This is not quite as significant a risk as the WannaCry outbreak, but still worth attention. Please review your SAMBA deployments and adjust accordingly.
Here is some additional motivation to stop the reuse of credentials across multiple services and websites.
I agree with the message of this article and specifically endorse the truth that real, effective cyber security begins with your employees. That said, the fact cannot be overlooked that good technology is being purchased, but is not being properly or consistently used. Add to this the fact that technologies are being purchased as point solutions for compliance requirements, but not leveraged across all the other valuable data sets within the organization.
This is an interesting essay by Bruce Schneier discussing the future of ransomware in the context of the Internet of Things. Enjoy!