The history of Cryptowall: a large scale cryptographic ransomware threat This tracker focusses on tracking the development changes in the CryptoWall ransomware, it does not attempt to track every single CryptoWall sample that exists. It simply exists to track the family in a more higher level fashion, a few samples will be listed next to specific versions just for reference rather than bulk collection. The timeline below shows the development track of CryptoWall when new versions were first seen. Below the timeline you will find an overview.