ET MALWARE MEOWBACKCONN CnC Checkin

Query · suricata

flow:established,to_server;
flowbits:set,ET.MEOWBACKCONN;
http.method;
content:"POST";
http.user_agent;
content:"go-http-client/"; nocase;
http.request_body;
content:"|22|IsAdmin|22 3a|";
pcre:"/^(?:true|false)/R";
content:"|22|Domain|22 3a 22|";
content:"|22|OSVersion|22 3a 22|Microsoft Windows|20 5b|Version|20|"; fast_pattern;
content:"|22|PcName|22 3a 22|";
target:src_ip;

Rule dependencies

Feeds into

  • 1 rule read ET.MEOWBACKCONN · view all
Raw source ET MALWARE MEOWBACKCONN CnC Checkin · 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 MEOWBACKCONN CnC Checkin";
    flow:established,to_server;
    flowbits:set,ET.MEOWBACKCONN;
    http.method;
    content:"POST";
    http.user_agent;
    content:"go-http-client/"; nocase;
    http.request_body;
    content:"|22|IsAdmin|22 3a|";
    pcre:"/^(?:true|false)/R";
    content:"|22|Domain|22 3a 22|";
    content:"|22|OSVersion|22 3a 22|Microsoft Windows|20 5b|Version|20|"; fast_pattern;
    content:"|22|PcName|22 3a 22|";
    classtype:trojan-activity;
    sid:2065637; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state plaintext, created_at 2025_11_04, deployment Perimeter, malware_family MEOWBACKCONN, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_04, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system;
    target:src_ip;
)

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