DIRECT ACTION VIRUS

A direct action virus is a type of file infector virus that works by attaching itself to an .exe or .com file when installed or executed. Once this occurs, the virus can spread to other existing files and can render them inaccessible

POLYMORPHIC VIRUSES

Polymorphic viruses are complex file infectors that can create modified versions of itself to avoid detection yet retain the same basic routines after every infection. To vary their physical file makeup during each infection, polymorphic viruses encrypt their codes and use different encryption keys every time.

FILE INFECTOR VIRUS

File infectors are malware capable of infecting files to spread on other systems, removable devices, and the network. To do this routine, they seek out and copy their malicious code to certain files (. EXE, . DLL

MULTIPARTITE VIRUS

A multipartite virus is a type of fast-acting malware that attacks a device's boot sector and executable files simultaneously. Multipartite viruses are often considered more problematic than traditional computer viruses due to their ability to spread in multiple ways.

MACRO VIRUS

A macro virus is a computer virus written in the same macro language as the software it infects — common victims include Microsoft Excel and Word. Because they target software rather than systems, macro viruses can infect any operating system. So a macro virus can infect a PC or Mac.