ET MALWARE Possible Darkhotel Higasia Downloader Connectivity Check

Query · suricata

flow:established,to_server;
urilen:15;
http.method;
content:"HEAD";
http.uri;
content:"/view/index.php";
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 8.0|3b 20 20|Windows NT 6.1)"; fast_pattern;
Raw source ET MALWARE Possible Darkhotel Higasia Downloader Connectivity Check · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Possible Darkhotel Higasia Downloader Connectivity Check";
    flow:established,to_server;
    urilen:15;
    http.method;
    content:"HEAD";
    http.uri;
    content:"/view/index.php";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 8.0|3b 20 20|Windows NT 6.1)"; fast_pattern;
    reference:md5,0e1ed07bae97d8b1cc4dcfe3d56ea3ee;
    reference:url,github.com/blackorbird/APT_REPORT/blob/master/Darkhotel/higaisa/higaisa_apt_report.pdf;
    classtype:command-and-control;
    sid:2028935; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_04, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_21;
)

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