hashcat for SHA256 partial string?

[torlib]

Hi there, for a Christmas gift, I got a "hacking game" I'm halfway through it, but I'm a bit stuck now..

I have an IP address to SSH into. Separate to this I have the following instructions:

The instructions read as follows:
You can SSH into it [the server] with the username "defence".
The SSH key is encrypted with a password.
Use brute-force to crack it:

- the password consists of 7 digits
- the SHA256 of the password string starts with 49192A4F3F3


Is this something I can use hashcat for? If so, would anyone be kind enough to outline the steps?
Thanks in advance.