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

### REPLY:
One common technique used by malware to evade detection by antivirus software is to exploit vulnerabilities in the antivirus software itself. By exploiting these vulnerabilities, the malware can disable or bypass the antivirus software, allowing it to operate undetected on the infected system. Another method is to use rootkit functionality to hide its presence from the operating system and antivirus software, making it extremely difficult to detect and remove the malware.