As his friends told us iGuRu.grThe σελίδα of the National Center for Research & Technological Development shows us that the site has been hacked.
The subdomain that appears to have been attacked is http://nanoredsol.apt.cperi.certh.gr and belongs to https://www.certh.gr/.
The hack was done by Turkish hackers and the team Nizam-I Cedid consisting of members GhostHacker, KALKAN and Mr.Zone.
The page that was attacked
http://nanoredsol.apt.cperi.certh.gr/cedid.gif
We do not know more details at the moment, the hack has not been published on PoC websites yet, however the team «achievements» of her, in the account she maintains at Instagram.
https://www.instagram.com/p/CCRu7-VooXj/?fbclid=IwAR0d-1yGksMbozsJvx2LUksRZ3QTovgY3KlC3SQYFLKwlC09qhtvu-6vYmE