Which of the following programs collects email addresses of users and creates a mailing list?

Worms are self-replicating malware that spread across networks by exploiting vulnerabilities, their primary function is propagation rather than email address harvesting.

A stealth virus is designed to hide its presence from antivirus detection by intercepting system calls, not to collect email addresses.

A boot virus infects the master boot record or boot sector of a storage device to execute before the OS loads, which is unrelated to email harvesting.

A spambot is a type of malicious program that automatically crawls websites, forums, and other online sources to collect email addresses and compile them into mailing lists. These lists are then used to send unsolicited bulk email (spam). Spambots may also automate the sending process itself, making them a core tool in spam infrastructure.