The recent Heartland Payment System (HPS) breach illustrates the related risks. The Verizon Business 2009 Data Breach Investigations report, malware contributed to nearly one-third of data breaches The report noted that malware distribution has evolved from self-replicating emails and network worms [to] emphasize stealth and smaller, more directed distributions This signals a shift from annoyance attacks toward targeted infections designed to gather intelligence on, or take control of, a target. The enterprise must draft security policies and procedures that take this risk into account.”]
Source: https://www.csoonline.com/article/2137075/building-a-successful-anti-malware-strategy.html