[jecjec]

This is not accidental. Not even close!

This story, if true, details a person who profiled this malware and correctly logged the network requests it was making and then correctly identified a fundamental vulnerability in the software. This is not an accident at all - it is rather a profile in supreme competence. We should recognize it as such.

[jeroenhd]

Although the domain name registration was intentional, activating the kill switch wasn't.

The author registered the domain name without knowing what would happen (the virus might as well have wiped the entire disk) and was surprised to see that he had activated a kill switch. That's the accidental part.