I have read Kaspersky's analysis and I still don't understand what makes this specific malware so much worse then the others. So it used a combination of rootkit,bootkit and platform specific viruses to spread.
Nice, it seems like it was mostly based on known vulnerabilities. Meaning that if the IT personal had kept the software up to date, it wouldn't have spread as far.
As far I manage to understand, they didn't exploit zero-day vulnerabilities. They tries to use a vulnerability in Kaspersky's software that was patched in '08.
I'm not saying I can write code to this level (I can't), but why is this virus so much worse then the others that have been revealed?