Activist hackers have infiltrated North Korea's official news website and its accompanying Twitter and Flickr feeds, posting unflattering images of leader Kim Jong-Un as a pig.
Uriminzokkiri, a China-based website that serves as one of North Korea's official propaganda outlets, was inaccessible and its companion feeds attacked and defaced.
On Twitter, the Uriminzokkiri account's profile photo was changed to one of a couple dancing the Tango, and a series of tweets read "Hacked" and "Tango Down".
The male dancer was wearing a Guy Fawkes mask — a trademark of the "Anonymous" hacktivist group.
The website's Flickr page showed a number of images, including one which simply read "We Are Anonymous" and a mock-up "Wanted" poster featuring Kim with a pig's nose and ears and a Mickey Mouse tattoo on his chest, recalling the imbecile Monkey Magic character "Pigsy".
Uriminzokkiri is best known for posting propaganda videos excoriating the United States and including images like the White House framed in the crosshairs of a sniper's rifle sight.
The Anonymous threat was clear: "We got all over 15k membership records of Uriminzokkiri.com and many more," read the message, according to a version obtained by the tech site BGR.
"First we gonna wipe your data, then we gonna wipe your badass dictatorship' government."
The cyber attack came amid soaring military tensions on the Korean peninsula.
North Korea, incensed at fresh UN sanctions and South Korea-US military drills, has issued a series of apocalyptic threats of nuclear war in recent weeks.
Yesterday Pyongyang moved a medium-range missile to its east coast and said it had received final approval for military action against the United States, possibly involving nuclear weapons.
Washington responded by strengthening its Pacific missile defences.
US Defense Secretary Chuck Hagel said Pyongyang's threats combined with its military capabilities represented a "real and clear danger" to the United States and its allies South Korea and Japan.
However, most experts think North is not yet capable of mounting a nuclear device on a ballistic missile capable of striking US bases or territory.
Australian Foreign Minister Bob Carr has said he will make a personal appeal for China to persuade North Korea to "ratchet down" its behaviour.
The Department of Defence has also made contingency plans to ensure the safety of its personnel in South Korea.
Sources: AAP, AFP, BGR