alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP PUA Boxore User-Agent"; flow:established,to_server; http.user_agent; content:"BoxoreClent"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,5cb2e8a9b6935f228623c69f1b17669d; classtype:pup-activity; sid:2021700; rev:8; metadata:created_at 2015_08_21, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_02;)