Fewer than 10 US organizations have reported attacks to the Department of Homeland Security since Friday, a USA official told reporters on Tuesday.
As some expert cyber security researchers from the U.S. said, there have been before also that Sony was hack due to the movie they were portraying the North Korean leader Kim Jong-un, but that was in 2014, and only affected one company.
An worldwide manhunt was underway as private-sector researchers and government investigators alike tried to stamp out new versions of WannaCry while scouring for clues pointing to the authors of the original virus, who are "potentially criminals or foreign nation-states", said Tom Bossert, President Donald Trump's homeland security adviser. According to Mehta's discovery, the "Lazarus Group" that works on behalf of North Koreans may be behind the attack as the hacking group has, in the past, used the same coding and tools as were used in "WannaCrypt" - the software used in the current hacking into the Microsoft operating software, the BBC reported on Tuesday.
Experts are questioning whether North Korea was behind the WannaCry cyberattack attack, saying it doesn't fit the pattern of previous hacks blamed on Pyongyang.
FireEye Inc, another cyber security firm, said it was also investigating, but was cautious about drawing a link to North Korea. Private researchers reached a similar conclusion.
USA and European security officials told Reuters on condition of anonymity that it was too early to say who might be behind the attacks, but they did not rule out North Korea as a suspect.
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In 2016, the North Korean government stole no less than $81 million from Bangladesh' Central Bank.
North Korea has denied being behind the Sony and banking attacks.
"I believe that China will stay true to that and we will come together on how we're going to do that", she said.
"We may not see the real picture yet, as companies are not mandated to disclose security breaches to authorities in Malaysia", said LE Global CEO Fong Choong Fook. "In one of the cases, the attack was traced back to early April".
Specially, no United States federal systems are affected, he said.