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

### REPLY:
There are several techniques that can be used to hide malware on a system. One common method is to use rootkit technology, which allows the malware to gain elevated privileges and hide its presence from security software. Another technique is to use steganography, where the malware is embedded within innocent-looking files such as images or documents. Additionally, polymorphic malware can change its code structure to evade detection by antivirus programs.