alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SAD Ransomware CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?hwid="; fast_pattern; content:"&osname="; content:"&pcname="; content:"&key="; http.header_names; content:!"Referer|0d 0a|"; reference:md5,f4c2f65b5b89d4f4e74099571b40c0d5; classtype:command-and-control; sid:2024954; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_11_03, deployment Perimeter, malware_family SAD_Ransomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_13, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)