alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Ramsay CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?vol="; fast_pattern; content:"&q="; distance:0; content:"&guid=|7b|"; distance:0; content:"|7d|"; endswith; http.request_body; pcre:"/^[\x20-\x7e\r\n]{0,13}[^\x20-\x7e\r\n]/si"; reference:url,github.com/eset/malware-ioc/blob/master/ramsay/samples.sha256; classtype:command-and-control; sid:2030176; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_18, deployment Perimeter, malware_family Ramsay, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_18;)