ET MALWARE SAD Ransomware CnC Activity

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;
)