alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Matrix Max Stealer Exfiltration Observed"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/gate.php"; 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|"; bsize:60; http.request_body; content:"zipx=UEsDBBQ"; startswith; fast_pattern; reference:md5,e8573f06d342ae05ece8d1be111669c4; reference:url,twitter.com/James_inthe_box/status/1516049381539004418; classtype:trojan-activity; sid:2036245; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_04_18, deployment SSLDecrypt, former_category MALWARE, malware_family Matrix_Max, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_09_12, reviewed_at 2024_09_12;)