alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Suspicious UA (cctv.mtv)"; flow:established,to_server; http.user_agent; bsize:8; content:"cctv.mtv"; reference:md5,deffb804976c0531144d999ded0df8b9; classtype:bad-unknown; sid:2030598; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_07_27, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_27;)