ET EXPLOIT_KIT Possible Spartan/Nuclear EK Payload

Query · suricata

flow:established,from_server;
http.server;
content:"nginx"; startswith;
http.header;
content:"Accept-Ranges|3a 20|bytes|0d 0a|Content-Disposition|3a 20|inline|3b 20|filename=|0d 0a|"; fast_pattern;
pcre:"/\x20filename=\r\n(?:\r\n)?$/";
http.content_type;
content:"application/octet-stream"; startswith;
Raw source ET EXPLOIT_KIT Possible Spartan/Nuclear EK Payload · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT_KIT Possible Spartan/Nuclear EK Payload";
    flow:established,from_server;
    http.server;
    content:"nginx"; startswith;
    http.header;
    content:"Accept-Ranges|3a 20|bytes|0d 0a|Content-Disposition|3a 20|inline|3b 20|filename=|0d 0a|"; fast_pattern;
    pcre:"/\x20filename=\r\n(?:\r\n)?$/";
    http.content_type;
    content:"application/octet-stream"; startswith;
    classtype:exploit-kit;
    sid:2022135; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_11_24, deployment Perimeter, malware_family Nuclear, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2020_06_09;
)

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