Which open-sourced phishing toolkit can Steve use for phishing simulations?

The correct answer is Gophish, which is an open-source phishing toolkit designed for conducting phishing simulations and training. Gophish enables users to create realistic phishing email campaigns, manage accounts, track the effectiveness of campaigns, and gather valuable data on user interactions. This tool is particularly beneficial for organizations aiming to educate their employees about phishing threats and improve their overall security awareness.

In contrast, SPAMfighter is primarily an anti-spam tool, focusing on filtering unwanted emails rather than simulating phishing attacks. Gpg4win is a software package used for email encryption and secure document handling, which is not relevant to phishing simulations. Ekran System is a privileged access management solution that monitors user activity but does not specialize in phishing simulation. Thus, Gophish stands out as the most suitable choice for conducting phishing simulations.