ET MALWARE MSIL/Runsome Ransomware CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/Runsome Ransomware CnC Checkin";
    flow:established,to_server;
    http.uri;
    content:".php?name=";
    content:"&key=ENC"; distance:0; fast_pattern;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|"; depth:8;
    content:!"User-Agent|0d 0a|";
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,70c27926e54732a579b0004ede566fc6;
    reference:url,github.com/ShaneNolan/Runsome;
    classtype:command-and-control;
    sid:2024223; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_04_19, deployment Perimeter, malware_family Ransomware, malware_family Runsome, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_05, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)