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

### REPLY:
There are several techniques that can be used to evade antivirus detection. One common method is to use packers or crypters to encrypt the malware code, making it difficult for antivirus software to analyze and detect. Another technique is to use polymorphic or metamorphic code, which continuously changes its appearance to avoid signature-based detection. Additionally, malware authors can use rootkit techniques to hide their malicious code and processes from antivirus software.