### 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 method is to use code obfuscation techniques to make the malware code harder to analyze. This can include encrypting the code, using packers, or using polymorphic techniques to generate unique variants of the malware. Another technique is to use rootkit functionality to hide the presence of the malware from antivirus software. Additionally, malware authors can use sandbox evasion techniques to detect if their code is being executed in a controlled environment and modify their behavior accordingly.