How can malware be hidden from antivirus software?
Malware authors use various techniques to evade detection by antivirus software. This includes using polymorphic or metamorphic code to change the signature of the malware, encrypting the malicious payload, obfuscating the code, and using rootkit techniques to hide the presence of the malware from the operating system.
One effective way to hide malware from antivirus software is by using a process injection technique called DLL injection. By injecting the malicious code into a legitimate process, the malware can avoid detection by antivirus software as it appears to be part of a trusted application. Another method is to use a rootkit to modify the operating system's kernel, allowing the malware to hide its presence and evade detection by antivirus software.