Which type of virus encrypts its content to evade detection from antivirus software?

The type of virus that encrypts its content to evade detection from antivirus software is indeed an encrypted virus. An encrypted virus uses encryption techniques to mask its payload, making it more challenging for signature-based antivirus systems to detect the malicious code. By encrypting its content, the virus can change each time it replicates, hence avoiding detection by recognizing patterns or signatures that antivirus programs typically rely on to identify malware.

Encrypted viruses often contain a decryption routine that runs when the virus activates, allowing the payload to execute and cause harm. This characteristic makes them particularly effective at evading detection, as traditional antivirus tools might not recognize the encrypted form of the virus.

Other types of viruses, such as stealth viruses or macro viruses, may utilize different techniques to evade detection or execute malicious tasks but do not specifically focus on encryption as the primary means of concealment. Understanding the various methods malware employs can aid in developing better protection strategies and recognition of potential threats.