ET MALWARE Win32/Hancitor Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Hancitor Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"DATA="; startswith; fast_pattern;
    base64_decode:bytes 156, relative;
    base64_data;
    content:"GUID=";
    content:"&BUILD="; distance:20;
    content:"&INFO="; distance:0;
    content:"&EXT="; distance:0;
    content:"&IP="; distance:0;
    content:"&TYPE="; distance:0;
    content:"&WIN="; distance:0;
    reference:md5,655d778bd44bf0c6660f92f69e48fd64;
    reference:url,twitter.com/Jane_0stin/status/1467804081708318722;
    reference:url,app.any.run/tasks/ca223281-a12f-4f03-b0f7-d152747baefb/;
    classtype:trojan-activity;
    sid:2034585; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_12_06, deployment Perimeter, malware_family Hancitor, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;
)