California-based security firm Proofpoint has discovered that hackers used smart Internet-connected home appliances to deliver malicious emails in what’s considered to be the first proven attack that involves the “Internet of things,” The Sydney Morning Herald reports. According to the company, during December 23 and January 6, “waves of malicious email, typically sent in bursts of 100,000, three times per day, targeting enterprises and individuals worldwide” were seen. Of those, more than 25% originated from Internet of things devices that were hacked for the purpose, instead of traditional “laptops, desktop computers or mobile devices.” No more than 10 emails were initiated from the same device, which made the attack all the more difficult to spot. The botnet, which included Smart TVs