Which one is the harmful software?

Norton
Avast
Kaspersky
Dark avenger

Dark Avenger

Explanation:

Dark Avenger was a pseudonym of a computer virus writer from Sofia, Bulgaria. He gained considerable popularity during the early 1990s, as some of his viruses spread not only nationwide but across Europe as well, even reaching the United States and Australia.

uwu pennywise or ronald

answer; i believe that the correct answer is ( rivers);