ET ATTACK_RESPONSE InstallFix MacOS Payload Inbound

Query · suricata

flow:established,to_client;
http.response_body;
content:"|23 21 2f|bin|2f|zsh"; depth:15;
content:"|3c 3c 27|PAYLOAD|5f|END|27|"; fast_pattern;
target:dest_ip;
Raw source ET ATTACK_RESPONSE InstallFix MacOS 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 InstallFix MacOS Payload Inbound";
    flow:established,to_client;
    http.response_body;
    content:"|23 21 2f|bin|2f|zsh"; depth:15;
    content:"|3c 3c 27|PAYLOAD|5f|END|27|"; fast_pattern;
    reference:url,pushsecurity.com/blog/installfix;
    reference:url,x.com/anyrun_app/status/2036799880392265928;
    classtype:trojan-activity;
    sid:2068435; rev:1;
    metadata:affected_product Mac_OSX, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_03_25, deployment Perimeter, deployment SSLDecrypt, malware_family installfix, confidence Medium, signature_severity Major, updated_at 2026_03_25, 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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