Select the correct definition$($s$)$ of examples of security risks and attacks.

Multiple select question.

Botnet is a self$--$replicating program that runs and spreads by modifying other programs or files.

Spyware is secretly installed into an information system to gather information on individuals or organizations without their knowledge.

Spoofing is sending a network message that appears to come from a source other than its actual source.

Trojan horse is a collection of software robots that overruns computers to act automatically in response to the bot$-$herder$$s control inputs.