That's an unrelated probe for a different, surely vulnerable, script - Zeroboard. If the attack probes disturb you, begin gathering their patterns and plonking

That's an unrelated probe for a different, surely vulnerable, script - Zeroboard. If the attack probes disturb you, begin gathering their patterns and plonking their IPs into a black hole using something like fail2ban. Er, well, that's what I'd do on a normal system. Not sure what to do about that on GAE.