alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Matrix Ransomware Sending Encrypted Filelist"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|Synapse)"; depth:33; endswith; http.request_body; content:"name=|22|uploadfile|22 3b 20|filename=|22|C|3a 5c|"; content:"|0d 0a|[ALL]|0d 0a|"; distance:0; content:"|0d 0a|[ALL_END]|0d 0a 0d 0a|[PRIORITY]|0d 0a|"; fast_pattern; distance:0; http.header_names; content:!"Referer"; reference:md5,e5293a4da4b67be6ff2893f88c8ef757; classtype:trojan-activity; sid:2024178; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_04_04, deployment Perimeter, malware_family Ransomware, malware_family Matrix, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)