alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (dBrowser CallGetResponse)"; flow:to_server,established; threshold:type limit, count 2, track by_src, seconds 300; http.user_agent; content:"dBrowser"; startswith; content:"CallGetResponse:"; fast_pattern; distance:3; within:16; pcre:"/^dBrowser\x20\d\x20CallGetResponse\x3a\d$/V"; reference:md5,e09ad59bff10bd4b730ee643809ec9a7; classtype:trojan-activity; sid:2034948; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_01_19, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_19, reviewed_at 2024_05_07;)