What software displays itself as a useful or helpful program and turns out to be malicious instead of or in addition to the previous assumption?

Question

Quizplus · Accepted Answer

A Trojan is software that represents itself as something desirable and when installed it drops a malicious payload.
Key Takeaway: A Trojan Horse, or Trojan for short, is malware that disguises itself by making the user think it is a desirable or beneficial program, and then once the user installs or runs it, it drops its malicious payload on the system. It is named for the wooden horse filled with soldiers that the ancient Greeks used at Troy to get inside the city.

What Software Displays Itself as a Useful or Helpful Program