ET MALWARE Nemucod JS Downloader Aug 01 2017

Query · suricata

flow:established,to_server;
pcre:"/\/[A-Za-z0-9]{5,9}\?+[A-Za-z0-9]{6,12}=[A-Za-z0-9]{6,12}$/U";
http.header;
content:"Accept|3a 20 2a 2f 2a 0d 0a|Accept-Language|3a|"; depth:29;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.0)"; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
content:!"Cookie|0d 0a|";
Raw source ET MALWARE Nemucod JS Downloader Aug 01 2017 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Nemucod JS Downloader Aug 01 2017";
    flow:established,to_server;
    pcre:"/\/[A-Za-z0-9]{5,9}\?+[A-Za-z0-9]{6,12}=[A-Za-z0-9]{6,12}$/U";
    http.header;
    content:"Accept|3a 20 2a 2f 2a 0d 0a|Accept-Language|3a|"; depth:29;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.0)"; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Cookie|0d 0a|";
    reference:md5,cb558b04216e0e7a9c936945ebee6611;
    classtype:trojan-activity;
    sid:2024508; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_01, deployment Perimeter, malware_family Nemucod, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_04_08;
)

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