ET MALWARE Stobox Connectivity Check

Query · suricata

flow:established,to_server;
threshold:type both, count 5, seconds 300, track by_src;
http.uri;
content:"/windowsupdate/v6/thanks.aspx?ln=en&&thankspage="; fast_pattern;
http.host;
content:"update.microsoft.com"; depth:20; endswith;
http.header_names;
content:"|0d 0a|Host|0d 0a|"; depth:8;
content:!"Accept-Language|0d 0a|";
content:!"Referer|0d 0a|";
content:!"Cookie|0d 0a|";
Raw source ET MALWARE Stobox 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 Stobox Connectivity Check";
    flow:established,to_server;
    threshold:type both, count 5, seconds 300, track by_src;
    http.uri;
    content:"/windowsupdate/v6/thanks.aspx?ln=en&&thankspage="; fast_pattern;
    http.host;
    content:"update.microsoft.com"; depth:20; endswith;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|"; depth:8;
    content:!"Accept-Language|0d 0a|";
    content:!"Referer|0d 0a|";
    content:!"Cookie|0d 0a|";
    reference:md5,aba20c8289b37b10d42979730674a2ca;
    classtype:trojan-activity;
    sid:2019166; rev:7;
    metadata:created_at 2014_09_11, signature_severity Major, updated_at 2020_11_05;
)

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