To function, viruses need a host file (e.g., a Word document) or a host program (e.g., that free PDF splitter you downloaded).
Worms and viruses differ in two main ways: how they spread or “replicate” and their level of autonomy. Knowing how they work can limit the damage of a malware attack sooner and help avoid infection altogether. Two of the most common forms of malware are worms and viruses. Most types of malicious software (aka malware) work differently, but all have the same function: to install unwanted software on your computer or network for malicious purposes ranging from simple annoyance to corporate espionage. Studies put the global cost of ransomware attacks for 2017 between 1 and 3 billion dollars.
Despite their fictional-sounding names, the monetary damage these types of malware can cause to computers and data is very real. Worms, viruses, bots, oh my! Such names sound less like monikers for malicious software than characters in a sci-fi novel.
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