The “Wanna Cry” computer worm that affected some 300,000 computers in more than 150 countries earlier this year was an intentional cyber-attack orchestrated by Kim Jong Un’s North Korean regime, U.S. and British defense officials claimed this week.  The attack, which caused more than a billion dollars in damage worldwide, was reportedly a part of an effort to draw funding for the regime in the face of tightening sanctions implemented by the United States and other nations.

“The attack was widespread and cost billions, and North Korea is directly responsible,” Tom Bossert, homeland security adviser to President Donald Trump, wrote in a piece published on Monday night in the Wall Street Journal.

“North Korea has acted especially badly, largely unchecked, for more than a decade, and its malicious behavior is growing more egregious,” Bossert wrote. “WannaCry was indiscriminately reckless.”

British officials echoed this conclusion on Monday, claiming that other nations, including Australia, Canada and New Zealand have also established that the “WannaCry” worm originated in North Korea.