FireEye Labs published the analysis of this zero-day vulnerability. In the first part it provides a detailed analysis on the Advanced Persistent Threat (APT), while in part 2 it provides a deep dive on the exploitation part of the campaign.
Read more here – http://www.fireeye.com/blog/technical/cyber-exploits/2013/09/operation-deputydog-part-2-zero-day-exploit-analysis-cve-2013-3893.html