The FBI and the Department of Homeland Security are warning of a heightened danger of insider threats to cyber security, stemming from disgruntled and/or former employees.
According to Infosecurity, the FBI and Department of Homeland Security have deemed that “disgruntled and former employees pose a significant cyber-threat to US businesses due to their authorized access to sensitive information and the networks businesses rely on”.
US-CERT also provided a list of handy tips to protect against insider threats, including no-brainer advice like terminating all accounts associated with an employee or contractor immediately upon dismissal. Companies should also of course change administrative passwords to servers and networks following the release of IT personnel.