Antivirus exclusions are settings that tell security software to ignore specific files, folders, processes, or paths. They are meant to reduce false positives and prevent performance issues when trusted software is repeatedly flagged. In practice, an exclusion creates a blind spot: the excluded item may no longer be scanned, monitored, or blocked by the antivirus engine.
That matters because attackers often try to add exclusions for their malware, or they abuse legitimate exclusions already present on a system. If a malicious executable, script, or parent process is excluded, it can run with far less resistance and may evade detection during launch and persistence. Defenders should keep exclusions minimal, review them regularly, and alert on new or unusual changes. Good monitoring focuses on who changed the setting, what was excluded, and whether the exclusion matches a real operational need.