### Comment:
How can malware evade detection by antivirus software?

### REPLY:
Malware can evade detection by antivirus software through various means. One technique is to use polymorphic code, which constantly changes its structure to avoid detection based on signatures. Another method is to use rootkit techniques to hide the presence of malware from the operating system and antivirus software. Additionally, attackers can use packers or obfuscation techniques to make the malware code difficult to analyze and detect.