While this was not particularly malicious, it didn't take long for the intent of these viruses to change. The creativity of the hackers is unmatched. Even more dangerous than viruses are programs known as Trojans and Worms. Trojans have been blamed for everything from benign nuisances, to changing files, to reformatting entire hard drives. Also causing problems are Worms, which are specialized computer network creatures.
Viruses move from file to file, disk to disk.
Worms, on the other hand, spread from computer to computer over networks, usually ignoring individual files. Other risks involve intellectual property, the theft of information by outsiders, trademark and patent violations, or copyright infringement. And the danger doesn't always come from hackers outside of the organization. In fact, disgruntled employees have become the greatest source of concern for risk managers seeking to avoid a technological assault. These risks are difficult enough to manage even when no one is tampering with your site.