1. A computer system, comprising: a non-transitory memory storing instructions; and one or more hardware processors coupled to the non-transitory memory and configured to read instructions from the non-transitory memory to cause the system to perform operations comprising: issuing a challenge to an application interacting with a computer system to determine whether activity performed by the application is scripted, wherein the challenge is issued for processing by the application without human user involvement; receiving a response comprising an answer to the issued challenge from the application, the answer being determined by the application without human user involvement in response to the issued challenge; analyzing the answer to the issued challenge determined by the application without human user involvement in view of an expected answer to determine whether the answer is correct; and classifying the application as scripted in view of determining that the answer determined by the application without human user involvement is at least partially incorrect.