Trend Micro Inc.

Haoping Liu

Josiah Dede Hagen

Jonathan Edward Andersson

Richard Andrew Lawshae

Muqeet Ali

Todd Joseph Kalauhala Manning

Proper functioning of an antivirus software running on an endpoint system is detected using a test data that is provided to the endpoint system. The test data is also provided to a backend system, which provides the endpoint system with an antivirus definition that includes information for detecting the test data. The antivirus software running on the endpoint system scans for the test data and reports detection of the test data to the backend system. The antivirus software is deemed to have failed the proper functioning test when the antivirus software fails to report detection of the test data. Proper functioning of the antivirus software is also detected by performing a challenge procedure, which involves sending a challenge message to the endpoint system. The endpoint system is expected to respond to the challenge message with a response that includes expected information.

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Haoping Liu