### Comment:
What are some common techniques to evade detection by antivirus software?

### REPLY:
There are several techniques to evade detection by antivirus software. One method is to use packers or crypters to encrypt the malicious code, making it difficult for antivirus programs to identify the malware signatures. Another approach is to use polymorphic or metamorphic techniques to constantly change the code structure of the malware, making it more challenging for antivirus software to detect. Additionally, hackers can use rootkit techniques to hide the presence of malware from the operating system and security software.