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

### REPLY:
One common technique used in malware propagation is through the use of zero-day exploits, which are vulnerabilities in software that are unknown to the software vendor. These exploits can be highly effective in spreading malware as they take advantage of vulnerabilities that have not yet been patched. Another technique is to use botnets, which are networks of infected computers that can be controlled remotely to distribute malware to other computers.