alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BlackEnergy POST Request"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; http.request_body; content:"id="; depth:3; content:"&bid="; distance:0; fast_pattern; content:"&t="; distance:0; reference:url,f-secure.com/documents/996508/1030745/blackenergy_whitepaper.pdf; reference:md5,72372ffac0ee73dc8b6d237878e119c1; classtype:trojan-activity; sid:2019283; rev:3; metadata:created_at 2014_09_26, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_12;)