Backdoor.Trojan is a detection name to identify malicious software programs that share the primary functionality of enabling a remote attacker to have access to or send commands to a compromised computer. Backdoor Trojan is a program that masks itself as another program. For example, a cracker may replace a free game from a website and hang his “hidden Trojan”. Backdoor trojans are not invincible. For instance, one of the easiest ways to detect and remove backdoor trojan malware is by using a reliable trojan removal tool.