ET ATTACK_RESPONSE Crpx0 Ransomware Payload Inbound (Mac_pro_build)

Query · suricata

flow:established,to_client;
http.response_body;
content:"|23 20|MacOS|20|Ultimate|20|Pro|20|Builder"; fast_pattern;
content:"|5b|AGENT|5f|ID|5d 20 5b|THEME|3a|";
target:dest_ip;
Raw source ET ATTACK_RESPONSE Crpx0 Ransomware Payload Inbound (Mac_pro_build) · 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 Crpx0 Ransomware Payload Inbound (Mac_pro_build)";
    flow:established,to_client;
    http.response_body;
    content:"|23 20|MacOS|20|Ultimate|20|Pro|20|Builder"; fast_pattern;
    content:"|5b|AGENT|5f|ID|5d 20 5b|THEME|3a|";
    classtype:trojan-activity;
    sid:2068538; rev:1;
    metadata:affected_product Mac_OSX, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_04_02, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_04_02, 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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