ET MALWARE Quad7 Botnet - Outbound rlogin Telnet Prompt from Compromised Endpoint

Query · suricata

flow:established,to_client;
content:"rlogin|3a|"; fast_pattern; startswith;
target:src_ip;
Raw source ET MALWARE Quad7 Botnet - Outbound rlogin Telnet Prompt from Compromised Endpoint · 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 tcp $HOME_NET 63210 -> any any (
    msg:"ET MALWARE Quad7 Botnet - Outbound rlogin Telnet Prompt from Compromised Endpoint";
    flow:established,to_client;
    content:"rlogin|3a|"; fast_pattern; startswith;
    reference:url,blog.sekoia.io/a-glimpse-into-the-quad7-operators-next-moves-and-associated-botnets/;
    classtype:trojan-activity;
    sid:2064292; rev:1;
    metadata:affected_product IoT, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_09_04, deployment Perimeter, deployment Internal, malware_family Quad7_Botnet, malware_family rlogin, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_04, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)

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