ET MALWARE Malicious JS.Nemucod to PS Dropping PE Nov 14 M2

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:".php?f="; fast_pattern;
pcre:"/^\/\w+\.php\?f=[a-z]?\d{1,3}(?:\.(?:dat|gif))?$/";
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b|"; startswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Malicious JS.Nemucod to PS Dropping PE Nov 14 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Malicious JS.Nemucod to PS Dropping PE Nov 14 M2";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:".php?f="; fast_pattern;
    pcre:"/^\/\w+\.php\?f=[a-z]?\d{1,3}(?:\.(?:dat|gif))?$/";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b|"; startswith;
    http.header_names;
    content:!"Referer";
    reference:md5,551c440d76be5ab9932d8f3e8f65726e;
    classtype:trojan-activity;
    sid:2023754; rev:8;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_28, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2020_10_08;
)

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