किस प्रकार का दुर्भावनापूर्ण सॉफ़्टवेयर (मैलवेयर) वैध या उपयोगी प्रतीत होता है, लेकिन निष्पादित होने पर हानिकारक या अवैध गतिविधि करता है?

Which of the following actions is NOT performed by malware?

Deceptive programs that appear to perform one useful function, but secretly perform malicious activities, are known as:

Which of the following can be categorized as malicious software (malware)? I. Spyware II. Keyloggers III. Ransomware IV. Trojan horses