ET USER_AGENTS Suspicious User-Agent (ms_ie) - Crypt.ZPACK Gen Trojan Downloader GET Request

Query · suricata

flow:established,to_server;
threshold:type limit, count 2, track by_src, seconds 300;
http.header;
content:"User-Agent\: ms_ie|0d 0a|"; nocase;
Raw source ET USER_AGENTS Suspicious User-Agent (ms_ie) - Crypt.ZPACK Gen Trojan Downloader GET Request · 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 (ms_ie) - Crypt.ZPACK Gen Trojan Downloader GET Request";
    flow:established,to_server;
    threshold:type limit, count 2, track by_src, seconds 300;
    http.header;
    content:"User-Agent\: ms_ie|0d 0a|"; nocase;
    classtype:trojan-activity;
    sid:2009538; rev:7;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, tag Trojan_Downloader, updated_at 2020_08_13;
)

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