Malware can be loosely divided into two main categories: programs that
spread or cause infection and programs that conceal and hide. Programs that
spread or contaminate effectively endeavor to duplicate themselves to different
PCs. Their primary intention is to do directions on new targets. Malware of
this sort incorporates:
Viruses
Worms
Other malware
stows away in the PC to complete its guidelines while staying away from
identification. Malware that tends to conceal includes:
Trojan horses
Rootkits
Spyware
