ET MALWARE Possible Darkhotel Higasia Downloader Requesting Module

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/file/start?session="; depth:20; fast_pattern;
content:"&imsi="; within:20;
content:".exe"; endswith;
Raw source ET MALWARE Possible Darkhotel Higasia Downloader Requesting Module · 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 Requesting Module";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/file/start?session="; depth:20; fast_pattern;
    content:"&imsi="; within:20;
    content:".exe"; endswith;
    reference:md5,0e1ed07bae97d8b1cc4dcfe3d56ea3ee;
    reference:url,github.com/blackorbird/APT_REPORT/blob/master/Darkhotel/higaisa/higaisa_apt_report.pdf;
    classtype:command-and-control;
    sid:2028934; rev:4;
    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 2022_03_24;
)

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