alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/CONFUCIUS_B External IP Check to CnC M2"; flow:established,to_server; urilen:6; http.method; content:"POST"; http.uri; content:"/2.php"; fast_pattern; http.content_len; content:"0"; bsize:1; http.header_names; content:!"Referer"; content:!"Accept-"; reference:url,www.researchcenter.paloaltonetworks.com/2016/09/unit42-confucius-says-malware-families-get-further-by-abusing-legitimate-websites/; reference:md5,2d2fe787b2728332341166938a25fa26; classtype:trojan-activity; sid:2029925; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_16, deployment Perimeter, deprecation_reason Age, malware_family CONFUCIUS_B, confidence High, signature_severity Major, updated_at 2023_12_28, reviewed_at 2023_12_28;)