ET MALWARE W32.Dreambot File Upload (No Data Sent)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/images/";
content:"_2";
pcre:"/\/images\/.*_2[FB].*\.(?:avi|gif|bmp|jpeg|png)$/i";
http.header;
content:"Content-Length|3a 20|2|0d 0a|"; fast_pattern;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
content:!"|0d 0a|Accept";
content:"|0d 0a|User-Agent|0d 0a|"; startswith;
Raw source ET MALWARE W32.Dreambot File Upload (No Data Sent) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32.Dreambot File Upload (No Data Sent)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/images/";
    content:"_2";
    pcre:"/\/images\/.*_2[FB].*\.(?:avi|gif|bmp|jpeg|png)$/i";
    http.header;
    content:"Content-Length|3a 20|2|0d 0a|"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:!"|0d 0a|Accept";
    content:"|0d 0a|User-Agent|0d 0a|"; startswith;
    reference:md5,e17b1d84da1d2c684f3e67adff7ef582;
    classtype:trojan-activity;
    sid:2022970; rev:6;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_07_14, deployment Perimeter, malware_family ursnif, malware_family Dreambot, malware_family ISFB, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_03_10;
)

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