alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (xfilesreborn)"; flow:to_server,established; http.user_agent; content:"xfilesreborn"; startswith; fast_pattern; reference:md5,ba542a8d1d21e2016ade340fdc08d1a4; classtype:trojan-activity; sid:2038731; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_02, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_02, reviewed_at 2024_05_08;)