ET USER_AGENTS Suspicious User-Agent (MSIE)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"MSIE|28|6.00.2900.5512|20 28|"; fast_pattern;
content:"|3b 20|NT|28|"; distance:0;
content:"|29 3b 20|AV|28|"; distance:0;
content:"|29 3b 20|OV|28|"; distance:0;
content:"|29 3b 20|NA|28|"; distance:0;
content:"VR|28|PH";
Raw source ET USER_AGENTS Suspicious User-Agent (MSIE) · 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 (MSIE)";
    flow:established,to_server;
    http.user_agent;
    content:"MSIE|28|6.00.2900.5512|20 28|"; fast_pattern;
    content:"|3b 20|NT|28|"; distance:0;
    content:"|29 3b 20|AV|28|"; distance:0;
    content:"|29 3b 20|OV|28|"; distance:0;
    content:"|29 3b 20|NA|28|"; distance:0;
    content:"VR|28|PH";
    reference:url,documents.trendmicro.com/assets/Tech-Brief-Tropic-Trooper-s-Back-USBferry-Attack-Targets-Air-gapped-Environments.pdf;
    classtype:trojan-activity;
    sid:2030170; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_05_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_15;
)

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