Hello,
Web Attack: Facebook Fake Survey 3 exploits Microsoft Internet Explorer CVE-2012-1876 Col Element Remote Code Execution Vulnerability
http://www.securityfocus.com/bid/53848/info
I would recommend you to -
1) Make sure ALL Computers are installed with Symantec EP with latest / updated with virus defintions.
2) Install ALL Latest Microsoft Secuirty Patches / Sevice Packs on ALL machines.
3) Make sure ALL the client machines are using the Latest Vendor Patches installed.
If the IPS signture indicates that the malicious traffic was safely blocked and your computers are fully patched, then you should be OK. Definitely do keep your defences up and stay aware. Social networking is great, but as with most things there are scams and dangers. Her is some good reading from Symantec and Facebook security teams:
Social Scams
https://www-secure.symantec.com/connect/blogs/social-scams
Phishers' Fake Security App for Facebook
https://www-secure.symantec.com/connect/blogs/phishers-fake-security-app-facebook
Here's a direct link to that whitepaper:
http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/scams_and_spam_to_av
Hope that helps!!