alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Snojan Variant Sending System Information (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.header_names; content:"|0d 0a|Content-Type|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|"; http.request_body; content:"NetBios|20|name|3a 20|"; content:"|0d 0a|Username|3a 20|"; distance:0; content:"|0d 0a|Operating|20|system|3a 20|"; distance:0; fast_pattern; reference:md5,21b75d95a833c8e366747afcb4b25051; classtype:trojan-activity; sid:2044259; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_21, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Snojan, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_21; target:src_ip;)