ET ATTACK_RESPONSE 123Stealer Payload Inbound

Query · suricata

flow:established,to_client;
http.response_body;
content:"const|20|isWin|20 3d 20|os|2e|platform|28 29 20 3d 3d 3d 20 27|win32|27 3b|";
content:"For|20|Linux|20 2d 20|use|20|script|20|directory|20 28|same|20|as|20|payload|2e|js|29|"; fast_pattern;
threshold:type limit,count 1,seconds 300,track by_dst;
target:dest_ip;
Raw source ET ATTACK_RESPONSE 123Stealer 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 ATTACK_RESPONSE 123Stealer Payload Inbound";
    flow:established,to_client;
    http.response_body;
    content:"const|20|isWin|20 3d 20|os|2e|platform|28 29 20 3d 3d 3d 20 27|win32|27 3b|";
    content:"For|20|Linux|20 2d 20|use|20|script|20|directory|20 28|same|20|as|20|payload|2e|js|29|"; fast_pattern;
    threshold:type limit,count 1,seconds 300,track by_dst;
    reference:md5,544be46f232f0cacecf73cc1be65ce62;
    classtype:trojan-activity;
    sid:2066689; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_12, deployment Perimeter, deployment SSLDecrypt, malware_family 123Stealer, confidence Medium, signature_severity Major, updated_at 2026_01_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer;
    target:dest_ip;
)

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