Explanation/Notes: One method used by attackers to install malicious code is to place programs onto a floppy or CD-ROM and label it with something very enticing (for example, "Personnel Payroll Data—Confidential"). They then drop several copies in areas used by employees. If a single copy is inserted into a computer and the files on it opened, the attacker's malicious code is executed. This may create a backdoor, which is used to compromise the system, or may cause other damage to the network.