alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible APT30 or Win32/Nuclear HTTP Framework POST"; flow:established,to_server; content:"|0d 0a 0d 0a|"; byte_jump:4,1,relative,little,post_offset -6; isdataat:!2,relative; http.method; content:"POST"; http.header; content:"|20 28|compatible|3b 20|MSIE 6.0|3b 20|Win32|29 0d 0a|HOST|3a|"; fast_pattern; http.header_names; content:!"Accept"; content:!"Content-Type|0d 0a|"; content:!"Referer|0d 0a|"; reference:url,www2.fireeye.com/rs/fireye/images/rpt-apt30.pdf; classtype:targeted-activity; sid:2020898; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_04_13, deployment Perimeter, malware_family Nuclear, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2020_11_05;)