ET MALWARE Loki Locker Ransomware Server Response (Public Key) M1

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Loki Locker Ransomware Server Response (Public Key) M1";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"text|2f|html|3b 20|charset|3d|UTF|2d|8"; bsize:24;
    http.content_len;
    byte_test:0,<=,1000,0,string,dec;
    http.response_body;
    content:"|7b 22|public|22 3a 22|"; startswith; fast_pattern;
    content:"|22 2c 22|message|5f|id|22 3a 22|"; distance:0;
    content:!"|22 2c 22|"; distance:0;
    reference:url,blogs.blackberry.com/en/2022/03/lokilocker-ransomware;
    reference:md5,8aea251877cb4f5ee6cf357831f8620c;
    reference:url,twitter.com/James_inthe_box/status/1504194638885711872;
    classtype:trojan-activity;
    sid:2035512; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_17, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_22, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)