Okay, you need to listen carefully, because some of this is going to be confusing.
You do not have a virus (i.e. self-replicating malware), but you do have a Trojan Horse (software that you downloaded from a Web site or possibly from a questionable download of what appeared to be legitimate software; your bundle deal is a likely suspect.)
It CAN ONLY HARM your Mac if you give it permission to run/load. DO NOT give it the permission that it is asking for UNDER ANY CIRCUMSTANCES.
I've never heard of an "osascript virus" before, and interestingly neither have ANY of the reputable anti-virus tracking Web sites. "OSA" is Open Scripting Architecture, and is a legitimate process. I don't know what the "osascript virus" will do if you allow it to run. Possibly nothing at all terribly nasty, I'm guessing. The reason that I'm guessing that is because there are new Web sites (that you've found some of) suddenly on the Web telling you how to deal with the "osascript virus" from previously unknown entities. My guess is that the software that they are encouraging you to purchase to clean out the osacript virus is this bit of malware's real payload. That is, this malware only exists to get you to go to the Web and purchase and install software that is actually malware! (This is a threat pattern that has become common very recently.) DO NOT PURCHASE any software such a site exhorts you to, to deal with the osascript virus.
What needs to happen is some reputable source has to examine this malware and come up with guidance on how to remove it manually, or a reputable anti-virus software company has to come out with an update to their product and push out an updated definition so that their product can clean out this malware for you.
So my advice is to sit tight for a couple of days until we can get that guidance to you or until a product can be updated to help you.
My guess is that this free product will be updated to help you sooner than anything else. (Intego, the company that makes it, is very aggressive in identifying new threats and pushing out updates to deal with them.) You can download it now and run it now and then until the point that it has been automatically updated to deal with the osascript virus:
VirusBarrier Free Edition (free)
Free antivirus and malware security for your Mac! Intego Virus-Barrier Scanner can scan and remove Mac and Windows malware with a single click. VirusBarrier Scanner will detect any infected files which you might have downloaded or gotten in your inbox. This way your Mac is always kept safe and...
itunes.apple.com
Hang in there. I'll post again when I know more.