1. A method for monitoring an electronic device to detect infection by unwanted software, the method comprising: receiving parameters and inserting the parameters into artificial sensitive information using a software agent running on the electronic device, wherein the parameters include identifying information for the electronic device; performing, using the software agent running on the electronic device, a login session using the artificial sensitive information; and monitoring, at a computer hardware network gateway, network transmissions of the electronic device unrelated to the login session to detect a transmission of the artificial sensitive information to another electronic device based on a comparison of information included in a network transmission to the artificial sensitive information to determine the existence of unwanted software on the electronic device based on the information identifying the electronic device being included in the transmission of the artificial sensitive information.