LXer: South Korea Bank Hacks: 7 Key Facts
 

Published at LXer:

The online attacks launched against multiple banks, insurance companies and television stations in South Korea Wednesday knocked targeted networks offline. But according to security experts, the attacks were relatively unsophisticated and would have required little infrastructure or expertise to launch.

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Maybe they were very sophisticated and only left an impression that novices did it?

The attack was not from China:
http://slashdot.org/story/13/03/25/0...of-cyberattack
they made it seem like it was from China for political effect.