ET MALWARE iMonitor EAM CnC Agent Request (AGENTINFOM)

alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET 1024: (
    msg:"ET MALWARE iMonitor EAM CnC Agent Request (AGENTINFOM)";
    flow:established,to_server;
    flowbits:set,ET.iMonitor.Checkin;
    content:"AGENTINFOM"; startswith; fast_pattern;
    content:"|01|"; endswith;
    threshold:type limit,count 1,seconds 300,track by_src;
    reference:url,x.com/Jane_0sint/status/1977826605767721158;
    reference:md5,447338af0ea5509735050add5ba9192a;
    classtype:command-and-control;
    sid:2065214; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_10_15, deployment Perimeter, malware_family iMonitor, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1219, mitre_technique_name Remote_Access_Software;
    target:src_ip;
)