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

### REPLY:
One common technique to evade detection by antivirus software is to use encrypted communication channels to communicate with command and control servers. This makes it difficult for security software to monitor and analyze the traffic. Another approach is to use fileless malware, which resides in the system's memory and does not leave traces on the hard drive, making it harder to detect. Additionally, attackers can also use sandbox evasion techniques, such as checking for the presence of virtual environments, to avoid being analyzed by security researchers.