ET MALWARE Win/Ghostlocker Ransomware Activity M2 (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win/Ghostlocker Ransomware Activity M2 (POST)";
    flow:established,to_server;
    urilen:4;
    http.method;
    content:"POST";
    http.uri;
    content:"/add";
    http.user_agent;
    content:"python-requests/"; startswith;
    http.accept_enc;
    content:"|20|zstd";
    http.request_body;
    content:"|7b 22|id|22 3a 20 22|"; startswith;
    content:"|22 2c 20 22|key|22 3a 20 22 62 27|"; distance:0; fast_pattern;
    content:"|27 22 2c 20 22|pcname|22 3a 20 22|"; distance:0;
    http.header_names;
    content:!"Referer";
    reference:md5,dfb5e2963e9bc48c904f4ac5978fe9ea;
    reference:url,www.rapid7.com/blog/post/2023/11/08/ghostlocker-a-work-in-progress-raas/;
    classtype:trojan-activity;
    sid:2050994; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2024_02_21, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_21;
    target:src_ip;
)