alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY External IP Address Lookup - b4secure .com"; flow:established,to_server; urilen:12; http.uri; content:"/index.shtml"; http.host; content:"b4secure.com"; fast_pattern; endswith; reference:url,researchcenter.paloaltonetworks.com/2016/10/unit42-psa-conference-invite-used-lure-operation-lotus-blossom-actors/; classtype:external-ip-check; sid:2023469; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_10_31, malware_family Emissary, malware_family Lotus_Blossom, confidence High, signature_severity Informational, updated_at 2020_08_03;)