ET MALWARE Darkgate Stealer CnC Checkin (POST) M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Darkgate Stealer CnC Checkin (POST) M2";
    flow:established,to_server;
    http.start;
    content:"POST / HTTP/1.0|0d 0a|Host|3a 20|"; startswith; fast_pattern;
    http.user_agent; bsize:33;
    content:"Mozilla/4.0 (compatible|3b 20|Synapse)";
    http.header;
    content:"|0d 0a|Keep-Alive|3a 20|300|0d 0a|";
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Keep-Alive|0d 0a|Connection|0d 0a|User-Agent|0d 0a|"; startswith;
    content:!"Referer";
    content:!"Accept";
    http.connection;
    content:"keep-alive"; bsize:10;
    reference:url,malware-traffic-analysis.net/2023/11/30/index.html;
    classtype:trojan-activity;
    sid:2049433; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_01, deployment Perimeter, malware_family DarkGate, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_01;
)