Thwart CryptoLocker warn if x number of files have changed

Hi,

I'm trying to create a backup strategy to reduce the impact of viruses such as CryptoLocker. I'm a long time user of SyncBackSE currently running v5 but have noticed that v6 added a feature to warn or abort a backup if deleting a number of files over a defined percentage. Does anyone know if this or another function could warn/abort if a number of files over a defined percentage have been changed, i.e. if something like CryptoLocker had encrypted all the said files?

Many Thanks