alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (Fire-Cloud)"; flow:established,to_server; http.user_agent; content:"Fire-Cloud"; bsize:10; reference:md5,804c8f7d3b10b421ab5c09d675644212; classtype:trojan-activity; sid:2031065; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_10_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_20;)