alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Matanbuchus Loader Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"RequestModuleVersionInformationORupdate=ey"; startswith; fast_pattern; http.header_names; content:!"Referer"; http.user_agent; content:!"Mozilla"; reference:md5,ef3dbbbd570955fa9f5562409e9566a0; reference:url,www.cyberark.com/resources/threat-research-blog/inside-matanbuchus-a-quirky-loader; classtype:trojan-activity; sid:2038617; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_08_25, deployment Perimeter, malware_family Win32_Matanbuchus, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_25;)