ET MALWARE TrustConnect RAT CnC Activity (Files Pending)

Query · suricata

flow:established,to_server;
content:"GET"; http_method;
content:"/api/files/pending/"; http_uri; depth:19; fast_pattern;
pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})$/UR"; http_header_names;
content:!"|0d 0a|referer|0d 0a|"; nocase;
content:!"|0d 0a|x-"; nocase;
threshold:type limit,count 1,seconds 300,track by_src;
target:src_ip;
Raw source ET MALWARE TrustConnect RAT CnC Activity (Files Pending) · Suricata
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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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE TrustConnect RAT CnC Activity (Files Pending)";
    flow:established,to_server;
    content:"GET"; http_method;
    content:"/api/files/pending/"; http_uri; depth:19; fast_pattern;
    pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})$/UR"; http_header_names;
    content:!"|0d 0a|referer|0d 0a|"; nocase;
    content:!"|0d 0a|x-"; nocase;
    threshold:type limit,count 1,seconds 300,track by_src;
    reference:md5,128e8469959cdb0a8e7e29eb84af0e79;
    classtype:command-and-control;
    sid:2067805; 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_02_17, deployment Perimeter, deployment SSLDecrypt, malware_family TrustConnect, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_02_17, 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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