新电脑病毒扑面而来，Petya到底是什么？
<p><span word="How">How</span> <span word="did">did</span> <span word="this">this</span> <span word="begin">begin</span>?</p><p>源头在哪？</p><p><span word="The">The</span> <span word="Petya">Petya</span> <span word="ransomware">ransomware</span> <span word="worm">worm</span> <span word="began">began</span> <span word="spreading">spreading</span> <span word="Tuesday">Tuesday</span> <span word="morning">morning</span> <span word="with">with</span> <span word="a">a</span> <span word="fake">fake</span> <span word="software">software</span> <span word="update">update</span> <span word="that">that</span> <span word="was">was</span> <span word="pushed">pushed</span> <span word="out">out</span> <span word="to">to</span> <span word="businesses">businesses</span> <span word="and">and</span> <span word="other">other</span> <span word="enterprises">enterprises</span> <span word="in">in</span> <span word="Ukraine">Ukraine</span>. <span word="The">The</span> <span word="software">software</span> <span word="concerned">concerned</span>, <span word="called">called</span> <span word="MEDoc">MEDoc</span>, <span word="is">is</span> <span word="a">a</span> <span word="financial">financial</span>-<span word="monitoring">monitoring</span> <span word="application">application</span> <span word="that">that</span> <span word="all">all</span> <span word="businesses">businesses</span> <span word="in">in</span> <span word="Ukraine">Ukraine</span> <span word="must">must</span> <span word="have">have</span> <span word="installed">installed</span>.</p><p><span word="Petya">Petya</span>勒索软件蠕虫于本周二早上开始传播，它假借软件更新，强制推送给乌克兰企业。涉事软件叫做<span word="MEDoc">MEDoc</span>，是所有乌克兰企业都必须安装的一个财务监控应用程序。</p>
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