ET ATTACK_RESPONSE ClickFix MSHTA Command Inbound

Query · suricata

flow:established,to_client;
http.response_body; bsize:<250;
content:"|7b 22|captcha|5f|text|22 3a 22|mshta|20|"; startswith; fast_pattern;
content:"human"; distance:0;
target:dest_ip;
Raw source ET ATTACK_RESPONSE ClickFix MSHTA Command 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 ClickFix MSHTA Command Inbound";
    flow:established,to_client;
    http.response_body; bsize:<250;
    content:"|7b 22|captcha|5f|text|22 3a 22|mshta|20|"; startswith; fast_pattern;
    content:"human"; distance:0;
    reference:url,tria.ge/250307-wvydhavnt6/behavioral1;
    classtype:trojan-activity;
    sid:2060672; rev:1;
    metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2025_03_07, deployment Perimeter, malware_family ClickFix, confidence Medium, signature_severity Major, updated_at 2025_03_07, 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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