VIRUS LIFE CYCLE

Viral life cycle in general, through 4 stages:

Dormant phase ( Phase Rest / Sleep )

In this phase the virus is not active.  The virus will be activated by a particular condition, such as: the date specified, the presence of other programs / execution of other programs, etc..  Not all viruses through this phase.

Propagation phase ( Phase Distribution )

In this phase the virus will unite himself to a program or to a place of storage media ( both hard drives, RAM etc ).  Each infected program will be the result of " cloning " of the virus ( depending on how the virus infects ).

Trigerring phase ( Phase Active )

In this phase the virus becomes active and this is also the trigger by some conditions such as the Dormant Phase.

Execution phase ( Phase Execution )

In this phase the virus is active before going to perform its function.  Such as deleting files, display messages.