![]() ![]() It is relatively straightforward for extension developers to monetize their extensions through ad injection. “This practice can often degrade the user’s experience by showing pop-ups or other forms of annoying ads.” Aggressively inserting ads on almost every page the user visits.When a product is browsed on these pages, the extension sends the browsing session context to a third-party advertisement service, which retrieves similar or related products, and then shows these ads overlayed on the existing website content. Injecting ads on web pages related to online retailers (e.g.Injecting ads relevant to search terms, as we just saw.There are three main types of ad injection practices: The user searched for bags – the top highlighted region shows the google sponsored ads, the bottom (red) highlighted the ads injected by extension. Here’s an example of injected ads in a google search results page, placed there by the “Translate Selection” chrome extension. Finally, we found that ad-injecting extensions can make malvertising more detrimental, because some ad networks are unscrupulous on abusing the privileges that ad-injecting extensions offer. This is presumably because these ad networks and miscreants collude to conduct malvertising, or because miscreants effectively own these ad networks and use them for serving malicious ads. Second, in contrast to previous studies that found only a low fraction of malicious ads, we observed that some ad networks serve only malicious ads. We attribute this to the observation that popular websites partner with large reputable ad networks, whereas extensions utilize smaller ad networks that devote insufficient efforts to identifying and mitigating malicious advertisers. …compared to ads “naturally” published (without any browser extension intercession) by popular websites, ad-injecting extensions tend to serve a larger fraction of malicious ads. show that of the 292 Chrome browser extensions in their survey which inject ads, 56 of these participate in malvertising using 16 different ad networks, and a total user base of 602,417. Understanding malvertising through ad-injecting browser extensions– Xing et al., Some ad networks have started to offer browser extension developers an opportunity to monetise their work, and in this study Xing et al. ![]()
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