ET MALWARE Possible APT30 or Win32/Nuclear HTTP Framework

Query · suricata

flow:established,to_server;
http.uri;
pcre:"/\.(?:txt|gif|exe|bmp)$/i";
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Win32|29|"; depth:41;
http.header_names;
content:!"Referer";
content:!"Accept";
content:"|0d 0a|User-Agent|0d 0a|HOST|0d 0a|"; depth:20; fast_pattern;
Raw source ET MALWARE Possible APT30 or Win32/Nuclear HTTP Framework · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Possible APT30 or Win32/Nuclear HTTP Framework";
    flow:established,to_server;
    http.uri;
    pcre:"/\.(?:txt|gif|exe|bmp)$/i";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Win32|29|"; depth:41;
    http.header_names;
    content:!"Referer";
    content:!"Accept";
    content:"|0d 0a|User-Agent|0d 0a|HOST|0d 0a|"; depth:20; fast_pattern;
    reference:url,www2.fireeye.com/rs/fireye/images/rpt-apt30.pdf;
    classtype:targeted-activity;
    sid:2020897; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_04_13, deployment Perimeter, malware_family Nuclear, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2020_10_20;
)

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