[Exim] Exim filter help please!

our site host runs EXIM, but I can only input filters through Cpanel

Our server runs Spam Assassin

I want to test the hit score of spam assassin and dump anything that scores
over 8.

here is the spam assassin header:
X-Spam-Status: Yes, hits=10.5 required=7.2 tests=FORGED_RCVD_NET_HEL (and a
lot of stuff behind this....)

So, I can tell Cpanel to:

Filter Any Header
that MATCHES
REGEX

Discard

What would the proper regex be?

Help?

John