Malvertising

Common card · No. 345470

Malvertising (a portmanteau of "malicious software (malware) advertising") is the use of online advertising to spread malware. It typically involves injecting malicious or malware-laden advertisements into legitimate online advertising networks and webpages. Because advertising content can be inserted into high-profile and reputable websites, malvertising provides malefactors an opportunity to push their attacks to web users who might not otherwise see the ads, due to firewalls, more safety precautions, or the like. Malvertising has been described as "attractive to attackers because it 'can be easily spread across a large number of legitimate websites without directly compromising those websites'." Malvertising can be extremely hard to combat because it can quietly work its way into a webpage or webpage advertisement and spread unknowingly: "The interesting thing about infections delivered through malvertising is that it does not require any user action (like clicking) to compromise the...

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