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

### REPLY:
There are several techniques that can be used to evade detection by antivirus software. One method is to use encryption or obfuscation techniques to hide the malicious code. This can make it more difficult for antivirus programs to detect the malware based on its signature. Another technique is to use polymorphic or metamorphic code, which changes its structure or behavior each time it is executed, making it harder to identify and analyze. Additionally, attackers may use packers or crypters to compress and encrypt the malware, making it more difficult for antivirus software to detect.