Hackers steal data for 12 million customers at South Korean phone giant
March 6, 2014 -- Updated 1005 GMT (1805 HKT)
South Korea has already been rocked by one major leak of personal information this year.
- Hackers steal details for 12 million customers of South Korean phone giant
- Bank details, home addresses obtained for three-quarters of KT Corp's users
- Details used by an accomplice to sell cell phones posing as KT representative
- Second major data leak in South Korea since January
(CNN) -- Police have arrested two people in connection with a cyber-attack that yielded personal details for 12 million customers of one of South Korea's biggest phone companies.
One of the suspects, identified only by the surname Kim, used his own customized hacking program to break into the computer system used by KT Corp, Incheon Metropolitan Police Agency Commissioner Lee Sang-Won said in a statement obtained by CNN Thursday.
Kim, whom police said was 29 year old, accessed bank details, home addresses and employment information for three-quarters of KT's 16 million registered users. This data was sold on to a 37-year-old man identified only as Park. The owner of a telemarketing business, Park used this information to sell cell phones posing as a KT representative, police said.
The two made 11.5 billion won (US$10.8 million) from the scheme, which dated back to February 2013, police added.
A third person initially implicated in the case was released.
The investigation is now expanding to other hacking activities and other cell phone sales stores.
KT said in a statement that it would actively cooperate with the police investigation to "minimize the damage to its customers," and "figure out the route of information leakage."
Credit card scam
In January this year, the personal data for 20 million South Korean credit card customers was stolen by a worker at the Korea Credit Bureau -- a company that offers risk management and fraud detection services.
The worker, who had access to various databases at the firm, is alleged to have secretly copied data onto an external drive over the course of a year and a half.
Clients of three Korean companies -- KB Kookmin Bank, Lotte Card and Nonghyup Bank -- were hardest hit by the data theft.
Following this leak, financial regulators have been working to revise legislation to beef up the protection of personal information, the Yonhap news agency reported.
Today's five most popular stories
Part of complete coverage on
October 28, 2014 -- Updated 1443 GMT (2243 HKT)
A captured fighter tells CNN's Ivan Watson: "They gave us drugs... that made you go to battle."
October 29, 2014 -- Updated 1331 GMT (2131 HKT)
A terminally ill woman who plans to take her own life checks off the last item.
October 30, 2014 -- Updated 2340 GMT (0740 HKT)
In a plot straight out of Hollywood, federal agents gain access to a suspected Triad boss' Vegas hotel room by pretending to fix the Internet connection.
October 31, 2014 -- Updated 0434 GMT (1234 HKT)
Was it only black and Latino men who harassed a woman in NYC? The filmmaker has found himself in a race controversy.
October 31, 2014 -- Updated 0317 GMT (1117 HKT)
The history of human rights often overlooks the struggles of gay people. This must change.
October 30, 2014 -- Updated 0115 GMT (0915 HKT)
Armed with Kalashnikovs and chanting for the dead comrades, women are among ISIS' most feared enemies. They are fighting for their families -- and now they are getting U.S. help.
October 28, 2014 -- Updated 1246 GMT (2046 HKT)
Lere Mgayiya put his best foot forward and set up a shoe-shine firm after his career plans fell flat.
October 30, 2014 -- Updated 0528 GMT (1328 HKT)
One Chinese drone manufacturer wants to take away the warmongering stigma of "drones."
October 30, 2014 -- Updated 0312 GMT (1112 HKT)
Sketcher Luis Simoes is traveling the world -- slowly. And he's packed his sketchbook.
October 28, 2014 -- Updated 2043 GMT (0443 HKT)
European states help North Korea's brutal treatment of its people by allowing luxury goods like cars and cognacs to evade sanctions, two experts say.
October 24, 2014 -- Updated 0345 GMT (1145 HKT)
Chinese leaders want less odd architecture built in the country.
October 30, 2014 -- Updated 1106 GMT (1906 HKT)
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.