ET USER_AGENTS Suspicious User-Agent (dBrowser CallGetResponse)

Query · suricata

flow:to_server,established;
threshold:type limit, count 2, track by_src, seconds 300;
http.user_agent;
content:"dBrowser"; startswith;
content:"CallGetResponse:"; fast_pattern; distance:3; within:16;
pcre:"/^dBrowser\x20\d\x20CallGetResponse\x3a\d$/V";
Raw source ET USER_AGENTS Suspicious User-Agent (dBrowser CallGetResponse) · 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 -> $EXTERNAL_NET any (
    msg:"ET USER_AGENTS Suspicious User-Agent (dBrowser CallGetResponse)";
    flow:to_server,established;
    threshold:type limit, count 2, track by_src, seconds 300;
    http.user_agent;
    content:"dBrowser"; startswith;
    content:"CallGetResponse:"; fast_pattern; distance:3; within:16;
    pcre:"/^dBrowser\x20\d\x20CallGetResponse\x3a\d$/V";
    reference:md5,e09ad59bff10bd4b730ee643809ec9a7;
    classtype:trojan-activity;
    sid:2034948; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_01_19, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_19, reviewed_at 2024_05_07;
)

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