alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/DCRat CnC Exfil"; flow:established,to_server; urilen:>150; http.method; content:"POST"; http.uri; content:".php?"; http.request_body; content:"|0d 0a|Content-Type|3a 20|"; pcre:"/^[a-f0-9]{32}\r\n\r\nPK/Rsi"; content:"Browsers/"; fast_pattern; distance:0; http.header_names; content:!"Accept-"; content:!"Referer"; reference:md5,3aa17643535d17db367447e1104e12d9; classtype:trojan-activity; sid:2033087; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_04, deployment Perimeter, malware_family DCRat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_09;)