ET MALWARE W32/Nymaim Checkin M2

Query · suricata

flow:to_server,established;
http.method;
content:"POST";
http.content_type;
content:"application/x-www-form-urlencoded"; nocase; bsize:33;
http.user_agent;
content:"|20|MSIE|20|";
http.request_body;
content:"filename="; depth:9; fast_pattern;
content:"&data="; distance:0;
pcre:"/^filename=[a-z]+?\.[a-z]+?&data=/";
http.header_names;
content:!"Referer";
Raw source ET MALWARE W32/Nymaim Checkin M2 · 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 W32/Nymaim Checkin M2";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.content_type;
    content:"application/x-www-form-urlencoded"; nocase; bsize:33;
    http.user_agent;
    content:"|20|MSIE|20|";
    http.request_body;
    content:"filename="; depth:9; fast_pattern;
    content:"&data="; distance:0;
    pcre:"/^filename=[a-z]+?\.[a-z]+?&data=/";
    http.header_names;
    content:!"Referer";
    classtype:command-and-control;
    sid:2016757; rev:11;
    metadata:created_at 2013_04_16, signature_severity Major, updated_at 2022_10_20;
)

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