Any attempt to violate the security perimeter of a logical environment. An attack can focus on gathering information, damaging business processes, exploiting flaws, monitoring targets, interrupting business tasks, extracting value, causing damage to logical or physical assets or using system resources to support attacks against other targets. Cyberattacks can be initiated through exploitation of a vulnerability in a publicly exposed service, through tricking a user into opening an infectious attachment, or even causing automated installation of exploitation tools through innocent website visits. (Also known as drive-by download.)