alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ELF/Win32 Lucky Ransomware CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?sys="; content:"&c_type="; distance:0; content:"&dis_type="; distance:0; fast_pattern; content:"&num="; distance:0; content:"&user="; distance:0; content:"&ver="; distance:0; reference:url,blog.nsfocusglobal.com/categories/trend-analysis/satan-variant-analysis-handling-guide/; classtype:command-and-control; sid:2026725; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Client_Endpoint, created_at 2018_12_13, deployment Perimeter, deployment Internal, malware_family Satan, confidence High, signature_severity Major, tag Ransomware, tag Multi_Platform, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_27, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)