Ok , so I'll update and explain further.
We have IT , the steps are ongoing.We've reported to the authorities.Beer flows.
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This is about pounding an 'effing coffin nail into some dumb shit that needs it.
Here's what I know.(or think I know)
The mac is the source.It had Vuze , as well as the possibility of someone just clicking the wrong link.
From what I understand , it went from said mac (not on the domain) into computers
on the domain.
After that they appear to have access to everything , they encrypted the server hdd's.
It looks like a total compromise to me....rootkits etc....but I don't know , I'm trying to find out what paranoia level to escalate to.
So I've got that mac , and it was not cleaned from what I know....so I'm going to run it in a closed environment and see what pop's up....
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Back to the original question.....Imma run snort on the sandbox router , and solarwinds elsewhere.....any advice on other stufff ?? .....I'm going run all the anti-malware /virus usuals......hijackthis etc....