The injection of malicious or malware-laden advertisements into legitimate online banner advertising networks. Banners of popular websites, such as The New York Times, the BBC and Yahoo, have all been the targets of malvertising. Just because a website might seem reputable, it does not mean a malicious actor cannot use a banner advertising network to propagate malware.

The injection of malicious or malware-laden advertisements into legitimate online banner advertising networks. Banners of popular websites, such as The New York Times, the BBC and Yahoo, have all been the targets of malvertising. Just because a website might seem reputable, it does not mean a malicious actor cannot use a banner advertising network to propagate malware.