alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Karagany encrypted binary (3)"; flow:established,to_client; file_data; content:"|f2 fd 90 00 bc a7 00 00|"; within:8; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2016970; rev:4; metadata:created_at 2013_06_05, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)