ET HUNTING [TW] Likely Javascript-Obfuscator Usage Observed M3

Query · suricata

flow:to_client,established;
http.content_type;
content:"text/html";
file_data;
content:"return _0x"; fast_pattern;
pcre:"/^[a-f0-9]+/Ri";
content:"_0x"; within:100;
content:"_0x"; within:100;
content:!"FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT";
content:!"/cdn-cgi/bm/cv/result?req_id=";
Raw source ET HUNTING [TW] Likely Javascript-Obfuscator Usage Observed M3 · 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 HUNTING [TW] Likely Javascript-Obfuscator Usage Observed M3";
    flow:to_client,established;
    http.content_type;
    content:"text/html";
    file_data;
    content:"return _0x"; fast_pattern;
    pcre:"/^[a-f0-9]+/Ri";
    content:"_0x"; within:100;
    content:"_0x"; within:100;
    content:!"FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT";
    content:!"/cdn-cgi/bm/cv/result?req_id=";
    reference:url,github.com/javascript-obfuscator/javascript-obfuscator;
    classtype:misc-activity;
    sid:2036302; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_21, deployment Perimeter, performance_impact Significant, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_27, reviewed_at 2024_10_14;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.