It's news a few days ago.
I was about to write a post to inform but I didn't have time.
However, we must not even be alarmed, but all the antivirus now recognize it.aca/medre.a is the name given to him by eset, but every software house antivirus has "baptized" in different name: alisp/blemfox.a (microsoft), trojan.acad.bursted.w (bitdefender), als.bursted.b (symantec), as you can also read in this of the knowledge of autodesk: http://usa.autodesk.com/adsk/servle...2&id=19860569&linkid=9240697&cmp=otc-rsssup01here is described instead the mode of infection: http://www.nod32.it/threat-center/encyclopedia1.php?id=2724