SEOUL, July 16 (Xinhua) -- South Korea on Tuesday confirmed that the Democratic People's Republic of Korea (DPRK) was behind the June 25 cyber attack that led to shutdown of websites of the presidential office and other government agency.
The series of cyber attacks that happened from June 25 to July 1 coincided with the DPRK's past hacking patterns such as the March 20 cyber attack, the Ministry of Science, ICT and Future Planning said at a press briefing.
On June 25, websites of the presidential office Cheong Wa Dae and the Office of Government Policy Coordination were hacked by cyber attackers. At that time, the presidential office homepage showed a message in red letters of "Great leader Kim Jung-un." Kim Jung-un is the DPRK's leader.
The attackers caused confusion in their identification by claiming that they were part of the hacktivist group Anonymous. On June 25, another posting was displayed at the websites with a message of "We Are Anonymous."
Some South Korean ministries were in troubles of accessing their homepages, while other private institutions such as some local newspapers suffered a hacking on their homepages.
Based on 82 malicious codes used for the hacking and internet access records collected, the ministry found that Internet Protocol (IP) address linked to the DPRK was spotted at the June 25 and July 1 cyber attacks.
Character strings of malware, ways of returning back the results of monitoring attacks and methods of deleting computer files were the same as those identified in the March 20 cyber attack, the ministry said.
The malware used in the June 25 attack against homepages and in distributed denial-of-service (DDoS) attacks was confirmed to be the variant of malicious codes spotted at the March 20 cyber attack, the ministry added.
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