ET MALWARE Mal/Ransom-CE Connectivity Check

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/windows"; fast_pattern; endswith;
http.user_agent;
content:"MSIE";
http.host;
content:"www.microsoft.com"; bsize:17;
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
content:"|0d 0a|User-Agent|0d 0a|"; startswith;
Raw source ET MALWARE Mal/Ransom-CE 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 Mal/Ransom-CE Connectivity Check";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/windows"; fast_pattern; endswith;
    http.user_agent;
    content:"MSIE";
    http.host;
    content:"www.microsoft.com"; bsize:17;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:"|0d 0a|User-Agent|0d 0a|"; startswith;
    reference:md5,6faa7077de347ee0fa8c991934c2c3a5;
    reference:md5,a1fe3a7ff1ec997411b71212483eea33;
    reference:md5,97c0000473c5004d2e8c0464e322f429;
    classtype:trojan-activity;
    sid:2018295; rev:6;
    metadata:created_at 2014_03_18, performance_impact Moderate, signature_severity Major, updated_at 2024_04_08;
)

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