ET MALWARE Win32/StoredBt.A Activity

Query · suricata

flow:to_server,established;
http.uri;
content:".php?a1="; fast_pattern;
pcre:"/\.php\?a1=\d+&a2=(?:[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}|(?:[A-Za-z0-9\+\/]{4})*(?:[A-Za-z0-9\+\/]{2}==|[A-Za-z0-9\+\/]{3}=|[A-Za-z0-9\+\/]{4}))(?:&a\d+=[^&]+)+$/";
http.header_names;
content:!"Referer|0d 0a|";
content:!"Accept-";
Raw source ET MALWARE Win32/StoredBt.A Activity · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/StoredBt.A Activity";
    flow:to_server,established;
    http.uri;
    content:".php?a1="; fast_pattern;
    pcre:"/\.php\?a1=\d+&a2=(?:[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}-[0-9A-Fa-f]{2}|(?:[A-Za-z0-9\+\/]{4})*(?:[A-Za-z0-9\+\/]{2}==|[A-Za-z0-9\+\/]{3}=|[A-Za-z0-9\+\/]{4}))(?:&a\d+=[^&]+)+$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept-";
    reference:md5,e8e9eb1cd4be7ab27743887be2aa28e9;
    classtype:trojan-activity;
    sid:2018074; rev:4;
    metadata:created_at 2014_02_05, malware_family Win32_StoredBt_A, signature_severity Major, updated_at 2020_09_22;
)

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