### Comment:
What are some common techniques used to hide malware in legitimate files?

### REPLY:
One common technique to hide malware in legitimate files is through file extension spoofing. By changing the file extension to something that appears harmless, the malware can evade detection. Another technique is using file binders, which allow the malware to be attached to legitimate files, making it harder to identify. Additionally, rootkit technology can be employed to hide the presence of malware by manipulating the operating system.