What is the latest version of CryptoWall?

As a cryptocurrency and finance practitioner, I'm keen to stay updated on the latest developments in the security landscape. Could you provide me with a concise yet detailed overview of the most recent version of CryptoWall? This notorious ransomware has evolved over the years, so it's crucial for us in the industry to be aware of its new features and how it poses threats to users. Understanding its capabilities and potential impact is essential for devising effective countermeasures and protecting our clients' assets.