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“Trojan horse” program will be tried every time to hide themselves, main ways: in the task bar hide themselves, as long as set Form of the Visible property to False, ShowInTaskBar set to False, the program is running will not appear in the task bar. Invisible in Task Manager: The program is set to “system service” can easily camouflage himself. Of course, it will quietly start, you certainly would not expect to start it each time after a user click on “Trojan horse” icon to run the services side, “Trojan horse” will be loaded automatically each time when a user starts the server, the method of windows boot automatically loads the application “Trojan horse” will use, for example: start the group, win.ini, system.ini, registry all are “Trojan horse” a good hiding place. The following is about how “Trojan horse” auto-loaded.

To learn more about DLL Trojans, you must know that What does “DLL” mean, a few years ago DOS system popular at that time, writing process is a complicated matter, because each program code are independent, and sometimes in order to to achieve a function, we must do a lot of code to write, and later with the development of programming techniques, programmers have put a lot of collection of commonly used code (generic code) into a separate file and this file is called “Library” ( Library), in the writing process, when this library file into the compiler, … … … DLL Trojan Trojan is to achieve a function of the code, plus some special code written DLL file, export-related API, this is just an ordinary DLL, but this DLL is a Trojan horse to carry a full functionality, this is the concept of DLL Trojans. Some people may ask, since the same code can be achieved Trojan functionality, then the program can be done directly, why superfluous written in it to DLL? This is to hide, because the DLL is directly linked to its program in a process and will not create another process, so relative to the traditional EXE Trojan, it is difficult to be found.