Trojan horse

Từ điển Oxford Advanced Learner 8th

ˌTrojan ˈhorse [Trojan horse] BrE NAmE noun
1. a person or thing that is used to trick an enemy in order to achieve a secret purpose
2. (computing)a computer program that seems to be helpful but that is, in fact, designed to destroy data, etc. From the story in which the ancient Greeks hid inside a hollow wooden statue of a horse in order to enter the city of their enemies, Troy.