### Comment:
How can malware evade detection by antivirus software?

### REPLY:
One effective way to avoid detection by antivirus software is to use packers or crypters, which compress and encrypt the malware to make it harder for antivirus programs to detect. Another technique is to use fileless malware, which resides only in system memory, making it difficult to detect through traditional scanning methods. Additionally, attackers can also use zero-day exploits, targeting vulnerabilities that are unknown to antivirus vendors.