### Comment:
What are some 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 packers or crypters to encrypt the malware code, making it more difficult for antivirus scanners to detect. Another approach is to use polymorphic or metamorphic techniques, which dynamically change the structure and behavior of the malware to create unique variants that can bypass signature-based detection. Additionally, attackers can also use rootkit techniques to hide the presence of malware on the infected system, making it harder for antivirus software to detect and remove.