Some of the leading website’s in South Korea have been hit by a series of cyber attacks.

Those websites hit include Government ministries, the National Assembly, major banks, military headquarters and US Forces in Korea.

The victims are believed to have been hit with injected malware into two peer-to-peer file sharing websites.  These attacks are similar to those that targeted South Korean websites back in July 2009.

29 institutions were affected by Distributed Denial-of-Service attacks (DDoS); making a site unavailable by overloading it with data.

South Korean security firm AhnLab estimates that up to 11,000 personal computers had been infected by malware and recruited for attack.  They are now distributing free software to clean PCs.

The previous attacks against South Korea in 2009 were blamed on neighbours North Korea, although no official link has yet been proven.