ET MALWARE TA399/SideWinder antibot script

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
http.response_body;
content:"const encriptedData|20 3d 20|encode|28|finalData, secretKey|29 3b|";
content:"Body|3a 20|encriptedData"; distance:0; fast_pattern;
Raw source ET MALWARE TA399/SideWinder antibot script · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE TA399/SideWinder antibot script";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"const encriptedData|20 3d 20|encode|28|finalData, secretKey|29 3b|";
    content:"Body|3a 20|encriptedData"; distance:0; fast_pattern;
    reference:url,blog.group-ib.com/sidewinder-antibot;
    classtype:targeted-activity;
    sid:2036786; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_06_02, deployment Perimeter, deployment SSLDecrypt, malware_family Sidewinder, performance_impact Low, confidence High, signature_severity Major, tag TA399, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_02;
)

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