### Comment:
What are some common evasion techniques used by malware to avoid detection?

### REPLY:
To evade detection, malware can use advanced techniques such as polymorphic code, which modifies its own code structure with each infection to avoid signature-based detection. Another effective technique is rootkit installation, which allows the malware to hide itself and its malicious activities from the operating system and security software. Additionally, encryption and obfuscation methods can be used to make the malware's code difficult to analyze and detect by security tools.