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

### REPLY:
Some common techniques to evade detection by antivirus software include using packers or crypters to modify the malware's code and make it harder for the antivirus software to detect. Another technique is polymorphism, where the malware constantly changes its code or behavior to avoid detection. Additionally, attackers may use rootkit techniques to hide the presence of the malware on the infected system, making it even more difficult for antivirus software to detect.