The RoughTed malvertising campaign was rampant in June, causing problems for 28% of organizations around the world according to Check Point.

Malvertising is the name given to adverts that redirect users to malicious websites – sites hosting exploit kits that download malware and ransomware, phishing kits that gather sensitive information for malicious purposes or are used for a variety of scams.

Malvertising campaigns pose a significant threat because it is not possible to avoid seeing the malicious adverts, even if users are careful about the websites they visit. Malicious adverts are displayed through third party ad networks, which are used on a wide range of websites. Even well known, high traffic websites such as the BBC, New York Times, TMZ and MSN have all been discovered to have displayed malicious adverts. Cybercriminals only need to place their adverts with one advertising network to see their adverts displayed on many thousands of websites.

The RoughTed malvertising campaign was first identified in May, although activity peaked in June. By that time, it had resulted in infections in 150 countries throughout North and South America, Europe, Africa, Asia and Australasia.

It is sometimes possible to block malvertising using ad blockers, which prevent adverts from being displayed; however, the RoughTed malvertising campaign can get around these controls and can bypass ad blockers ensuring adverts are still displayed.

A web filtering solution can be useful at preventing categories of websites from being accessed that commonly host malicious adverts – sites hosting pornography for example – although due to the wide range of websites that display third party adverts, it would not be possible to eradicate risk. That said, an advanced web filtering solution such as WebTitan offers excellent protection by blocking access to the malicious sites rather than the malvertising itself.

Websites are rapidly added to blacklists when they are detected as being used for nefarious purposes. WebTitan supports blacklists and can block these redirects, preventing end users from visiting malicious sites when they click on the ads.

In addition to blacklists, WebTitan URL classification uses a multi-vector approach to deeply analyze websites. The URL classification uses link analysis, content analysis, bot detection and heuristic analysis to identify websites as malicious. These advanced techniques are used to block ad fraud, botnets, C2 servers, sites containing links to malware, phishing websites, spam URLs, compromised websites and malware distribution sites including those hosting exploit kits. The URL classification system used by WebTitan leverages data supplied by 500 million end users with the system continuously updated and optimized.

If you want to protect your organization from the actions of your end users and block the majority of online threats, contact the TitanHQ team today for further information on WebTitan and take a closer look at the web filtering solution in action.