alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Multiple EKs CVE-2013-3918"; flow:established,from_server; file_data; content:"C|3a 5c|rock.png"; nocase; fast_pattern; content:"19916E01-B44E-4E31-94A4-4696DF46157B"; nocase; classtype:exploit-kit; sid:2018592; rev:3; metadata:created_at 2014_06_20, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)