alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/TinyNuke CnC Checkin"; flow:established,to_server; flowbits:set,ET.TinyNuke; http.method; content:"POST"; http.uri; content:!"&"; content:".php?"; pcre:"/\.php\?[A-F0-9]{15,25}$/i"; http.header; header_lowercase; content:"|0d 0a|content-length|3a 20|9|0d 0a|"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,917124e4d53057324aa129520fca73fb; classtype:command-and-control; sid:2024991; rev:11; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_27, deployment Perimeter, malware_family Win32_TinyNuke, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_04_21;)