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

### REPLY:
Some techniques used to evade detection by antivirus software include using packers and crypters to encrypt the malware's code, making it difficult for antivirus programs to identify the malicious patterns. Another method is code obfuscation, where the malware's code is intentionally made complex and convoluted to confuse antivirus scanners. Polymorphic malware is also effective, as it can change its code structure with each infection, making it harder for antivirus programs to detect. Additionally, attackers can use rootkit techniques to hide the presence of the malware on the infected system, making it challenging for antivirus software to detect and remove it.