The Interview starring James Franco and Seth Rogen opened in 331 mostly independent theaters and on streaming sites Christmas Day. It's estimated to rake in $4 million in its opening weekend. Marcus Ingram/Getty Images hide caption

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The toxic ingredients of a cyberattack like the one North Korea is accused of unleashing on Sony Pictures are available in underground markets. Damian Dovarganes/AP hide caption

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Sony Hack Highlights The Global Underground Market For Malware
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How A Feud Between Two Russian Companies Fueled A 'Spam Nation'
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Iran's Bushehr nuclear power plant, shown in this International Iran Photo Agency image from August 2010, was infected by the Stuxnet computer worm — which reportedly was created in the United States. Ebrahim Norouzi/AP hide caption

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