### Comment:
What are some common techniques used by malware to evade detection by antivirus software?

### REPLY:
One way to evade antivirus software is to use a rootkit, which can hide the presence of the malware by modifying the operating system. Another technique is to use a process injection method, where the malware injects its code into a legitimate process, making it harder to detect. Additionally, using a packer or a crypter can help obfuscate the malware code, making it difficult for antivirus software to analyze and detect it.