List and briefly explain different modes of malware distribution.
There are four common modes of malware distribution. First, malware is often downloaded from the Internet. Users unintentionally download it to their hard drive, as malware designers disguise the malicious code, often within free software.
Second, Spam Emails distribute malware through unsolicited messages containing embedded hyperlinks or malicious attachment files. Similarly, Removable Storage Devices like pen drives and SSD cards act as carriers. Replicating malware infects these devices and transfers to other systems when they are plugged into a new computer.
Lastly, Network Propagation allows certain malware, such as Worms, to propagate from one computer to another through a network connection.
Explanation
The answer is derived directly from section 12.2.8 of the textbook context. It lists the four distribution channels: Internet downloads, spam emails, removable storage devices, and network propagation. The explanation briefly elaborates on each as described in the text, such as malware being disguised on the internet, unsolicited emails carrying attachments, storage media transferring malware between systems, and worms using network connections.