An attack always harms affected companies and institutions, regardless of which method is chosen. Victim organizations still suffer from the consequences even years later. It is therefore extremely important to have effective protection.
Form spam ties up your employees who check the incoming messages, thereby reducing their productivity. It is hard to predict what the financial damages will be if malware gets into your systems.
Infiltrating malware such as Trojans can hide in your systems and spy out sensitive information for years without being noticed.
If attackers encrypt or delete your data, you will no longer be able to access it. The consequences can be devastating.