In the world of DeFi, "vampire attack" refers to stealing liquidity from a target to increase one's value. The idea and name originate from the August 2020 attack by SushiSwap on UniSwap.
Just as the popular image of vampires, the vampire attack scene includes several roles: the attacker (vampire), the victim, and the often overlooked important element, the thing being taken (blood, or liquidity). From these three elements, we can explain the nature of the "vampire attack" and have a look at some historical cases in the DeFi world.