counterattack[ko̵unt′ər ə tak′; for v., also ko̵unt′ər ə tak′]
counterattack definition by Webster's New World
counterattack definition by American Heritage Dictionary
counterattack - Computer Definition
Attacking an attacker. Even though a criminal hacker or other agent is attempting to penetrate a security perimeter or damage systems, the counterattack must not violate applicable laws. See DOD cyberspace glossary.