Malware authors exploited the assassination of former Pakistani Prime Minister Benazir Bhutto to spread malware. Attackers set up fake blogs and webpages, which claimed to have rare video of Bhutto's death.

What is it?A computer's DNS settings help it map hostnames to IP addresses. A computer can be reconfigured to use these malicious DNS servers through malware or a malicious website's script code. Windows systems are most often at risk, although recently DNSChanger attacks have affected OS X and Linux, too.

Brian Cohen has been named president and chief executive officer of Steelbox Networks

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