Cybercriminals have been delivering malware through online display ads for years. But they appear to be making headway with a new distribution method: video ads. An attack detected about two weeks ago shows how cybercriminals are showing more interest in creating malicious video ad. Video ads are an attractive target for hackers because they’re harder to vet for quality, expert says. A single malicious advertisement, distributed to several highly trafficked sites, can expose tens of thousands of computers to malware in a short time.”]