From ArsTechnica:

Researchers have encountered a denial-of-service botnet that’s made up of more than 25,000 Internet-connected closed circuit TV devices.

The researchers with Security firm Sucuri came across the malicious network while defending a small brick-and-mortar jewelry shop against a distributed denial-of-service attack. The unnamed site was choking on an assault that delivered almost 35,000 HTTP requests per second, making it unreachable to legitimate users. When Sucuri used a network addressing and routing system known as Anycast to neutralize the attack, the assailants increased the number of HTTP requests to 50,000 per second.

The DDoS attack continued for days, causing the Sucuri researchers to become curious about the origins of the attack. They soon discovered the individual devices carrying out the attack were CCTV boxes that were connected to more than 25,500 different IP addresses. The IP addresses were located in no fewer than 105 countries around the world.

“It is not new that attackers have been using IoT devices to start their DDoS campaigns,” Sucuri CTO and founder Daniel Cid wrote in a blog post, using the abbreviation for Internet of things. “However, we have not analyzed one that leveraged only CCTV devices and was still able to generate this quantity…

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