have also distributed vaccine software to government offices, banks, hospitals and other institutions to prevent more outages.

In an indication of the high tension on the Korean Peninsula, South Korean media reported that North Korea sounded air-raid warnings in radio broadcasts Thursday morning as part of military drills.

The network paralysis took place just days after North Korea accused South Korea and the US of staging a cyberattack that shut down its websites for two days last week. Loxley Pacific, the Thailand-based Internet service provider, confirmed the North Korean outage but did not say what caused it. South Korea denied the allegation.

The attack may have also extended to the United States. Greg Scarlatoiu, executive director of the US-based Committee for Human Rights in North Korea, said he discovered early Wednesday that their website had been hacked. They have yet to establish who was behind it but strongly suspect it came from North Korea.

Several of the committee’s publications, including lengthy reports with satellite imagery of North Korean prison camps, had been removed, along with biographies of their staff and board, and their policy recommendations to the Obama administration.

The South Korean shutdown did not affect government agencies or sensitive targets such as power plants or transportation systems, and there were no immediate reports that bank customers’ records were compromised, but the disruption froze part of the country’s commerce.

Some customers were unable to use the debit or credit cards that many rely on more than cash. At one Starbucks in downtown Seoul, customers were asked to pay for their coffee in cash, and lines formed outside disabled bank machines.

Broadcasters KBS and MBC still didn’t have full computer use on Thursday, but the shutdown did not affect TV broadcasts.

The YTN cable news channel also said the company’s internal computer network was paralyzed. Footage showed workers staring at blank computer screens.

KBS employees said they watched helplessly as files stored on their computers began disappearing.
Last year, North Korea threatened to attack several news companies, including KBC and MBC, over their reports critical of children’s’ festivals in the North.

“If it plays out that this was a state-sponsored attack, that’s pretty bald faced and definitely an escalation in the tensions between the two countries,” said James Barnett, former chief of public safety and homeland security for the US Federal Communications Commission.

An ominous question is what other businesses, in South Korea or elsewhere, may also be in the sights of the attacker, said Barnett, who heads the cybersecurity practice at Washington law firm Venable.

“This needs to be a wake-up call,” he said. “This can happen anywhere.”

An official at the South’s Korea Communications Commission said investigators speculate that malicious code was spread from company servers that send automatic updates of security software and virus patches.

The shutdown raised worries about the overall vulnerability to attacks in South Korea, a world leader in broadband and mobile Internet access. Previous hacking attacks at private companies compromised millions of people’s personal data. Past malware attacks also disabled access to government agency websites and destroyed files in personal computers.

Seoul blames North Korean hackers for several cyberattacks in recent years. Pyongyang has either denied or ignored those charges. Hackers operating from IP addresses in China have also been blamed.

In 2011, computer security software maker McAfee Inc. said North Korea or its sympathizers likely were responsible for a cyberattack against South Korean government and banking websites earlier that year. The analysis also said North Korea appeared to be linked to a massive computer-based attack in 2009 that brought down US government Internet sites. Pyongyang denied involvement.

“North Korea has almost certainly done similar attacks before,” said Tim Junio, a cybersecurity fellow at Stanford University’s Center for International Security and Cooperation. “Part of why this wasn’t more consequential is probably because South Korea took the first major incident seriously and deployed a bunch of organizational and technical innovations to reduce response time during future North Korea attacks.”

South Korea has created a National Cybersecurity Center, a national monitoring sector and a Cyber Command modeled after the US Cyber Command. Junio said South Korea’s major antivirus firms also play a large role in stopping hacking attacks.

The shutdown comes amid rising rhetoric and threats of attack from Pyongyang over the UN sanctions. Washington also expanded sanctions against North Korea this month in a bid to cripple the government’s ability to develop its nuclear program.

North Korea has threatened revenge for the sanctions and for ongoing US-South Korean military drills, which the allies describe as routine but which Pyongyang says are rehearsals for invasion.

Last week, North Korea’s Committee for the Peaceful Reunification of Korea warned South Korea’s “reptile media” that the North was prepared to conduct a “sophisticated strike” on Seoul.

Lim Jong-in, dean of Korea University’s Graduate School of Information Security, said North Korea was probably responsible for Wednesday’s attack.

“Hackers attack media companies usually because of a political desire to cause confusion in society,” he said. “Political attacks on South Korea come from North Koreans.”

Your Thoughts …
Sam Kim

Sam Kim

The Associated Press

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