The hazard has grown over the years, and flourished unabated through social networking sites, particularly because of bots', a type of malware that allows an attacker to gain complete control over the computer. "Bots allow hackers to take control of many computers at a time, and turn them into zombie' computers, which operate as part of a powerful botnet' to spread viruses, generate spam, and commit other types of online crime and fraud," explains Rishi Aggarwal, president of the Lonavla-based Anti-Hacking Anticipation Society (HANS). "These bots are like robots and operate on Artificial Intelligence. Once programmed, they work on their own, without the hacker's intervention."