ET MALWARE RMM Payload Delivery Behvaior Observed in HTTP Cookies

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.cookie;
content:"_pre_check="; startswith;
pcre:"/^[a-z0-9]{8}/R";
content:"|2c 20|captcha_token"; within:16; fast_pattern;
target:src_ip;
Raw source ET MALWARE RMM Payload Delivery Behvaior Observed in HTTP Cookies · 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 RMM Payload Delivery Behvaior Observed in HTTP Cookies";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.cookie;
    content:"_pre_check="; startswith;
    pcre:"/^[a-z0-9]{8}/R";
    content:"|2c 20|captcha_token"; within:16; fast_pattern;
    classtype:trojan-activity;
    sid:2068409; 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_03_24, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag RMM, updated_at 2026_03_24;
    target:src_ip;
)

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