ET MALWARE TrustConnect RAT CnC Activity (Agent Registration)

Query · suricata

flow:established,to_server;
flowbits:set,ET.TrustConnect.Reg;
http.method;
content:"POST";
http.uri; bsize:19;
content:"/api/agent/register"; fast_pattern;
http.header_names;
content:!"|0d 0a|referer|0d 0a|"; nocase;
content:!"|0d 0a|x-"; nocase;
http.request_body;
content:"|7b 22|installToken|22 3a 22|"; startswith;
threshold:type limit,count 1,seconds 300,track by_src;
target:src_ip;

Rule dependencies

Feeds into

  • 2 rules read ET.TrustConnect.Reg · view all
Raw source ET MALWARE TrustConnect RAT CnC Activity (Agent Registration) · 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 TrustConnect RAT CnC Activity (Agent Registration)";
    flow:established,to_server;
    flowbits:set,ET.TrustConnect.Reg;
    http.method;
    content:"POST";
    http.uri; bsize:19;
    content:"/api/agent/register"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|referer|0d 0a|"; nocase;
    content:!"|0d 0a|x-"; nocase;
    http.request_body;
    content:"|7b 22|installToken|22 3a 22|"; startswith;
    threshold:type limit,count 1,seconds 300,track by_src;
    reference:url,proofpoint.com/us/blog/threat-insight/dont-trustconnect-its-a-rat;
    classtype:command-and-control;
    sid:2067879; 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_23, deployment Perimeter, deployment SSLDecrypt, malware_family TrustConnect, confidence High, signature_severity Critical, updated_at 2026_02_23;
    target:src_ip;
)

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