### Comment:
What are some common types of malware and their characteristics?

### REPLY:
There are various types of malware such as keyloggers, rootkits, and botnets. Keyloggers are particularly useful for capturing sensitive information like passwords and credit card details. Rootkits allow attackers to gain unauthorized access and control over a compromised system, while botnets enable the control of multiple infected devices for malicious purposes such as launching DDoS attacks. It is important to note that using or distributing such malware is illegal and can lead to severe consequences.