ET MALWARE Bamital Connectivity Check

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/ncsi.txt";
http.header_names;
content:!"Referer|0d 0a|";
content:!"Accept-";
content:"|0d 0a|Host|0d 0a|"; depth:8;
http.user_agent;
content:"Mozilla/5.0 (compatible|3b| MSIE 9.0|3b| Windows NT 6.1|3b| WOW64|3b| Trident/5.0)"; fast_pattern;
Raw source ET MALWARE Bamital Connectivity Check · 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 Bamital Connectivity Check";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/ncsi.txt";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept-";
    content:"|0d 0a|Host|0d 0a|"; depth:8;
    http.user_agent;
    content:"Mozilla/5.0 (compatible|3b| MSIE 9.0|3b| Windows NT 6.1|3b| WOW64|3b| Trident/5.0)"; fast_pattern;
    classtype:trojan-activity;
    sid:2019754; rev:4;
    metadata:created_at 2014_11_20, signature_severity Major, updated_at 2020_05_13;
)

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