ET USER_AGENTS Suspicious User-Agent Possible Trojan Downloader Shell

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Shell"; depth:5; endswith; nocase;
Raw source ET USER_AGENTS Suspicious User-Agent Possible Trojan Downloader Shell · 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 Suspicious User-Agent Possible Trojan Downloader Shell";
    flow:established,to_server;
    http.user_agent;
    content:"Shell"; depth:5; endswith; nocase;
    reference:url,www.securelist.com/en/blog/434/The_Chinese_bootkit;
    classtype:trojan-activity;
    sid:2007840; rev:12;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence Medium, signature_severity Major, tag User_Agent, tag Trojan_Downloader, updated_at 2020_10_16;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.