Updated May 15, 2017 9:57 p.m. ET
Cybersecurity researchers identified a digital clue connecting the global ransomware assault to previous cyberattacks by a group linked to North Korea.
The link involves a version of the software used in the latest attack, known as WannaCry, that was detected earlier this year and uploaded to an archive for security researchers.
Neel Mehta, a security researcher at AlphabetInc.’sGOOGL 0.43% Google unit, on Monday pointed out similarities between that earlier WannaCry variant and code used in a series of attacks that security specialists have attributed to the Lazarus group. Security experts say that hacking group carried…
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