### Comment:
What are some techniques used in drive-by downloads?

### REPLY:
Drive-by downloads exploit vulnerabilities in web browsers or plugins to automatically download and install malware without the user's consent or knowledge. This can be accomplished by injecting malicious code into legitimate websites or redirecting users to malicious websites that host exploit kits. These kits identify vulnerabilities in the user's browser or plugins and deliver malware payloads, infecting the victim's system.