ET ATTACK_RESPONSE Crpx0 Ransomware Payload Inbound (Launcher)

Query · suricata

flow:established,to_client;
http.response_body;
content:"|3a|FETCH|5f|PAYLOAD"; fast_pattern;
content:"|3a 3a 20|3|2e 20|Download|20|Installer";
content:"|3a 3a 20|We|20|pass|20|the|20|AGENT|5f|ID";
target:dest_ip;
Raw source ET ATTACK_RESPONSE Crpx0 Ransomware Payload Inbound (Launcher) · 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 (Launcher)";
    flow:established,to_client;
    http.response_body;
    content:"|3a|FETCH|5f|PAYLOAD"; fast_pattern;
    content:"|3a 3a 20|3|2e 20|Download|20|Installer";
    content:"|3a 3a 20|We|20|pass|20|the|20|AGENT|5f|ID";
    classtype:trojan-activity;
    sid:2068539; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, 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;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.