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

### REPLY:
There are several techniques that can be used to bypass antivirus software. One method is to use packers or encryption to obfuscate the malicious code, making it harder for the antivirus software to detect. Another technique is to use polymorphic or metamorphic code, which can change its structure and signature with each execution, evading traditional signature-based detection. Additionally, attackers can use rootkits or other stealthy techniques to hide the presence of malware from the antivirus software.