What I think is very weird about this whole mess is... How come no kind of custom firewall was programmed? This would be impossible if some simple filters would be put in place aswell as an automatic analysis tool in combination. This all happened in a day or so

And no red flags at all? Okey... That's quite shocking.
Mr Kodrič should be worried for his own safety if this won't be repaid (speculating, not making threats).