### Comment:
What are some common techniques used in malware propagation?

### REPLY:
One common technique used in malware propagation is by exploiting software vulnerabilities, such as zero-day exploits. Another method is to use botnets, which are networks of compromised computers that can be controlled remotely to distribute malware. Additionally, attackers can use spam emails with malicious attachments or links, or infect websites with malicious code to spread malware to unsuspecting visitors.