ET MALWARE Trickbot Payload Request

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
pcre:"/^\/(?:kas|ser|mac)[0-9]+\.png$/i";
http.start;
content:".png HTTP/1.1|0d 0a|Host|3a 20|"; fast_pattern;
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
content:!"User-Agent|0d 0a|";
Raw source ET MALWARE Trickbot Payload Request · Suricata
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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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Trickbot Payload Request";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\/(?:kas|ser|mac)[0-9]+\.png$/i";
    http.start;
    content:".png HTTP/1.1|0d 0a|Host|3a 20|"; fast_pattern;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    reference:md5,2c6cd25a31fe097ee7532422fc8eedc8;
    classtype:trojan-activity;
    sid:2024901; rev:7;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_10_23, deployment Perimeter, performance_impact Significant, confidence High, signature_severity Major, tag Trickbot, updated_at 2024_04_08;
)

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