ET USER_AGENTS Observed Suspicious User-Agent (JWrapperDownloader)

Query · suricata

flow:established,to_server;
http.user_agent; bsize:18;
content:"JWrapperDownloader"; fast_pattern;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
Raw source ET USER_AGENTS Observed Suspicious User-Agent (JWrapperDownloader) · 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 USER_AGENTS Observed Suspicious User-Agent (JWrapperDownloader)";
    flow:established,to_server;
    http.user_agent; bsize:18;
    content:"JWrapperDownloader"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,f50cd7bfe5c258c62f74a695e12f4760;
    classtype:bad-unknown;
    sid:2049862; rev:2;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2020_11_16, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2024_03_11, former_sid 2845478;
)

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