ET MALWARE Atemu RAT CnC Checkin Attempt

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri; bsize:9;
content:"/api/auth";
http.header;
content:"X-API-KEY|3a 20|";
pcre:"/^[a-f0-9]{64}/R";
http.content_type; bsize:16;
content:"application|2f|json";
http.request_body;
content:"|7b 22|machine_id|22 3a 22|"; startswith; fast_pattern;
pcre:"/^[a-f0-9]{32}\x22/R";
content:"|22|version|22 3a 22|";
target:src_ip;
Raw source ET MALWARE Atemu RAT CnC Checkin Attempt · 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 Atemu RAT CnC Checkin Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:9;
    content:"/api/auth";
    http.header;
    content:"X-API-KEY|3a 20|";
    pcre:"/^[a-f0-9]{64}/R";
    http.content_type; bsize:16;
    content:"application|2f|json";
    http.request_body;
    content:"|7b 22|machine_id|22 3a 22|"; startswith; fast_pattern;
    pcre:"/^[a-f0-9]{32}\x22/R";
    content:"|22|version|22 3a 22|";
    reference:md5,a3ce0c6600781e0196aad961e92123ed;
    classtype:trojan-activity;
    sid:2068885; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_04_21, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, signature_severity Major, tag Atemu_RAT, updated_at 2026_04_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1573, mitre_technique_name Encrypted_Channel;
    target:src_ip;
)

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