Detecting Inside threats can be difficult because legitimate credentials are being used to access company assets, causing unintentional or malicious harm to the company.  Many breaches result from compromised user accounts, where employees are tricked into installing malware on their computer.  Once inside the system, adversaries they can change permissions and even create new users, and in worst case scenarios, they can access protected data, meaning your confidential information is no longer under your control.

Source: LogPoint