alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Suspicious UA (CODE)"; flow:established,to_server; http.user_agent; bsize:4; content:"CODE"; fast_pattern; reference:md5,f5ee4c578976587586202c15e98997ed; classtype:bad-unknown; sid:2030439; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_01, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_10;)