Viruses, Trojans, and Worms
When asking, how does cyber crime happen, few think of viruses, trojans, and worms, though most people are familiar with these. These programs can do a wide variety of damage, from simply be annoying to stealing a person's information or even completely destroying a computer network.
A worm is a type of harmful program that makes several copies of itself. It can copy itself from using an email or a similar mode of transport, or copy itself from one disk drive to a different one. Worms can compromise the security and significantly damage a computer.
A virus is a type of code or harmful program that replicates and/or infects another partition sector, program, document, or boot sector that supports macros through attaching itself or inserting itself to that medium. Many viruses can cause significant damage to a computer.
A Trojan Horse is a type of harmful program that neither copies itself or replicates itself, but compromises the security or causes damage to a computer. In most cases, a Trojan Horse is sent via email, and when opened or downloaded, it infects the computer.