Delorean

Delorean is an NTP server written in Python that lets you feed a target device a time of your choosing. Controlling a device's clock is a surprisingly powerful primitive — plenty of security checks depend on the current time.

Good for:

• NTP spoofing to move a device's clock forward or backward.
• Bypassing time-based checks such as certificate expiry and validity windows.
• Testing how an IoT device behaves when its notion of time is manipulated.

Notes: Open source (GitHub), by Jose Selvi. Combine it with a controlled network (e.g. mitmrouter) so the target device pulls its time from your server.