Hi, I'm new to this forum.
I am on a MACBook PRO running Mtn Lion 10.8.5 and Sophos 8.0.20C
Yesterday I was on what is known to be a reputable website to sign up for classes at the upcoming Tucson gem & Mineral show (jewelrytools.com). I selected classes and followed through to pay for them by entering my credit card information. My transaction was denied at first but I noticed I had entered the wrong expiration year. I corrected it and tried again. Still denied. I quick call to my credit union revealed that they red flagged it and stopped my card. They saw no other transactions or attempts at this point. I assured them it was me and they freed my card up for use. A few minutes later I tried again to complete the transaction but it was denied again. Then I noticed my computer was froze. Beach ball spinning away. Sophos showed it was downloading updates. It continued for several minutes, in the mean time I couldn't open up any other page or move anywhere. I did a hard shut down. Went back to the site again to try and complete the transaction and was denied again. I called my credit union to discover that in that small time frame of approximately 20-30 minutes after my card had been freed up again, there were numerous transactions attempted at numerous businesses/websites for amounts from $1.52 to thousands of dollars. Some were approved before the card got shut down for the second time. The interesting part of this is that many of the attempts tried to use the incorrect expiration date, the one I had entered in the first place to complete my transaction at jewelrytools.com.
I ran a full scan on Sophos, it revealed nothing out of order. I've been leery of updating to Mavericks. I also learned today in this forum that Version 9 is out for Sophos so I will update today. My question is how did this happen? Where is the hole? Is there some protection on my system that is lacking? How do I protect myself from this happening again? I appreciate any help here.
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