Here are scenarios of parasitism in the animal kingdom, compared to Cyber attacks. In these cases, we look at a parasitic wasp as the hacker, and its host as the targeted IT Infrastructure.
The 1st would be akin to what usually happens when an insecure IT Infrastructure is hit by ransomware, and the 2nd equivalent to a system compromise...
Ransomware attack
System compromise
(Needless to say, we're compelled to take security a lot more seriously than they do... 
)
