Frankfurt — Two-thirds of those caught up in the past week’s global ransomware attack were running Microsoft’s Windows 7 operating system without the latest security updates, a survey for Reuters by security ratings firm BitSight found. Researchers are struggling to try to find early traces of WannaCry, which remains an active threat in hardest-hit China and Russia, believing that identifying "patient zero" could help catch its criminal authors. They are having more luck dissecting flaws that limited its spread. Security experts warn that while computers at more than 300,000 internet addresses were hit by the ransomware strain, further attacks that fix weaknesses in WannaCry will follow that hit larger numbers of users, with more devastating consequences. "Some organisations just aren’t aware of the risks; some don’t want to risk interrupting important business processes; sometimes they are short-staffed," said Ziv Mador, vice-president of security research at Israel’s SpiderLabs Tr...

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