ET MALWARE Obfuscated Clickfix Javascript Payload Inbound

Query · suricata

flow:established,to_client;
http.response_body;
content:"|3c|script|3e 3b|Function|28 22 27|"; startswith;
content:"|7e|";
content:"|5e|";
content:"|2f|g|2c 5c 22 5c 22|";
content:"|5c 5c|162|5c 5c|145|5c 5c|160|5c 5c|154|5c 5c|141|5c 5c|143|5c 5c|145|5c|"; distance:0; fast_pattern;
target:src_ip;
Raw source ET MALWARE Obfuscated Clickfix Javascript Payload Inbound · Suricata
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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 Obfuscated Clickfix Javascript Payload Inbound";
    flow:established,to_client;
    http.response_body;
    content:"|3c|script|3e 3b|Function|28 22 27|"; startswith;
    content:"|7e|";
    content:"|5e|";
    content:"|2f|g|2c 5c 22 5c 22|";
    content:"|5c 5c|162|5c 5c|145|5c 5c|160|5c 5c|154|5c 5c|141|5c 5c|143|5c 5c|145|5c|"; distance:0; fast_pattern;
    reference:url,app.any.run/tasks/364c5c6e-0805-42c5-815a-f1cb704c5d9b;
    classtype:trojan-activity;
    sid:2059260; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_01_15, deployment Perimeter, deployment SSLDecrypt, malware_family ClickFix, confidence Medium, signature_severity Major, updated_at 2025_01_15, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;
    target:src_ip;
)

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