alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DPRK APT Related Maldoc Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"c__"; content:"ENTERWindows"; distance:0; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:url,twitter.com/h2jazi/status/1516443236264521740; reference:md5,9f2235f0d07bd903c947b17caa82ded4; classtype:trojan-activity; sid:2036277; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_04_20, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_20;)