Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/InfoStealer Variant Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri.raw; content:"|2f 2f|data.php"; bsize:10; fast_pattern; http.request_body; content:"|5b|"; startswith; http.header_names; content:"|0d 0a|Content-Type|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a 0d 0a|"; bsize:48; reference:md5,0c6320d07c1d933dfecf6d6104ed7f99; classtype:trojan-activity; sid:2039512; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_10_24, deployment Perimeter, deployment SSLDecrypt, malware_family MSIL_InfoStealer, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_24;)