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Cyber attacks linked to North Korea, security experts claim

Cyber security researchers have found technical clues they said could link North Korea with the global WannaCry "ransomware" cyber attack that has infected more than 300,000 machines in 150 countries since Friday.
Symantec and Kaspersky Lab said on Monday some code in an earlier version of the WannaCry software had also appeared in programs used by the Lazarus Group, which researchers from many companies have identified as a North Korea-run hacking operation.
"This is the best clue we have seen to date as to the origins of WannaCry," Kaspersky Lab researcher Kurt Baumgartner told Reuters.
“At this time, all we have is a temporal link,” Eric Chien, an investigator at Symantec, told the New York Times. “We want to see more coding similarities to give us more confidence.’’
American officials said Monday that they had also seen the same similarities, the newspaper reported.
Both firms said it was too early to tell whether North Korea was involved in the attacks, which crippled the NHS on Friday and became one of the fastest-spreading extortion campaigns on record.
The cyber companies' research will be closely followed by law enforcement agencies around the world, including Washington, where US President Donald Trump's homeland security adviser said on Monday that both foreign nations and cyber criminals were possible culprits.
The two companies said they needed to study the code more and asked for others to help with the analysis. Hackers do reuse code from other operations, so even copied lines fall well short of proof.
US and European security officials told Reuters it was still too early to say who might be behind the attacks, but they did not rule out North Korea as a suspect.
The Lazarus hackers, acting for impoverished North Korea, have been more brazen in pursuit of financial gain than others, and have been blamed for the theft of $81 million from a Bangladesh bank.
They were also blamed for the attacks on Sony Pictures Entertainment - in retaliation for the comedy film “The Interview” - and on Polish banks in February. 
The North Korean mission to the United Nations was not immediately available for comment.

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