ET MALWARE Katz Stealer User-Agent Observed (katz-ontop)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"katz-ontop"; endswith;
target:src_ip;
Raw source ET MALWARE Katz Stealer User-Agent Observed (katz-ontop) · 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 -> any any (
    msg:"ET MALWARE Katz Stealer User-Agent Observed (katz-ontop)";
    flow:established,to_server;
    http.user_agent;
    content:"katz-ontop"; endswith;
    reference:url,www.nextron-systems.com/2025/05/23/katz-stealer-threat-analysis/;
    classtype:trojan-activity;
    sid:2062571; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_05_27, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, updated_at 2025_05_27;
    target:src_ip;
)

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