Malicious software on the Internet has more than doubled in the last year and it's expected to continue to increase as hackers become more and more sophisticated in the techniques they use to deliver viruses, spyware, worms, Trojans and adware to the Internet.
According to a recent report by Sophos, this growth in malware on the web is due to a new movement whereby hackers place malware on websites rather than using email attachments. Sophos estimates an average of 5,000 new infected web pages are unleashed onto the Internet everyday.
These are not hacker websites. The majority of them, 70% or more are legitimate sites that have been hacked and infected by cybercriminals. Three recent examples of this trend show how popular sites can become powerful spyware targets for hackers:
1. In November of 2006, hackers uploaded an article to the German edition of Wikipedia including a link to fix what the hackers called a new version of the "Blaster worm". However, this fix was actually malicious code. Wikipedia removed the page as soon as they discovered the security issue. But, the hackers used this code to send spam pointing to the archived Wikipedia page and continued infecting users' computers.
2. In December of 2006, hackers used the Myspace social networking site to infect hundreds of user profiles with a worm. This malware replaced legitimate links in the users' profiles with links to phishing sites, where Myspace users were asked to submit their usernames and passwords. The phishing worm also embedded itself into the Myspace victims' user profiles.
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