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;)