Malware threatens computer users by stealing personal data or causing damage. Common types include ransomware, which encrypts files and demands ransom for their decryption; Spyware, tracking online activity and stealing personal information; Adware, displaying intrusive ads and generating illicit revenue; Worms, replicating and spreading without permission potentially for malicious purposes; Trojans, malicious applications masked as legitimate ones; and botnets, networks of compromised computers used for illegal activities. Each type enters the system unknowingly to the user.

Malware Analysis Market Segmentation Analysis by Application, – openPR.com
Malware Analysis Market Segmentation Analysis by Application, openPR.com