Cyber criminals have been delivering malware through online display ads for years, but they appear to be making headway with a new distribution method: video advertisements.
Both methods of attack, known as malvertising, can have a broad impact and are a major headache for the ad industry. A single malicious advertisement, distributed to several highly trafficked sites, can expose tens of thousands of computers to malware in a short time.
Some ad networks and publishers have taken steps to vet their ads more thoroughly, but criminals are constantly on the lookout for weaknesses.
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