This is beginning to sound more serious.
I actually had not had any experience with the Synology products, but some of the machines I work with do have some NAS devices attached so this I thought might bear some looking into.
Think I’ll start doing some checking when I go out and about today to perform some security checks.
SynoLocker Ransomware Affecting Synology DiskStation
From the post:
Based on our current observations, this issue only affects Synology NAS servers running some older versions of DSM (DSM 4.3-3810 or earlier), by exploiting a security vulnerability that was fixed and patched in December, 2013. At present, we have not observed this vulnerability in DSM 5.0.