I have had other AV software detect and have found the files from .worm-koobface , but Comodo AV never detected it. The virus came back about 4 to 5 times, till I found out how to remove it. Comodo would never see it, during scans.
I will have to send .worm-koobface, if it comes back again. I found the file and was able to remove it . It came from a site that uses Facebook cookies and ad’s . It is related to Facebook.