Yesterday, 8/4/14, a number of websites,
including a Synology's Facebook post, started reporting that some users Diskstations had been infected with ransomware calling itself "Synolocker". The Cryptolocker variant encrypts files on the Diskstation and holds them for a 0.6 Bitcoin (~$400) ransom.
Details have been scarce regarding the exact devices or firmwares infected. Synology is investigating how the ransomware infiltrated the devices now.
Users have been encouraged to disable port forwarding on their routers and disable the Quickconnect function. Extra steps could include disconnecting the Diskstation from the router entirely or shutting down the unit until a fix is released.
As an owner of a DS213+ for personal data storage, I'm a little disturbed at the lack of official response from Synology. I've disabled port forwarding and the quick connect function so I am unable to access my device remotely. I could understand people using Diskstations for business use would be rather frustrated with this situation. I hope Synology can provide more information and a resolution quickly.