New tool Spots file-encrypting malware known as ransomware. Windows-only software, called CryptoDrop, watches for common tactics wielded by ransomware families. Ransomware acts very differently from legitimate software in that it very quickly makes drastic changes to many files. To date, the software has been tested against 49 samples downloaded from some 14 families: CryptoFortress, Cryptolock, PoshCoder, CTBocker, CryptoLocker, Virlcode Virlistorist and a clone.”]
Source: https://www.govinfosecurity.com/researchers-unleash-ransomware-annihilation-a-9255