### Comment:
What are some common techniques to bypass antivirus software?

### REPLY:
There are several techniques that can be used to bypass antivirus software. One method is to use packers or crypters to encrypt the malware code, making it difficult for antivirus programs to detect. Another technique is to use polymorphic or metamorphic malware, which can change its structure and code to evade detection. Additionally, attackers can use rootkit technology to hide the presence of malware from antivirus programs, or exploit zero-day vulnerabilities that are not yet known to the antivirus software.