alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Unk.HRESQ! MultiDownloader Checkin M2"; flow:established,to_server; http.request_line; content:"POST|20|/service/communication.php|20|HTTP/1.1"; startswith; fast_pattern; http.request_body; content:"data="; startswith; isdataat:50,relative; http.header_names; content:!"Referer"; reference:md5,9a112488064fd03d4a259e0f1db9d323; classtype:trojan-activity; sid:2034202; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_07, deployment Perimeter, malware_family Win32_Unk_HRESQ_, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_07;)