Regarding spam bots in the forums

For what seems to be a week or two, the forums have been victims of spam bots. With them still coming here after a while with just forum mods deleting the threads after a few hours, couldn't there be an automated cleaning solution?

Things to consider:
All the bots seem to come spamming about fake university degrees.
They always use strings consisting of chinese characters.
They always use the words meaning "diploma" and/or "certificate". Some include "fake".


Could an automated script be installed to monitor the forums and automatically ban the accounts or at the very least ask for moderator approval before posting? With these strings being monitored, I doubt a chinese user would come here talking about his diploma or certificate. I don't think it will cause an inconvenience with the chinese community.