ET MALWARE Qbot Payload Request (2023-03-13) M4

Query · suricata

flow:established,to_server;
urilen:<21;
http.method;
content:"GET";
http.uri;
content:".js?4"; fast_pattern;
isdataat:!5,relative;
content:!"=";
pcre:"/^\/(?P<base_dir>[a-z]{2,4})\/(?P=base_dir)\.js\?4[0-9]{4}$/";
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
target:src_ip;
Raw source ET MALWARE Qbot Payload Request (2023-03-13) M4 · Suricata
Esc
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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Qbot Payload Request (2023-03-13) M4";
    flow:established,to_server;
    urilen:<21;
    http.method;
    content:"GET";
    http.uri;
    content:".js?4"; fast_pattern;
    isdataat:!5,relative;
    content:!"=";
    pcre:"/^\/(?P<base_dir>[a-z]{2,4})\/(?P=base_dir)\.js\?4[0-9]{4}$/";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    classtype:trojan-activity;
    sid:2044568; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2023_03_13, deployment Perimeter, deployment SSLDecrypt, malware_family Qbot, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_24;
    target:src_ip;
)

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