ET USER_AGENTS EmailSiphon Suspicious User-Agent Outbound

Query · suricata

flow:established,to_server;
http.user_agent;
content:"EmailSiphon"; nocase; depth:11;
Raw source ET USER_AGENTS EmailSiphon Suspicious User-Agent Outbound · 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 USER_AGENTS EmailSiphon Suspicious User-Agent Outbound";
    flow:established,to_server;
    http.user_agent;
    content:"EmailSiphon"; nocase; depth:11;
    reference:url,www.useragentstring.com/pages/useragentstring.php;
    classtype:attempted-recon;
    sid:2013033; rev:4;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2011_06_14, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, updated_at 2020_04_24;
)

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