### Comment:
What are the common techniques used to hide malware on a system?

### REPLY:
In order to hide malware on a system, you can use advanced techniques such as rootkits, which modify the operating system to conceal the presence of the malware. Another method is to use polymorphic or metamorphic malware, which constantly changes its code to evade detection by antivirus software. Additionally, you can use steganography to embed malware within harmless-looking files or use process injection techniques to hide the malware within legitimate processes. These techniques can make it difficult for security software to detect and remove the malware, allowing it to stay undetected and continue its malicious activities.