ET HUNTING TA450 User-Agent Observed

Query · suricata

flow:established,to_server;
http.user_agent; bsize:11;
content:"application";
threshold:type limit,count 1,seconds 300,track by_src;
target:src_ip;
Raw source ET HUNTING TA450 User-Agent Observed · 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 HUNTING TA450 User-Agent Observed";
    flow:established,to_server;
    http.user_agent; bsize:11;
    content:"application";
    threshold:type limit,count 1,seconds 300,track by_src;
    classtype:misc-activity;
    sid:2067857; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_02_17, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag TA450, updated_at 2026_02_20, former_sid 2866182;
    target:src_ip;
)

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