now i tested the fpolicy and it works fine:
nodeb> fpolicy create f_Ransomware screen File policy f_Ransomware created successfully. nodeb> fpolicy ext inc set f_Ransomware locky,xxx,zzz nodeb> fpolicy monitor set f_Ransomware -p cifs,nfs create,rename nodeb> fpolicy options f_Ransomware required on nodeb> fpolicy enable f_Ransomware Warning: User requests may be denied because there are no file screening servers registered with the filer. Are you sure? y File policy f_Ransomware (file screening) is enabled.
now you can´t rename or create any files with extension lockyxxx,zzz
regards
stefan