Thousands of web-connected CCTV cameras and webcams have been taken over by hackers to carry out cyber attacks on government department websites and online banks. The network of compromised cameras was uncovered by researchers at security firm Arbor Networks, who reported that large scale distributed denial of service (DDoS) attacks took down websites by flooding them with traffic. The botnet has been assembled by the notorious hacker collective Lizard Squad, best known for taking down the Xbox Live and Playstation gaming networks, as well as knocking North Korea’s Internet offline in 2014 using its LizardStresser DDoS tool.