The attacks were not sophisticated,

The attacks were not sophisticated, but were
widespread and prolonged, succeeding in slowing
down most of the U.S. sites and forcing several South
Korean sites to stop operating. North Korea or
pro-North Korean groups were suspected to be
behind the attacks, but the Pyongyang government
denied any involvement.

Hasil (Bahasa Indonesia) 2:

Serangan itu tidak canggih, tetapi
meluas dan berkepanjangan, berhasil dalam memperlambat
turun sebagian besar situs AS dan memaksa beberapa Selatan
situs Korea untuk berhenti beroperasi. Korea Utara atau
kelompok pro-Korut yang diduga menjadi
serangan balik, namun pemerintah Pyongyang
membantah terlibat.