ET MALWARE TA399/SideWinder Stage 2 VBS Downloader Reporting Successful Infection

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/plugins/"; depth:9;
content:"/true/true/done"; fast_pattern; endswith;
http.user_agent;
content:"WinHttp.WinHttpRequest.";
http.header_names;
content:"Referer";
content:!"Cache";
Raw source ET MALWARE TA399/SideWinder Stage 2 VBS Downloader Reporting Successful Infection · 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 TA399/SideWinder Stage 2 VBS Downloader Reporting Successful Infection";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/plugins/"; depth:9;
    content:"/true/true/done"; fast_pattern; endswith;
    http.user_agent;
    content:"WinHttp.WinHttpRequest.";
    http.header_names;
    content:"Referer";
    content:!"Cache";
    reference:md5,dfad7d4a7ecb2eed6d69abfbfb5f94c9;
    reference:url,medium.com/@Sebdraven/apt-sidewinder-changes-theirs-ttps-to-install-their-backdoor-f92604a2739;
    classtype:trojan-activity;
    sid:2026545; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_24, deployment Perimeter, malware_family Sidewinder, performance_impact Low, confidence High, signature_severity Major, tag VBS, tag TA399, updated_at 2022_03_24;
)

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