FireEye has discovered a campaign leveraging the recently announced zero-day CVE-2013-3893. This campaign, which we have labeled Operation DeputyDog, began as early as August 19, 2013 and appears to have targeted organizations in Japan. FireEye Labs has been continuously monitoring the activities of the threat actor responsible for this campaign. Analysis based on our Dynamic Threat Intelligence cluster shows that this current campaign leveraged command and control infrastructure that is related to the infrastructure used in the attack on Bit9.;