Security Stronghold threat catalog

The term "Trojan horse" or "trojan" came from the story of capturing Troy by ancient Greeks. A malicious program related to trojan masks itself as a valid program and in contrast to viruses doesn’t create multiple instances of itself. Trojan itself is responsible to unauthorized access to the host machine. Hiding behind useful programs trojan performs undisclosed malicious actions. Trojan is the two-faced Janus which makes evil under the mask of good.

There are some functional types of trojans subject to its malicious actions:

Downloader/dropper,
Denial-of-service attack (DoS),
Data Destruction,
Remote Access,
Server Trojan (Proxy, FTP , IRC, Email, HTTP/HTTPS, etc.),
Disable security software.

To get rid of all kinds of trojans you may download Stronghold AntiMalware and be sure in your protection.