### Comment:
Can you explain how malware can evade detection by antivirus software?

### REPLY:
Malware can evade detection by antivirus software through advanced techniques such as using customized encryption algorithms to encrypt the malware code, making it difficult for antivirus scanners to detect. Another method is to use rootkit techniques to hide the presence of the malware on the system, enabling it to operate stealthily. Additionally, malware authors can use code obfuscation techniques to make the malware code appear benign or as legitimate software, tricking antivirus software into classifying it as safe.