While overall click fraud dipped during Q1 2009, down 17% from Q4 2008 and 16% year-over-year, the fraud traffic from malicious scripted programs increased this year, according to Click Forensics. This type of malware exists as Javascript programs that execute upon a page view or site visit. Protection against this level of threat is often managed under the radar of advertisers using digital display ads. Networks and publishers working with third-party service providers often bear the brunt of ensuring traffic is legitimate and ads are correctly counted.