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

### REPLY:
To effectively evade detection, malware can employ advanced techniques such as encrypting its code, using packers or crypters to obfuscate its behavior, and using rootkits to hide its presence on the infected system. It can also use anti-VM techniques to detect if it is running within a virtual machine environment and avoid analysis. Additionally, malware can employ sandbox detection techniques to identify if it is being executed within a controlled environment and alter its behavior accordingly.