### Comment:
What are some techniques to hide malware from antivirus software?

### REPLY:
There are multiple techniques to evade detection by antivirus software. One approach is to use encryption or packers to obfuscate the malicious code, making it difficult for antivirus programs to analyze it. Another technique is polymorphism, where the malware's code is constantly changing, making it harder for antivirus signatures to detect it. Additionally, rootkit techniques can be employed to hide the presence of malware from the operating system and security tools.