Article detailing what the term "Infection vector" means in relation to malware investigations.
Infection Vector
An infection vector refers to the origin of the malware. Did the malware arrive via an Internet connection or did it infect your computer following access of a file from a network share or from the connection of a USB storage device and so on.
Malware that infects your computer from an Internet connection usually arrives following access of a suspect email containing an infected attachment or link to an exploit server. Your computer may also be infected following access of a compromised website.
Your computer can also be infected following the downloading of files and programs from file sharing networks or unverified web resources.