ET ATTACK_RESPONSE Obfuscated JS - URL Encoded Unescape Function Call Inbound

Query · suricata

flow:established,from_server;
file_data;
content:"%2e%6c%6f%63%61%74%69%6f%6e%20%3d%20%75%6e%65%73%63%61%70%65%28%22%25%75"; nocase;
Raw source ET ATTACK_RESPONSE Obfuscated JS - URL Encoded Unescape Function Call Inbound · 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 ATTACK_RESPONSE Obfuscated JS - URL Encoded Unescape Function Call Inbound";
    flow:established,from_server;
    file_data;
    content:"%2e%6c%6f%63%61%74%69%6f%6e%20%3d%20%75%6e%65%73%63%61%70%65%28%22%25%75"; nocase;
    reference:url,eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/;
    classtype:misc-activity;
    sid:2016134; rev:4;
    metadata:created_at 2012_12_30, confidence Medium, signature_severity Minor, updated_at 2022_06_10, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;
)

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