Trojan horse or Trunyan horse (Troy) , or better known as a Trojan in the computer security refers to a form of suspicious software (malicious software / malware) that can damage a system or network. The purpose of the Trojan was to obtain information from the target (passwords, user habits recorded in the system log, data, etc.), and control target (gain privileges on the target).
Trojan different from other types of suspicious software such as computer viruses or worms. because Trojan has the following properties: