ET MALWARE Crpx0 Ransomware User-Agent Observed

Query · suricata

flow:established,to_server;
http.user_agent;
content:"crpx0-client/"; startswith;
target:src_ip;
Raw source ET MALWARE Crpx0 Ransomware User-Agent Observed · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Crpx0 Ransomware User-Agent Observed";
    flow:established,to_server;
    http.user_agent;
    content:"crpx0-client/"; startswith;
    classtype:command-and-control;
    sid:2068536; 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 High, signature_severity Critical, updated_at 2026_04_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)

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