- Find out how Trend Micro uses advanced technologies such as machine learning and artificial intelligence to provide a holistic, multi-layered defense to keeping systems safe.During the late 1990s and early 2000, macro viruses were the most prevalent viruses. Unlike other virus types, macro viruses are not specific to an operating system and spread with ease.Malvertisement - malware advertisement - is an infected online advertisement. These ads may be hosted in malicious as well as legitimate sites, and social networks. The use of infected ads allow cybercriminals to spread malware easily.Malware is a general category of malicious code that includes viruses, worms and Trojan horse programs.Managed detection and response (MDR) is an outsourced service that security vendors provide to augment organizations’ existing security infrastructures and address threats that can bypass traditional security controls.A memory-resident program has the ability to stay in the computer’s memory after execution and to continuously run. Typically backdoors stay in memory to await commands, as do . file infectors to infect files as they are opened.