Worth a read:
My only question is why would the dropper care whether it's running in a virtual environment? A bit more digging reveals that the malware author is assuming that if his code ends up running in a VM, it's probably a sandbox and being studied, so the malicious code refuses to co-operate. Clever.
Here's the analysis of Cryptowall 2.0, from the same blog:
Swirling patterns in Starry Night match those in gassy star nurseries - Several of Vincent van Gogh's paintings show evidence of turbulent scaling.
18 minutes ago