So the other day my mom forwarded me a chain email with an Excel attachment, saying it's a game. I opened it without giving it much thought and found out it was a flash game embedded inside. Because I can't think of a good reason for anyone to put flash in Excel, I got suspicious of it and discovered that this is a known method of trojan attack.
Now, this exploit was discovered patched years ago and I'm pretty sure my Excel 2010 with the latest updates handled it safely. The question is, how do I find out if there was malicious code in that file to begin with? What tools can I use to prove my suspicions?